ICALEPCS2019 - List of Keywords (electron)

Paper	Title	Other Keywords	Page
MOCPL06	2D-Nano-Ptychography Imaging Results on the SWING Beamline at Synchrotron SOLEIL	controls, feedback, synchrotron, experiment	91
	C. Engblom, Y.-M. Abiven, F. Alves, F. Berenguer, T. Bizien, A. Gibert, F. Langlois, A. Lestrade, P. Montaville, J. Pérez SOLEIL, Gif-sur-Yvette, France
	A new Nanoprobe system, which was originally developed in the scope of a collaboration with MAXIV (Sweden), has recently been tested and validated on the SWING beamline in Synchrotron SOLEIL. The aim of the project was to construct a Ptychography nano-imaging station. Initial steps were taken to provide a portable system capable of nanometric scans of samples with sizes ranging from the micrometer to fractions of a millimeter. Imaging was made possible by actuating a total of 16 Degrees Of Freedom (DOF) composed of a sample stage (3 DOF), a central stop stage (5 DOF), a Fresnel zone plate stage (5 DOF), as well as an order sorting aperture stage (3 DOF). These stages were actuated by an ensemble of piezo-driven and high-quality brushless motors, of which synchronized control (with kinematic modelling) was done using the Delta Tau platform. In addition, interferometry feedback was used for reconstruction purposes. Imaging results are promising: the system was able to resolve 40 nm measured with a Siemens star, the paper will describe the system and the achieved results.
	Slides MOCPL06 [19.056 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOCPL06
About •	paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA029	FORS-Up: An Upgrade of the FORS2 Instrument @ ESO VLT	controls, software, electronics, detector	253
	R. Cirami, V. Baldini, I. Coretti, P. Di Marcantonio INAF-OAT, Trieste, Italy H. Boffin, F. Derie, A. Manescau, R. Siebenmorgen ESO, Garching bei Muenchen, Germany
	The FORS Upgrade project (FORS-Up), financed by the European Southern Observatory, aims at upgrading the FORS2 instrument currently installed on the UT1 telescope of the ESO Very Large Telescope in Chile. FORS2 is an optical instrument that can be operated in different modes (imaging, polarimetry, long-slit and multi-object spectroscopy). Due to its versatility, the ESO Scientific Technical Committee has identified FORS2 as a highly demanded workhorse among the VLT instruments that shall remain operative for the next 15 years. The main goals of the FORS-Up project are the replacement of the FORS2 scientific detector and the upgrade of the instrument control software and electronics. The project is conceived as "fast track" so that FORS2 is upgraded to the VLT for 2022. This paper focuses on the outcomes of the FORS-Up Phase A, ended in February 2019, and carried out as a collaboration between ESO and INAF – Astronomical Observatory of Trieste, this latter in charge of the feasibility study of the upgrade of the control software and electronics with the latest VLT standard technologies (among them the use of the PLCs and of the latest features of the VLT Control Software).
	Poster MOPHA029 [4.293 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA029
About •	paper received ※ 27 September 2019 paper accepted ※ 08 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA049	Test-bench Design for New Beam Instrumentation Electronics at CERN	instrumentation, hardware, FPGA, electronics	323
	M. Gonzalez-Berges, J.O. Robinson, M. Saccani, V. Schramm, M.A. Stachon CERN, Meyrin, Switzerland
	The Beam Instrumentation group has designed a new general-purpose VME acquisition board that will serve as the basis for the design of new instruments and will be used in the renovation of existing systems in the future. Around 1200 boards have been produced. They underwent validation, environmental stress screening and run-in tests to ensure their performance and long term reliability. This allowed to identify potential issues at an early stage and mitigate them, minimizing future interventions and downtime. A dedicated test-bench was designed to drive the tests and continuously monitor the board functionality. One board has more than 45 functions including memories, high speed serial links and a variety of diagnostics. The test-bench was fully integrated with the CERN asset management system to allow lifecycle management from the initial production phase. The data captured during these tests was stored and analyzed regularly to find sources of failures. This was the first time that such a complete test-bench has been used. This paper presents all the details of the test-bench design and implementation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA049
About •	paper received ※ 30 September 2019 paper accepted ※ 19 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA053	Status of Control and Synchronization Systems Development at Institute of Electronic Systems	controls, LLRF, FEL, cavity	338
	M.G. Grzegrzółka, A. Abramowicz, A. Ciszewska, K. Czuba, B. Gąsowski, P.K. Jatczak, M. Kalisiak, T. Lesniak, M. Lipinski, T. Owczarek, R. Papis, I. Rutkowski, K. Sapór, M. Sawicka, D. Sikora, M. Urbański, L. Zembala, M. Żukociński Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland
	Funding: This work was supported by the Polish Ministry of Science and Higher Education under Grant DIR/WK/2016/06 and DIR/WK/2016/03. Institute of Electronic Systems (ISE) at Warsaw University of Technology designs, builds and installs control and synchronization systems for several accelerator facilities. In recent years ISE together with the Deutsches Elektronen-Synchrotron (DESY) team created the RF synchronization system for the European XFEL in Hamburg. ISE is a key partner in several other projects for DESY flagship facilities. The group participated in development of the MTCA.4 standard and designed a family of components for the MTCA.4-based LLRF control system. Currently, ISE contributes to the development of the Master Oscillators for XFEL and FLASH, and phase reference distribution system for SINBAD. Since 2016 ISE is an in-kind partner for the European Spallation Source (ESS), working on the phase reference line for the ESS linac, components for 704.42 MHz LLRF control system, including a MTCA.4-based LO signal generation module and the Cavity Simulator. In 2019 ISE became one of the co-founders of the Polish Free-Electron Laser (PolFel) located in the National Centre for Nuclear Research in Świerk. The overview of the recent projects for large physics experiments ongoing at ISE is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA053
About •	paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA066	Electronics for LCLS-II Beam Containment System Shut-off	PLC, interface, electronics, linac	366
	R.A. Kadyrov, D.G. Brown, E.P. Chin, C.I. Clarke, M. Petree, E. Rodriguez, F. Tao SLAC, Menlo Park, California, USA
	LCLS-II is a new FEL which is under construction at SLAC National Accelerator Laboratory. Its superconducting electron linac is able to produce up to 1.2 MW of beam power. Beam Containment System (BCS) is employed to limit the beam power and prevent excessive radiation in case of electron beam loss or FEL breach. Fast and slow shut-off paths are designed for devices with different response requirements. The system is required to shut-off the beam within 200 µs for some of the fast sensors. Fast path is based on custom electronic designs, and slow path leverages industrial safety-rated PLC hardware. The system spans for 4 km of LCLS-II and combines inputs from about 150 sensors of different complexity. Architecture is based on multiple levels starting with summing sensor inputs locally and to converting them into permits for the shut-off devices. Each level is implemented redundantly. Automated test and manual tests at all levels are implemented in the system. System architecture, electronics design and cable plant challenges are presented below.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA066
About •	paper received ※ 27 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA069	Automation of the Undulator Middle Plane Alignment Relative to the Electron Beam Position Using the K-Monochromator	undulator, FEL, controls, photon	375
	S. Karabekyan, S. Abeghyan, W. Freund EuXFEL, Schenefeld, Germany L. Fröhlich DESY, Hamburg, Germany
	The correct K value of an undulator is an important parameter to achieve lasing conditions at free electron lasers. The accuracy of the installation of the undulator in the tunnel is limited by the accuracy of the instruments used in surveying. Moreover, the position of the electron beam also varies depending on its alignment. Another source of misalignment is ground movement and the resulting change in the position of the tunnel. All this can lead to misalignment of the electron beam position relative to the center of the undulator gap up to several hundred microns. That, in turn, will lead to a deviation of the ΔK/K parameter several times higher than the tolerance requirement. An automated method of aligning the middle plane of the undulator, using a K-monochromator, was developed and used at European XFEL. Details of the method are described in this article. The results of the K value measurements are discussed.
	Poster MOPHA069 [0.780 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA069
About •	paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA076	Timing System Upgrade for Medical Linear Accelerator Project at SLRI	timing, FPGA, hardware, GUI	392
	R. Rujanakraikarn, P. Koonpong, S. Tesprasitte SLRI, Nakhon Ratchasima, Thailand
	A prototype of 6 MeV medical linear accelerator has been under development at Synchrotron Light Research Institute (SLRI). Several subsystems of the machine have been carefully designed and tested to prepare for x-ray generation. To maintain proper operation of the machine, pulse signals are generated to synchronize various subsystems. The timing system, based on the previous version designed on Xilinx Spartan-3 FPGA, is upgraded with better timing resolution, easier configuration with more timing channels, and future expansion of the system. A new LabVIEW GUI is also designed with more details on timing parameters for easy customization. The result of this new design is satisfactorily achieved with the resolution of 10 nanoseconds per time step and up to 15 synchronized timing channels implemented on two FPGA modules.
	Poster MOPHA076 [0.727 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA076
About •	paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA109	Python Based Application for Beam Current Transformer Signal Analysis	GUI, controls, interface, electronics	473
	M.C. Paniccia, D.M. Gassner, A. Marusic, A. Sukhanov BNL, Upton, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy. There are a variety of beam current transformers that are used at all accelerator facilities for current and bunch charge measurements. Transformer signals are traditionally measured using integrator electronics followed by a digitizer. However, integrator circuits have a limited bandwidth and are susceptible to noise. By directly digitizing the output of the transformer, the signal bandwidth is limited only by the transformer characteristics and the digitizing platform. Digital integration and filtering can then easily be applied to reduce noise resulting in an overall improvement of the beam parameter measurements. This paper describes a Python-based application that performs the filtering and integration of a current transformer pulse that has been directly digitized by an oscilloscope.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA109
About •	paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA141	Dynamic System Reliability Modelling of SLAC’s Radiation Safety Systems	controls, PLC, operation, experiment	558
	F. Tao, K.W. Belt SLAC, Menlo Park, California, USA
	When the LCLS-II project is complete, there will be three major Department of Energy (DOE) beam programs occupying the same 2-mile long accelerator tunnel, e.g. LCLS, LCLS-II and FACET-II. In addition to the geographical overlap, the number of beam loss monitors of all types has been also significantly expanded to detect power beam loss from all sources. All these factors contribute to highly complex Radiation Safety Systems (RSS) at SLAC. As RSS are subject to rigorous configuration control, and their outputs are permits directly related to beam production, even small faults can cause a long down time. As all beam programs at SLAC have the 95% beam availability target, the complex RSS’s contribution to overall beam availability and maintainability is an important subject worth detailed analysis. In this paper, we apply the dynamic system reliability engineering techniques to create the RSS reliability model for all three beam programs. Both qualitative and semi-quantitative approaches are used to identify the most critical common causes, the most vulnerable subsystem as well as the areas that require future design improvement for better maintainability.
	Poster MOPHA141 [0.863 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA141
About •	paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA142	FACET-II Radiation Safety Systems Development	radiation, linac, controls, PLC	562
	F. Tao, B.M. Bennett, N. Lipkowitz SLAC, Menlo Park, California, USA
	Facility for Advanced Accelerator Experimental Tests (FACET)-II is an upgrade of the FACET. It uses the middle third of SLAC’s 2-mile long linear accelerator to accelerate the electron beam to 10 GeV, with positron beam to be added in the Stage 2 of the project. Once the project completes in late 2019, it will be operated as a Department of Energy (DOE) user facilities for advanced accelerator science studies. In this paper, we will describe the Radiation Safety Systems (RSS) design and implementation for FACET-II project. RSS include Personnel Protection System (PPS) and Beam Containment System (BCS). Though both systems are safety critical, different technologies are used to implement safety functions. PPS uses Siemens PLC as the backbone for control but legacy CAMAC for data acquisition, while BCS develops customized electronics for faster response to protect safety devices from radiation induced damage.
	Poster MOPHA142 [1.284 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA142
About •	paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA143	Motion Control Development of the Material Handling System for Industrial Linac Project at SLRI	controls, radiation, network, operation	566
	R. Rujanakraikarn, P. Koonpong, S. Tesprasitte SLRI, Nakhon Ratchasima, Thailand
	The prototype of industrial linac for food irradiation application using x-ray has been under development at Synchrotron Light Research Institute (SLRI). Several subsystems of the machine are carefully designed for proper operation. Material handling system with its motion control and its relationship with a beam scanning system is explained in this paper. Hardware selection and software development together with a networked control system is described. This system is being developed and tested with the object detection system to monitor and control the position and velocity of materials on a conveyor belt.
	Poster MOPHA143 [1.077 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA143
About •	paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA158	Compact Electronic Logbook System	database, interface, HOM, framework	611
	L. Wang, M.T. Kang, X. Wu IHEP CSNS, Guangdong Province, People’s Republic of China C.P. Chu, F.Q. Guo, Y.C. He, D.P. Jin, J. Liu, Y.L. Zhang, Z. Zhao, P. Zhu IHEP, Beijing, People’s Republic of China
	Compact Electronic Logbook System (Clog) is designed to record the events in an organized way during operation and maintenance of an accelerator facility. Clog supports functionalities such as log submission, attachment upload, easy to retrieve logged messages, RESTful API and so on, which aims to be compact enough for anyone to conveniently deploy it and anyone familiar with Java EE (Enterprise Edition) technology can easily customize the functionalities. After the development is completed, Clog can be used in accelerator facilities such as BEPC-II (Beijing Electron/Positron Collider Upgrade) and HEPS (High Energy Photon Source). This paper presents the design, implementation and development status of Clog.
	Poster MOPHA158 [1.035 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA158
About •	paper received ※ 29 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA164	Wire Scanner for High Intensity Beam Profile Diagnostics	controls, software, data-acquisition, EPICS	622
	J. Yan, J. Gubeli, K. Jordan JLab, Newport News, Virginia, USA B. Bailey University of Tennessee, Knoxville, USA
	A control and data acquisition system of a high speed wire scanner is developed for high intensity beam profile diagnostics. The control system of the wire scanner includes two IOCs, a Soft IOC and a VME IOC. The Soft IOC connects with an Aerotech Ensemble motor drive through EPCIS motor record and controls the movement of the wire scanner. An Electrical Input card samples the real-time position of the wire through an incremental encoder, and generates a pulse to synchronize a VME ADC data acquisition card, which digitizes and samples the beam-induced signal after pre-amplification. A VME Relay Output card is installed to control the Brake Solenoid and Actuator Solenoid. All the VME I/O cards are installed on one VME crate and controlled by the VME IOC. The system configuration and software of the wire scanner are under development. Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
	Poster MOPHA164 [0.973 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA164
About •	paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUBPR05	LEReC Timing Synchronization with RHIC Beam	timing, laser, software, controls	746
	P.K. Kankiya, M.R. Costanzo, J.P. Jamilkowski BNL, Upton, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy In RHIC low energy bunched beam cooling experiment, LEReC, a 704 MHz fiber laser is modulated such that when striking a photocathode, it produces corresponding electron bunches which are accelerated and transported to overlap an ion beam bunched at 9 MHz RF frequency The need for precise timing is handled well by the existing infrastructure. A layer of software application called the timing manager has been created to track the LEReC beam concerning the RHIC beam and allow instruments to be fired in real-time units instead of bunch timing or RHIC turns. The manager also automates set-tings of different modes based on the RF frequency and maintains the timing of instrumentation with a beam. A detailed description of the bunch structure and scheme of synchronizing the RF and laser pulses will be discussed in the paper.
	Slides TUBPR05 [4.693 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-TUBPR05
About •	paper received ※ 04 October 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUCPL04	A Model-Based Simulator for the LCLS Accelerator	EPICS, software, undulator, operation	773
	M.L. Gibbs, W.S. Colocho, A. Osman, J. Shtalenkova SLAC, Menlo Park, California, USA
	The Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory is currently undergoing a major upgrade. In order to facilitate the development of new software that will be needed to operate the upgraded machine, a simulator has been developed to simulate the LCLS electron beam and the accelerator devices that measure and manipulate it. The simulator is comprised of several small "services" that simulate different types of devices, and provide an EPICS interface identical to the real control system. All of the services communicate with a central beam line model to change accelerator parameters and retrieve information about the simulated beam.
	Slides TUCPL04 [5.784 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-TUCPL04
About •	paper received ※ 01 October 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA016	A/D and D/A Processing Unit for Real Time Control of Suspended Masses in Advanced Virgo Interferometer	controls, FPGA, electronics, detector	1098
	M. Bitossi, A. Gennai INFN-Pisa, Pisa, Italy D. Passuello University of Pisa and INFN, Pisa, Italy
	AdV* is the project to upgrade the VIRGO* interferometric detector of gravitational waves. We present a major upgrade consisting of the design of new control electronics of the seismic isolation systems called Super-Attenuators (SAs). SAs are mechanical structures used to insulate optical elements from seismic noise. The control electronics are used to manage sensors, actuators, and stepping motors placed in the SAs. The design effort resulted in a high-performance signal conditioning and processing platform (UDSPT) that enables users to implement hard real-time control systems. The form factor is a variation of a double compact Module PICMG AMC.0 R2.0 Advanced MC. The key features are a TI DSP embedded, two GE ports, an AMC Interface containing SRIO, and GE, an FPGA interfacing data converters through PCIe. Additionally, it includes six 24-bit 3.83 MHz ADC and six 24-bit 320 kHz DAC converters, with fully differential inputs and outputs. In a single local control unit - a single 6U x 19 crate - up to 72 ADC + 72 DAC channels supported by 720 GFLOPs are allocated. A total of 20 local control units have been installed and currently are controlling ten SAs in the AdV detector. AdV Tech Des Rep 13 April 2012. Advanced Virgo Baseline Design *J. Phys.: Conf. Ser., 203(2010)012074.
	Poster WEPHA016 [1.858 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA016
About •	paper received ※ 23 September 2019 paper accepted ※ 11 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA021	Free-Electron Laser Optimization with Reinforcement Learning	laser, FEL, controls, free-electron-laser	1122
	N. Bruchon, G. Fenu, F.A. Pellegrino, E. Salvato University of Trieste, Trieste, Italy G. Gaio, M. Lonza Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Reinforcement Learning (RL) is one of the most promising techniques in Machine Learning because of its modest computational requirements with respect to other algorithms. RL uses an agent that takes actions within its environment to maximize a reward related to the goal it is designed to achieve. We have recently used RL as a model-free approach to improve the performance of the FERMI Free Electron Laser. A number of machine parameters are adjusted to find the optimum FEL output in terms of intensity and spectral quality. In particular we focus on the problem of the alignment of the seed laser with the electron beam, initially using a simplified model and then applying the developed algorithm on the real machine. This paper reports the results obtained and discusses pros and cons of this approach with plans for future applications.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA021
About •	paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA028	Power Supply Controller for Future Accelerator Facilities at BINP	controls, power-supply, operation, Ethernet	1145
	P.B. Cheblakov, A.V. Gerasev, S.E. Karnaev, D.V. Senkov BINP SB RAS, Novosibirsk, Russia
	A design of a new power supply controller was initiated in BINP for upgrade of existing accelerator facilities and for demands of future projects. Any accelerator facility includes a set of diverse power supplies which controllers have different specifications: number and precision of DAC/ADC channels, speed and algorithm of operation. Therefore, the main idea is to elaborate a controller, which consists of common digital part including an interface with a control system and specialized analog frontend that fits to power supplies requirements. The digital part provides easy integration to control system by means of some standard network protocol and performing some data processing and analysis. Ethernet is used for communication with controllers, MQTT is under consideration as a high-level transport protocol in some cases and EPICS IOC was tested to be embedded into controller. The initial prototype of controller is developed and deployed at VEPP-3 storage ring. The status of the work and future plans are presented in the paper.
	Poster WEPHA028 [9.746 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA028
About •	paper received ※ 04 October 2019 paper accepted ※ 20 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA044	Upgrade of the Bunch Length and Bunch Charge Control Systems for the New SLAC Free Electron Laser	linac, detector, timing, EPICS	1185
	M.P. Donadio, A.S. Fisher, L. Sapozhnikov SLAC, Menlo Park, California, USA
	In 2019 SLAC is building a new linear accelerator based on superconducting niobium cavities. The first one, now called the copper linac, could generate 120 electron bunches per second. The new one, called superconducting linac, will generate 1 million per second, bringing some challenges to many devices along with the accelerator. Most of them receive sensors and actuators in a VME-based Platform with its control running in software, with RTEMS as OS. This is feasible for 120 Hz, but not for 1 MHz. The new control hardware is ATCA-based Platform, that has carrier boards with FPGA connected to servers running Embedded real-time Linux OS, forming the High-Performance System (HPS). Instead of having all the new architecture installed at the accelerator and tested on the go, SLAC used the strategy of testing the systems in the copper linac, to have them ready to use in the superconducting linac in what was called the Mission Readiness Program. The Bunch Length System and the Bunch Charge System are examples of devices of this program. Both systems were tested in the copper linac at 120 Hz, with excellent results. The next step is to test them at the superconducting linac, at 1 MHz.
	Poster WEPHA044 [1.308 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA044
About •	paper received ※ 28 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA075	EPICS Also for Small and Medium Sized Experiments	EPICS, controls, experiment, FEL	1269
	H. Junkes FHI, Berlin, Germany
	The Max Planck Society (MPS) is now promoting the use of EPICS for data acquisition within its organization. An attempt is being made to establish an alternative to commercial systems. Not only the big experiments like radio telescopes, LIGO, accelerators and FELs will be supported, but also smaller to medium experiments. This will also benefit MPS users at beamlines of accelerators. In order to make EPICS also attractive for less IT-affine experimenters (besides physicists also chemists and biochemists), the first step is to revise the documentation, to create some dummy instructions, but also to develop, set up and test demonstration and production hardware. One focus at a later stage will be the use of the real-time operating system RTEMS. The poster shows the current status of the project and explains the planned further measures.
	Poster WEPHA075 [1.771 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA075
About •	paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA086	A Fast Wire Scanner System for the European Xfel and Its Impact on Safety Systems	FEL, operation, timing, software	1289
	T. Lensch, T. Wamsat DESY, Hamburg, Germany
	The European-XFEL is an X-ray Free Electron Laser facility located in Hamburg (Germany). The 17.5 GeV superconducting accelerator will provide photons simultaneously to several user stations. Currently 12 Wire Scanner stations are used to image transverse beam profiles in the high energy sections. These scanners provide a slow scan mode for single bunch operation. When operating with long bunch trains (>100 bunches) fast scans are used to measure beam sizes in an almost nondestructive manner. To operate fast scans multiple impacts on the beam loss system (BLM) and the charge transmission interlock (TIS) have to be taken into account. This paper focuses on the interaction between these systems and first experiences performing measurements.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA086
About •	paper received ※ 02 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA099	XLEAP-II Motion Control	controls, undulator, wiggler, feedback	1325
	M.A. Montironi, H. Bassan, M.A. Carrasco, E.M. Kraft, A. Marinelli SLAC, Menlo Park, California, USA
	The XLEAP project was conceived with the main scope of extending the generation of ultrashort pulses at LCLS to the sub-femtosecond (sub-fs) regime. As the project produced the expected results, an upgrade called XLEAP-II is being designed to provide the same functionality to LCLS-II. The XLEAP project utilized one variable gap wiggler to produce sub-fs X-ray pulses. The upgrade will involve four additional wigglers in the form of repurposed LCLS fixed gap undulators mounted on translation stages. This paper describes the design of the hardware and software architecture utilized in the motion control system of the wigglers. First it discusses how the variable gap wiggler was upgraded to be controlled by an Aerotech Ensemble motion controller through an EPICS Soft IOC (input-output controller). Then the motion control strategy for the additional four wigglers, also based around Aerotech controllers driving servomotors, is presented. Lessons learned from operating the wiggler and undulators during LCLS operation are discussed and utilized as a base upon which the upgraded motion control system is designed and built. Novel challenges are also identified and mitigations are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA099
About •	paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA113	EPICS Maintenance Tools and Practices at FRIB’s Diagnostics Department	diagnostics, controls, EPICS, operation	1356
	D.O. Omitto, S. Cogan, B.S. Martins FRIB, East Lansing, Michigan, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University. The Beam Instrumentation and Measurements department is responsible for dozens of different diagnostics devices deployed at multiple locations at the Facility for Rare Isotope Beam. In order to manage such a high number of devices, different tools were created to address preventive and corrective maintenance tasks and check the overall health of the equipment. This work will present how the EPICS tools and frameworks, such as archiver, channel finder, and pyDevSup, were integrated with our environment to help achieve a high availability for the beam diagnostic devices.
	Poster WEPHA113 [0.573 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA113
About •	paper received ※ 30 September 2019 paper accepted ※ 20 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA138	Orbit Correction With Machine Learning Techniques at the Synchrotron Light Source DELTA	network, storage-ring, controls, synchrotron	1426
	D. Schirmer DELTA, Dortmund, Germany
	In the last years, artificial intelligence (AI) has experienced a renaissance in many fields. AI-based concepts are nature-inspired and can also be used in the field of accelerator controls. At DELTA, various studies on this subject were conducted in the past. Among other possible applications, the use of neural networks for automated correction of the electron beam position (orbit control) is of interest. Machine learning (ML) simulations with a DELTA storage ring model were already successful. Recently, conventional Feed-Forward Neural Networks (FFNN) were trained on measured orbits to apply local and global beam position corrections to the 1.5 GeV storage ring DELTA. First experimental results are presented and compared with other orbit control methods.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA138
About •	paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA161	Revisiting the Bunch-Synchronized Data Acquisition System for the European XFEL Accelerator	controls, FEL, data-acquisition, interface	1460
	T. Wilksen, A. Aghababyan, L. Fröhlich, O. Hensler, R. Kammering, K. Rehlich, V. Rybnikov DESY, Hamburg, Germany
	After about two years in operation the bunch-synchronized data acquisition as used with the accelerator control system at the European XFEL is being revisited and reevaluated. As we have now gained quite some experience with the current system design it was found to have shortfalls specifically with respect to the offered methods for data retrieval and management. In the context of modern data collection and management technologies readily in use by huge internet companies, new frameworks are being evaluated as a control-system independent replacement for data reduction, processing and online analysis. The main focus here is currently put on streaming technologies. Different approaches are being discussed in this paper and reviewed for feasibility and adaptability for control system architectures used at DESY’s accelerator facilities.
	Poster WEPHA161 [2.687 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA161
About •	paper received ※ 27 September 2019 paper accepted ※ 20 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WESH3002	Control System for Fast Components of Electron Beam Welding Machines	controls, EPICS, real-time, experiment	1516
	A.V. Gerasev, P.B. Cheblakov BINP SB RAS, Novosibirsk, Russia
	Modern electron beam machines for different applications including welding, additive technologies and etc. consist of many different subsystems, which should be controlled and monitored. They could be divided by so-called fast and slow subsystems. Slow subsystems allow reaction time to be around couple of seconds that can be implemented using PC. Fast subsystems require time to be around hundreds of microseconds combined with flexible logic. We present an implementation of such fast system for mechanical moving platform and electron beam control. The core of this system is single board computer Raspberry Pi. We employed a technique of fast waveform generation using Raspberry Pi on-chip DMA to manipulate stepper motors. Raspberry Pi was equipped by external CAN controller to operate an electron beam via CAN DACs. Special software was developed including libraries for low- and high-level technical process control written in C and Rust; and in-browser graphical user interface over HTTP and WebSockets. Finally, we assembled our hardware inside standard 19-inch rack mount chassis and integrated our system inside experimental electron beam machine infrastructure.
	Poster WESH3002 [6.479 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WESH3002
About •	paper received ※ 02 October 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WESH4002	A PyDM User Interface for an LCLS Simulator	interface, controls, linac, klystron	1525
	M.L. Gibbs, W.S. Colocho, A. Osman, J. Shtalenkova, H.H. Slepicka SLAC, Menlo Park, California, USA
	PyDM (Python Display Manager) is a framework for building control system user interfaces. A user interface for the LCLS (Linac Coherent Light Source) simulator has been built in PyDM. The simulator interface gives a realistic experience of operating many parts of the LCLS accelerator, and can be used for training new accelerator operators on routine tasks. This interface also provides a good demonstration of the experience of using PyDM in a real-world environment.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WESH4002
About •	paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THAPP05	Overview of Acquisition and Control Electronics and Concepts for Experiments and Beam Transport at the European XFEL	PLC, controls, interface, FEL	1554
	P. Gessler, H. Ali, F. Babies, K.-E. Ballak, H. Bamaga, B. Baranasic, O. Bieler, N. Coppola, K. Dornack, J. Eilers, D. Emes, B. Fernandes, M. Fobian, T. Freyermuth, S.T. Huynh, N. Jardón Bueno, M. Meyer, O. Oshtuk, P. Parlicki, J. Reifschläger, S. Sayar, H. Sotoudi Namin, M. Stupar, J. Tolkiehn, H. Vega Perez, S. Wagner, J. Zach EuXFEL, Schenefeld, Germany
	FPGA based fast electronics to acquire and pre-process signals of detectors and diagnostics and PLC based hardware and software for motion, vacuum and other control and monitoring applications are key elements of the European X-Ray Free Electron Laser. In order to bring the newly developed scientific user facility up and running, the underlying electrical and electronic components require a diverse array of tools and processes to be developed in order to meet the continually adapting requirements and make use of technological advances. Many challenges were faced, including high availability and up-time, adaptability to a dynamic environment, rapid lead-time for integration of complex components, numerous instrumentation installations and commissioning, high time resolution and subsequently, high demands on data and sampling rates, synchronization and real-time processing. In this contribution we will provide an overview of the selected technologies, developed concepts and solutions along with generically designed frameworks and tools, which aim to provide a high degree of standardization on the control systems and even automatic generation from requirements to final install.
	Slides THAPP05 [13.323 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THAPP05
About •	paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THCPR03	A Safety Rated FPGA Framework for Fast Safety Systems	FPGA, PLC, hardware, diagnostics	1626
	F. Tao, B.M. Bennett, D.G. Brown, J. Jones, M.W. Stettler SLAC, Menlo Park, California, USA
	In this paper, we will introduce a generic safety-rated FPGA design template. FMEDA analysis, hardware reliability modeling, firmware development, verification and validation will be described in details to demonstrate the IEC 61508 compliant development process. In this dual redundant design, each chain consists a FPGA chip from different manufacturers to minimize the potential common cause failures. Cross checks between FPGAs and end-to-end self-checks are performed to increase the diagnostic coverage and improve the reliability. Based on this safety FPGA template, an Average Current Monitor (ACM) system is developed at SLAC with the addition of a safety PLC for diagnostics and a HMI for user interface. The overall system is deployed as part of Beam Containment System (BCS) to limit the beam current with the target Safety Integrity Level (SIL) 2.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THCPR03
About •	paper received ※ 01 October 2019 paper accepted ※ 08 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THCPR04	The European XFEL Beam Loss Monitor System	FEL, high-voltage, undulator, controls	1630
	T. Wamsat, T. Lensch DESY, Hamburg, Germany
	The European XFEL MTCA based Beam Loss Monitor (BLM) System is composed of about 470 BLMs, which are part of the Machine Protection System (MPS). The BLMs detect losses of the electron beam, in order to protect accelerator components from damage and excessive activation, in particular the undulators, since they are made of permanent magnets. Also each cold accelerating module is equipped with a BLM to measure the sudden onset of field emission (dark current) in cavities. In addition some BLMs are used as detectors for wire- scanners. Further firmware and server developments related to alarm generation and handling are ongoing. The BLM systems structure, the current status and the different possibilities to trigger alarms which stop the electron beam will be presented.
	Slides THCPR04 [7.156 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THCPR04
About •	paper received ※ 02 October 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THCPR07	Electronics for LCLS-II Beam Containment System Loss Monitors	electronics, controls, PLC, radiation	1641
	R.A. Kadyrov, C.I. Clarke, A.S. Fisher, M. Petree, C. Yee SLAC, Menlo Park, California, USA
	LCLS-II is a new FEL which is under construction at SLAC National Accelerator Laboratory. Its superconducting electron linac is able to produce up to 1.2 MW of beam power. In event of electron beam loss, radiation levels can exceed allowed levels outside thin shielding originally built for a lower energy LCLS linac. Beam Containment System (BCS) loss monitors are employed to detect the radiation and shut-off the beam within 200 µs, limit the radiation dose in occupied areas and minimize damage to the equipment. sCVD single-crystal diamond particle detectors are used as Point Beam Loss Monitors (PBLM) to detect losses locally. Fiber optics is selected as Long Beam Loss Monitor (LBLM). PMT at downstream end of the LBLM detects light produced by Cherenkov radiation. LBLM provides continuous coverage along electron beam path from the gun to the dump. Unified set of electronics is designed to integrate the charge from PMT or sCVD, compare the loss with predefined threshold and generate the fault if the limit is breached. Continuous self-checking is implemented for both types of sensors. Challenges in electronics design, cable selection and self-checking implementation are discussed.
	Slides THCPR07 [1.204 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THCPR07
About •	paper received ※ 27 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THCPR08	SPIRAL2 Machine Protection System Status Report	controls, PLC, software, interface	1645
	C.H. Patard, C. Berthe, F. Bucaille, G. Duteil, P. Gillette, E. Lécorché, G. Normand, J.-F. Rozé, Q. Tura GANIL, Caen, France
	The phase 1 of the SPIRAL2 facility, the extension project of the GANIL laboratory in Caen, France, is to be commissioned. The accelerator, composed of a normal conducting RFQ and a superconducting linac, is designed to accelerate high power deuteron and heavy ion beams up to 200 kW. A Machine Protection System (MPS) has been implemented to protect the accelerator from thermal damages for this very large range of beam intensities. This paper presents the solutions chosen for this system, composed of three subsystems: one dedicated to thermal protection which requires a PLC and a fast electronic system, a second one dedicated to enlarged safety protection, and a third safety subsystem dedicated to fast vacuum valve protection. Both of those subsystems work associated with a global EPICS-based control and HMI system, which gives the operation team global supervision of the accelerator and allows controlling sensor trigger thresholds, interlock system, beam initialization and power increase through the beam time structure. The MPS has been developed and is currently tested to be ready for the incoming SPIRAL2 commissioning.
	Slides THCPR08 [3.758 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THCPR08
About •	paper received ※ 24 September 2019 paper accepted ※ 11 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOCPL06

2D-Nano-Ptychography Imaging Results on the SWING Beamline at Synchrotron SOLEIL

controls, feedback, synchrotron, experiment

91

C. Engblom, Y.-M. Abiven, F. Alves, F. Berenguer, T. Bizien, A. Gibert, F. Langlois, A. Lestrade, P. Montaville, J. Pérez
SOLEIL, Gif-sur-Yvette, France

A new Nanoprobe system, which was originally developed in the scope of a collaboration with MAXIV (Sweden), has recently been tested and validated on the SWING beamline in Synchrotron SOLEIL. The aim of the project was to construct a Ptychography nano-imaging station. Initial steps were taken to provide a portable system capable of nanometric scans of samples with sizes ranging from the micrometer to fractions of a millimeter. Imaging was made possible by actuating a total of 16 Degrees Of Freedom (DOF) composed of a sample stage (3 DOF), a central stop stage (5 DOF), a Fresnel zone plate stage (5 DOF), as well as an order sorting aperture stage (3 DOF). These stages were actuated by an ensemble of piezo-driven and high-quality brushless motors, of which synchronized control (with kinematic modelling) was done using the Delta Tau platform. In addition, interferometry feedback was used for reconstruction purposes. Imaging results are promising: the system was able to resolve 40 nm measured with a Siemens star, the paper will describe the system and the achieved results.

Slides MOCPL06 [19.056 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOCPL06

About •

paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA029

FORS-Up: An Upgrade of the FORS2 Instrument @ ESO VLT

controls, software, electronics, detector

253

R. Cirami, V. Baldini, I. Coretti, P. Di Marcantonio
INAF-OAT, Trieste, Italy
H. Boffin, F. Derie, A. Manescau, R. Siebenmorgen
ESO, Garching bei Muenchen, Germany

The FORS Upgrade project (FORS-Up), financed by the European Southern Observatory, aims at upgrading the FORS2 instrument currently installed on the UT1 telescope of the ESO Very Large Telescope in Chile. FORS2 is an optical instrument that can be operated in different modes (imaging, polarimetry, long-slit and multi-object spectroscopy). Due to its versatility, the ESO Scientific Technical Committee has identified FORS2 as a highly demanded workhorse among the VLT instruments that shall remain operative for the next 15 years. The main goals of the FORS-Up project are the replacement of the FORS2 scientific detector and the upgrade of the instrument control software and electronics. The project is conceived as "fast track" so that FORS2 is upgraded to the VLT for 2022. This paper focuses on the outcomes of the FORS-Up Phase A, ended in February 2019, and carried out as a collaboration between ESO and INAF – Astronomical Observatory of Trieste, this latter in charge of the feasibility study of the upgrade of the control software and electronics with the latest VLT standard technologies (among them the use of the PLCs and of the latest features of the VLT Control Software).

Poster MOPHA029 [4.293 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA029

About •

paper received ※ 27 September 2019 paper accepted ※ 08 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA049

Test-bench Design for New Beam Instrumentation Electronics at CERN

instrumentation, hardware, FPGA, electronics

323

M. Gonzalez-Berges, J.O. Robinson, M. Saccani, V. Schramm, M.A. Stachon
CERN, Meyrin, Switzerland

The Beam Instrumentation group has designed a new general-purpose VME acquisition board that will serve as the basis for the design of new instruments and will be used in the renovation of existing systems in the future. Around 1200 boards have been produced. They underwent validation, environmental stress screening and run-in tests to ensure their performance and long term reliability. This allowed to identify potential issues at an early stage and mitigate them, minimizing future interventions and downtime. A dedicated test-bench was designed to drive the tests and continuously monitor the board functionality. One board has more than 45 functions including memories, high speed serial links and a variety of diagnostics. The test-bench was fully integrated with the CERN asset management system to allow lifecycle management from the initial production phase. The data captured during these tests was stored and analyzed regularly to find sources of failures. This was the first time that such a complete test-bench has been used. This paper presents all the details of the test-bench design and implementation.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA049

About •

paper received ※ 30 September 2019 paper accepted ※ 19 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA053

Status of Control and Synchronization Systems Development at Institute of Electronic Systems

controls, LLRF, FEL, cavity

338

M.G. Grzegrzółka, A. Abramowicz, A. Ciszewska, K. Czuba, B. Gąsowski, P.K. Jatczak, M. Kalisiak, T. Lesniak, M. Lipinski, T. Owczarek, R. Papis, I. Rutkowski, K. Sapór, M. Sawicka, D. Sikora, M. Urbański, L. Zembala, M. Żukociński
Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland

Funding: This work was supported by the Polish Ministry of Science and Higher Education under Grant DIR/WK/2016/06 and DIR/WK/2016/03.
Institute of Electronic Systems (ISE) at Warsaw University of Technology designs, builds and installs control and synchronization systems for several accelerator facilities. In recent years ISE together with the Deutsches Elektronen-Synchrotron (DESY) team created the RF synchronization system for the European XFEL in Hamburg. ISE is a key partner in several other projects for DESY flagship facilities. The group participated in development of the MTCA.4 standard and designed a family of components for the MTCA.4-based LLRF control system. Currently, ISE contributes to the development of the Master Oscillators for XFEL and FLASH, and phase reference distribution system for SINBAD. Since 2016 ISE is an in-kind partner for the European Spallation Source (ESS), working on the phase reference line for the ESS linac, components for 704.42 MHz LLRF control system, including a MTCA.4-based LO signal generation module and the Cavity Simulator. In 2019 ISE became one of the co-founders of the Polish Free-Electron Laser (PolFel) located in the National Centre for Nuclear Research in Świerk. The overview of the recent projects for large physics experiments ongoing at ISE is presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA053

About •

paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA066

Electronics for LCLS-II Beam Containment System Shut-off

PLC, interface, electronics, linac

366

R.A. Kadyrov, D.G. Brown, E.P. Chin, C.I. Clarke, M. Petree, E. Rodriguez, F. Tao
SLAC, Menlo Park, California, USA

LCLS-II is a new FEL which is under construction at SLAC National Accelerator Laboratory. Its superconducting electron linac is able to produce up to 1.2 MW of beam power. Beam Containment System (BCS) is employed to limit the beam power and prevent excessive radiation in case of electron beam loss or FEL breach. Fast and slow shut-off paths are designed for devices with different response requirements. The system is required to shut-off the beam within 200 µs for some of the fast sensors. Fast path is based on custom electronic designs, and slow path leverages industrial safety-rated PLC hardware. The system spans for 4 km of LCLS-II and combines inputs from about 150 sensors of different complexity. Architecture is based on multiple levels starting with summing sensor inputs locally and to converting them into permits for the shut-off devices. Each level is implemented redundantly. Automated test and manual tests at all levels are implemented in the system. System architecture, electronics design and cable plant challenges are presented below.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA066

About •

paper received ※ 27 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA069

Automation of the Undulator Middle Plane Alignment Relative to the Electron Beam Position Using the K-Monochromator

undulator, FEL, controls, photon

375

S. Karabekyan, S. Abeghyan, W. Freund
EuXFEL, Schenefeld, Germany
L. Fröhlich
DESY, Hamburg, Germany

The correct K value of an undulator is an important parameter to achieve lasing conditions at free electron lasers. The accuracy of the installation of the undulator in the tunnel is limited by the accuracy of the instruments used in surveying. Moreover, the position of the electron beam also varies depending on its alignment. Another source of misalignment is ground movement and the resulting change in the position of the tunnel. All this can lead to misalignment of the electron beam position relative to the center of the undulator gap up to several hundred microns. That, in turn, will lead to a deviation of the ΔK/K parameter several times higher than the tolerance requirement. An automated method of aligning the middle plane of the undulator, using a K-monochromator, was developed and used at European XFEL. Details of the method are described in this article. The results of the K value measurements are discussed.

Poster MOPHA069 [0.780 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA069

About •

paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA076

Timing System Upgrade for Medical Linear Accelerator Project at SLRI

timing, FPGA, hardware, GUI

392

R. Rujanakraikarn, P. Koonpong, S. Tesprasitte
SLRI, Nakhon Ratchasima, Thailand

A prototype of 6 MeV medical linear accelerator has been under development at Synchrotron Light Research Institute (SLRI). Several subsystems of the machine have been carefully designed and tested to prepare for x-ray generation. To maintain proper operation of the machine, pulse signals are generated to synchronize various subsystems. The timing system, based on the previous version designed on Xilinx Spartan-3 FPGA, is upgraded with better timing resolution, easier configuration with more timing channels, and future expansion of the system. A new LabVIEW GUI is also designed with more details on timing parameters for easy customization. The result of this new design is satisfactorily achieved with the resolution of 10 nanoseconds per time step and up to 15 synchronized timing channels implemented on two FPGA modules.

Poster MOPHA076 [0.727 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA076

About •

paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA109

Python Based Application for Beam Current Transformer Signal Analysis

GUI, controls, interface, electronics

473

M.C. Paniccia, D.M. Gassner, A. Marusic, A. Sukhanov
BNL, Upton, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
There are a variety of beam current transformers that are used at all accelerator facilities for current and bunch charge measurements. Transformer signals are traditionally measured using integrator electronics followed by a digitizer. However, integrator circuits have a limited bandwidth and are susceptible to noise. By directly digitizing the output of the transformer, the signal bandwidth is limited only by the transformer characteristics and the digitizing platform. Digital integration and filtering can then easily be applied to reduce noise resulting in an overall improvement of the beam parameter measurements. This paper describes a Python-based application that performs the filtering and integration of a current transformer pulse that has been directly digitized by an oscilloscope.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA109

About •

paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA141

Dynamic System Reliability Modelling of SLAC’s Radiation Safety Systems

controls, PLC, operation, experiment

558

F. Tao, K.W. Belt
SLAC, Menlo Park, California, USA

When the LCLS-II project is complete, there will be three major Department of Energy (DOE) beam programs occupying the same 2-mile long accelerator tunnel, e.g. LCLS, LCLS-II and FACET-II. In addition to the geographical overlap, the number of beam loss monitors of all types has been also significantly expanded to detect power beam loss from all sources. All these factors contribute to highly complex Radiation Safety Systems (RSS) at SLAC. As RSS are subject to rigorous configuration control, and their outputs are permits directly related to beam production, even small faults can cause a long down time. As all beam programs at SLAC have the 95% beam availability target, the complex RSS’s contribution to overall beam availability and maintainability is an important subject worth detailed analysis. In this paper, we apply the dynamic system reliability engineering techniques to create the RSS reliability model for all three beam programs. Both qualitative and semi-quantitative approaches are used to identify the most critical common causes, the most vulnerable subsystem as well as the areas that require future design improvement for better maintainability.

Poster MOPHA141 [0.863 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA141

About •

paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA142

FACET-II Radiation Safety Systems Development

radiation, linac, controls, PLC

562

F. Tao, B.M. Bennett, N. Lipkowitz
SLAC, Menlo Park, California, USA

Facility for Advanced Accelerator Experimental Tests (FACET)-II is an upgrade of the FACET. It uses the middle third of SLAC’s 2-mile long linear accelerator to accelerate the electron beam to 10 GeV, with positron beam to be added in the Stage 2 of the project. Once the project completes in late 2019, it will be operated as a Department of Energy (DOE) user facilities for advanced accelerator science studies. In this paper, we will describe the Radiation Safety Systems (RSS) design and implementation for FACET-II project. RSS include Personnel Protection System (PPS) and Beam Containment System (BCS). Though both systems are safety critical, different technologies are used to implement safety functions. PPS uses Siemens PLC as the backbone for control but legacy CAMAC for data acquisition, while BCS develops customized electronics for faster response to protect safety devices from radiation induced damage.

Poster MOPHA142 [1.284 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA142

About •

paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA143

Motion Control Development of the Material Handling System for Industrial Linac Project at SLRI

controls, radiation, network, operation

566

R. Rujanakraikarn, P. Koonpong, S. Tesprasitte
SLRI, Nakhon Ratchasima, Thailand

The prototype of industrial linac for food irradiation application using x-ray has been under development at Synchrotron Light Research Institute (SLRI). Several subsystems of the machine are carefully designed for proper operation. Material handling system with its motion control and its relationship with a beam scanning system is explained in this paper. Hardware selection and software development together with a networked control system is described. This system is being developed and tested with the object detection system to monitor and control the position and velocity of materials on a conveyor belt.

Poster MOPHA143 [1.077 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA143

About •

paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA158

Compact Electronic Logbook System

database, interface, HOM, framework

611

L. Wang, M.T. Kang, X. Wu
IHEP CSNS, Guangdong Province, People’s Republic of China
C.P. Chu, F.Q. Guo, Y.C. He, D.P. Jin, J. Liu, Y.L. Zhang, Z. Zhao, P. Zhu
IHEP, Beijing, People’s Republic of China

Compact Electronic Logbook System (Clog) is designed to record the events in an organized way during operation and maintenance of an accelerator facility. Clog supports functionalities such as log submission, attachment upload, easy to retrieve logged messages, RESTful API and so on, which aims to be compact enough for anyone to conveniently deploy it and anyone familiar with Java EE (Enterprise Edition) technology can easily customize the functionalities. After the development is completed, Clog can be used in accelerator facilities such as BEPC-II (Beijing Electron/Positron Collider Upgrade) and HEPS (High Energy Photon Source). This paper presents the design, implementation and development status of Clog.

Poster MOPHA158 [1.035 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA158

About •

paper received ※ 29 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPHA164

Wire Scanner for High Intensity Beam Profile Diagnostics

controls, software, data-acquisition, EPICS

622

J. Yan, J. Gubeli, K. Jordan
JLab, Newport News, Virginia, USA
B. Bailey
University of Tennessee, Knoxville, USA

A control and data acquisition system of a high speed wire scanner is developed for high intensity beam profile diagnostics. The control system of the wire scanner includes two IOCs, a Soft IOC and a VME IOC. The Soft IOC connects with an Aerotech Ensemble motor drive through EPCIS motor record and controls the movement of the wire scanner. An Electrical Input card samples the real-time position of the wire through an incremental encoder, and generates a pulse to synchronize a VME ADC data acquisition card, which digitizes and samples the beam-induced signal after pre-amplification. A VME Relay Output card is installed to control the Brake Solenoid and Actuator Solenoid. All the VME I/O cards are installed on one VME crate and controlled by the VME IOC. The system configuration and software of the wire scanner are under development.
Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.

Poster MOPHA164 [0.973 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA164

About •

paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUBPR05

LEReC Timing Synchronization with RHIC Beam

timing, laser, software, controls

746

P.K. Kankiya, M.R. Costanzo, J.P. Jamilkowski
BNL, Upton, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy
In RHIC low energy bunched beam cooling experiment, LEReC, a 704 MHz fiber laser is modulated such that when striking a photocathode, it produces corresponding electron bunches which are accelerated and transported to overlap an ion beam bunched at 9 MHz RF frequency The need for precise timing is handled well by the existing infrastructure. A layer of software application called the timing manager has been created to track the LEReC beam concerning the RHIC beam and allow instruments to be fired in real-time units instead of bunch timing or RHIC turns. The manager also automates set-tings of different modes based on the RF frequency and maintains the timing of instrumentation with a beam. A detailed description of the bunch structure and scheme of synchronizing the RF and laser pulses will be discussed in the paper.

Slides TUBPR05 [4.693 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-TUBPR05

About •

paper received ※ 04 October 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUCPL04

A Model-Based Simulator for the LCLS Accelerator

EPICS, software, undulator, operation

773

M.L. Gibbs, W.S. Colocho, A. Osman, J. Shtalenkova
SLAC, Menlo Park, California, USA

The Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory is currently undergoing a major upgrade. In order to facilitate the development of new software that will be needed to operate the upgraded machine, a simulator has been developed to simulate the LCLS electron beam and the accelerator devices that measure and manipulate it. The simulator is comprised of several small "services" that simulate different types of devices, and provide an EPICS interface identical to the real control system. All of the services communicate with a central beam line model to change accelerator parameters and retrieve information about the simulated beam.

Slides TUCPL04 [5.784 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-TUCPL04

About •

paper received ※ 01 October 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA016

A/D and D/A Processing Unit for Real Time Control of Suspended Masses in Advanced Virgo Interferometer

controls, FPGA, electronics, detector

1098

M. Bitossi, A. Gennai
INFN-Pisa, Pisa, Italy
D. Passuello
University of Pisa and INFN, Pisa, Italy

AdV* is the project to upgrade** the VIRGO*** interferometric detector of gravitational waves. We present a major upgrade consisting of the design of new control electronics of the seismic isolation systems called Super-Attenuators (SAs)*. SAs are mechanical structures used to insulate optical elements from seismic noise. The control electronics are used to manage sensors, actuators, and stepping motors placed in the SAs. The design effort resulted in a high-performance signal conditioning and processing platform (UDSPT) that enables users to implement hard real-time control systems. The form factor is a variation of a double compact Module PICMG AMC.0 R2.0 Advanced MC. The key features are a TI DSP embedded, two GE ports, an AMC Interface containing SRIO, and GE, an FPGA interfacing data converters through PCIe. Additionally, it includes six 24-bit 3.83 MHz ADC and six 24-bit 320 kHz DAC converters, with fully differential inputs and outputs. In a single local control unit - a single 6U x 19 crate - up to 72 ADC + 72 DAC channels supported by 720 GFLOPs are allocated. A total of 20 local control units have been installed and currently are controlling ten SAs in the AdV detector.
*AdV Tech Des Rep 13 April 2012.
**Advanced Virgo Baseline Design
***J. Phys.: Conf. Ser., 203(2010)012074.

Poster WEPHA016 [1.858 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA016

About •

paper received ※ 23 September 2019 paper accepted ※ 11 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA021

Free-Electron Laser Optimization with Reinforcement Learning

laser, FEL, controls, free-electron-laser

1122

N. Bruchon, G. Fenu, F.A. Pellegrino, E. Salvato
University of Trieste, Trieste, Italy
G. Gaio, M. Lonza
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Reinforcement Learning (RL) is one of the most promising techniques in Machine Learning because of its modest computational requirements with respect to other algorithms. RL uses an agent that takes actions within its environment to maximize a reward related to the goal it is designed to achieve. We have recently used RL as a model-free approach to improve the performance of the FERMI Free Electron Laser. A number of machine parameters are adjusted to find the optimum FEL output in terms of intensity and spectral quality. In particular we focus on the problem of the alignment of the seed laser with the electron beam, initially using a simplified model and then applying the developed algorithm on the real machine. This paper reports the results obtained and discusses pros and cons of this approach with plans for future applications.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA021

About •

paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA028

Power Supply Controller for Future Accelerator Facilities at BINP

controls, power-supply, operation, Ethernet

1145

P.B. Cheblakov, A.V. Gerasev, S.E. Karnaev, D.V. Senkov
BINP SB RAS, Novosibirsk, Russia

A design of a new power supply controller was initiated in BINP for upgrade of existing accelerator facilities and for demands of future projects. Any accelerator facility includes a set of diverse power supplies which controllers have different specifications: number and precision of DAC/ADC channels, speed and algorithm of operation. Therefore, the main idea is to elaborate a controller, which consists of common digital part including an interface with a control system and specialized analog frontend that fits to power supplies requirements. The digital part provides easy integration to control system by means of some standard network protocol and performing some data processing and analysis. Ethernet is used for communication with controllers, MQTT is under consideration as a high-level transport protocol in some cases and EPICS IOC was tested to be embedded into controller. The initial prototype of controller is developed and deployed at VEPP-3 storage ring. The status of the work and future plans are presented in the paper.

Poster WEPHA028 [9.746 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA028

About •

paper received ※ 04 October 2019 paper accepted ※ 20 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA044

Upgrade of the Bunch Length and Bunch Charge Control Systems for the New SLAC Free Electron Laser

linac, detector, timing, EPICS

1185

M.P. Donadio, A.S. Fisher, L. Sapozhnikov
SLAC, Menlo Park, California, USA

In 2019 SLAC is building a new linear accelerator based on superconducting niobium cavities. The first one, now called the copper linac, could generate 120 electron bunches per second. The new one, called superconducting linac, will generate 1 million per second, bringing some challenges to many devices along with the accelerator. Most of them receive sensors and actuators in a VME-based Platform with its control running in software, with RTEMS as OS. This is feasible for 120 Hz, but not for 1 MHz. The new control hardware is ATCA-based Platform, that has carrier boards with FPGA connected to servers running Embedded real-time Linux OS, forming the High-Performance System (HPS). Instead of having all the new architecture installed at the accelerator and tested on the go, SLAC used the strategy of testing the systems in the copper linac, to have them ready to use in the superconducting linac in what was called the Mission Readiness Program. The Bunch Length System and the Bunch Charge System are examples of devices of this program. Both systems were tested in the copper linac at 120 Hz, with excellent results. The next step is to test them at the superconducting linac, at 1 MHz.

Poster WEPHA044 [1.308 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA044

About •

paper received ※ 28 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA075

EPICS Also for Small and Medium Sized Experiments

EPICS, controls, experiment, FEL

1269

H. Junkes
FHI, Berlin, Germany

The Max Planck Society (MPS) is now promoting the use of EPICS for data acquisition within its organization. An attempt is being made to establish an alternative to commercial systems. Not only the big experiments like radio telescopes, LIGO, accelerators and FELs will be supported, but also smaller to medium experiments. This will also benefit MPS users at beamlines of accelerators. In order to make EPICS also attractive for less IT-affine experimenters (besides physicists also chemists and biochemists), the first step is to revise the documentation, to create some dummy instructions, but also to develop, set up and test demonstration and production hardware. One focus at a later stage will be the use of the real-time operating system RTEMS. The poster shows the current status of the project and explains the planned further measures.

Poster WEPHA075 [1.771 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA075

About •

paper received ※ 30 September 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA086

A Fast Wire Scanner System for the European Xfel and Its Impact on Safety Systems

FEL, operation, timing, software

1289

T. Lensch, T. Wamsat
DESY, Hamburg, Germany

The European-XFEL is an X-ray Free Electron Laser facility located in Hamburg (Germany). The 17.5 GeV superconducting accelerator will provide photons simultaneously to several user stations. Currently 12 Wire Scanner stations are used to image transverse beam profiles in the high energy sections. These scanners provide a slow scan mode for single bunch operation. When operating with long bunch trains (>100 bunches) fast scans are used to measure beam sizes in an almost nondestructive manner. To operate fast scans multiple impacts on the beam loss system (BLM) and the charge transmission interlock (TIS) have to be taken into account. This paper focuses on the interaction between these systems and first experiences performing measurements.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA086

About •

paper received ※ 02 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA099

XLEAP-II Motion Control

controls, undulator, wiggler, feedback

1325

M.A. Montironi, H. Bassan, M.A. Carrasco, E.M. Kraft, A. Marinelli
SLAC, Menlo Park, California, USA

The XLEAP project was conceived with the main scope of extending the generation of ultrashort pulses at LCLS to the sub-femtosecond (sub-fs) regime. As the project produced the expected results, an upgrade called XLEAP-II is being designed to provide the same functionality to LCLS-II. The XLEAP project utilized one variable gap wiggler to produce sub-fs X-ray pulses. The upgrade will involve four additional wigglers in the form of repurposed LCLS fixed gap undulators mounted on translation stages. This paper describes the design of the hardware and software architecture utilized in the motion control system of the wigglers. First it discusses how the variable gap wiggler was upgraded to be controlled by an Aerotech Ensemble motion controller through an EPICS Soft IOC (input-output controller). Then the motion control strategy for the additional four wigglers, also based around Aerotech controllers driving servomotors, is presented. Lessons learned from operating the wiggler and undulators during LCLS operation are discussed and utilized as a base upon which the upgraded motion control system is designed and built. Novel challenges are also identified and mitigations are discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA099

About •

paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA113

EPICS Maintenance Tools and Practices at FRIB’s Diagnostics Department

diagnostics, controls, EPICS, operation

1356

D.O. Omitto, S. Cogan, B.S. Martins
FRIB, East Lansing, Michigan, USA

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.
The Beam Instrumentation and Measurements department is responsible for dozens of different diagnostics devices deployed at multiple locations at the Facility for Rare Isotope Beam. In order to manage such a high number of devices, different tools were created to address preventive and corrective maintenance tasks and check the overall health of the equipment. This work will present how the EPICS tools and frameworks, such as archiver, channel finder, and pyDevSup, were integrated with our environment to help achieve a high availability for the beam diagnostic devices.

Poster WEPHA113 [0.573 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA113

About •

paper received ※ 30 September 2019 paper accepted ※ 20 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA138

Orbit Correction With Machine Learning Techniques at the Synchrotron Light Source DELTA

network, storage-ring, controls, synchrotron

1426

D. Schirmer
DELTA, Dortmund, Germany

In the last years, artificial intelligence (AI) has experienced a renaissance in many fields. AI-based concepts are nature-inspired and can also be used in the field of accelerator controls. At DELTA, various studies on this subject were conducted in the past. Among other possible applications, the use of neural networks for automated correction of the electron beam position (orbit control) is of interest. Machine learning (ML) simulations with a DELTA storage ring model were already successful. Recently, conventional Feed-Forward Neural Networks (FFNN) were trained on measured orbits to apply local and global beam position corrections to the 1.5 GeV storage ring DELTA. First experimental results are presented and compared with other orbit control methods.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA138

About •

paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA161

Revisiting the Bunch-Synchronized Data Acquisition System for the European XFEL Accelerator

controls, FEL, data-acquisition, interface

1460

T. Wilksen, A. Aghababyan, L. Fröhlich, O. Hensler, R. Kammering, K. Rehlich, V. Rybnikov
DESY, Hamburg, Germany

After about two years in operation the bunch-synchronized data acquisition as used with the accelerator control system at the European XFEL is being revisited and reevaluated. As we have now gained quite some experience with the current system design it was found to have shortfalls specifically with respect to the offered methods for data retrieval and management. In the context of modern data collection and management technologies readily in use by huge internet companies, new frameworks are being evaluated as a control-system independent replacement for data reduction, processing and online analysis. The main focus here is currently put on streaming technologies. Different approaches are being discussed in this paper and reviewed for feasibility and adaptability for control system architectures used at DESY’s accelerator facilities.

Poster WEPHA161 [2.687 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA161

About •

paper received ※ 27 September 2019 paper accepted ※ 20 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WESH3002

Control System for Fast Components of Electron Beam Welding Machines

controls, EPICS, real-time, experiment

1516

A.V. Gerasev, P.B. Cheblakov
BINP SB RAS, Novosibirsk, Russia

Modern electron beam machines for different applications including welding, additive technologies and etc. consist of many different subsystems, which should be controlled and monitored. They could be divided by so-called fast and slow subsystems. Slow subsystems allow reaction time to be around couple of seconds that can be implemented using PC. Fast subsystems require time to be around hundreds of microseconds combined with flexible logic. We present an implementation of such fast system for mechanical moving platform and electron beam control. The core of this system is single board computer Raspberry Pi. We employed a technique of fast waveform generation using Raspberry Pi on-chip DMA to manipulate stepper motors. Raspberry Pi was equipped by external CAN controller to operate an electron beam via CAN DACs. Special software was developed including libraries for low- and high-level technical process control written in C and Rust; and in-browser graphical user interface over HTTP and WebSockets. Finally, we assembled our hardware inside standard 19-inch rack mount chassis and integrated our system inside experimental electron beam machine infrastructure.

Poster WESH3002 [6.479 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WESH3002

About •

paper received ※ 02 October 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WESH4002

A PyDM User Interface for an LCLS Simulator

interface, controls, linac, klystron

1525

M.L. Gibbs, W.S. Colocho, A. Osman, J. Shtalenkova, H.H. Slepicka
SLAC, Menlo Park, California, USA

PyDM (Python Display Manager) is a framework for building control system user interfaces. A user interface for the LCLS (Linac Coherent Light Source) simulator has been built in PyDM. The simulator interface gives a realistic experience of operating many parts of the LCLS accelerator, and can be used for training new accelerator operators on routine tasks. This interface also provides a good demonstration of the experience of using PyDM in a real-world environment.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WESH4002

About •

paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THAPP05

Overview of Acquisition and Control Electronics and Concepts for Experiments and Beam Transport at the European XFEL

PLC, controls, interface, FEL

1554

P. Gessler, H. Ali, F. Babies, K.-E. Ballak, H. Bamaga, B. Baranasic, O. Bieler, N. Coppola, K. Dornack, J. Eilers, D. Emes, B. Fernandes, M. Fobian, T. Freyermuth, S.T. Huynh, N. Jardón Bueno, M. Meyer, O. Oshtuk, P. Parlicki, J. Reifschläger, S. Sayar, H. Sotoudi Namin, M. Stupar, J. Tolkiehn, H. Vega Perez, S. Wagner, J. Zach
EuXFEL, Schenefeld, Germany

FPGA based fast electronics to acquire and pre-process signals of detectors and diagnostics and PLC based hardware and software for motion, vacuum and other control and monitoring applications are key elements of the European X-Ray Free Electron Laser. In order to bring the newly developed scientific user facility up and running, the underlying electrical and electronic components require a diverse array of tools and processes to be developed in order to meet the continually adapting requirements and make use of technological advances. Many challenges were faced, including high availability and up-time, adaptability to a dynamic environment, rapid lead-time for integration of complex components, numerous instrumentation installations and commissioning, high time resolution and subsequently, high demands on data and sampling rates, synchronization and real-time processing. In this contribution we will provide an overview of the selected technologies, developed concepts and solutions along with generically designed frameworks and tools, which aim to provide a high degree of standardization on the control systems and even automatic generation from requirements to final install.

Slides THAPP05 [13.323 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THAPP05

About •

paper received ※ 30 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THCPR03

A Safety Rated FPGA Framework for Fast Safety Systems

FPGA, PLC, hardware, diagnostics

1626

F. Tao, B.M. Bennett, D.G. Brown, J. Jones, M.W. Stettler
SLAC, Menlo Park, California, USA

In this paper, we will introduce a generic safety-rated FPGA design template. FMEDA analysis, hardware reliability modeling, firmware development, verification and validation will be described in details to demonstrate the IEC 61508 compliant development process. In this dual redundant design, each chain consists a FPGA chip from different manufacturers to minimize the potential common cause failures. Cross checks between FPGAs and end-to-end self-checks are performed to increase the diagnostic coverage and improve the reliability. Based on this safety FPGA template, an Average Current Monitor (ACM) system is developed at SLAC with the addition of a safety PLC for diagnostics and a HMI for user interface. The overall system is deployed as part of Beam Containment System (BCS) to limit the beam current with the target Safety Integrity Level (SIL) 2.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THCPR03

About •

paper received ※ 01 October 2019 paper accepted ※ 08 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THCPR04

The European XFEL Beam Loss Monitor System

FEL, high-voltage, undulator, controls

1630

T. Wamsat, T. Lensch
DESY, Hamburg, Germany

The European XFEL MTCA based Beam Loss Monitor (BLM) System is composed of about 470 BLMs, which are part of the Machine Protection System (MPS). The BLMs detect losses of the electron beam, in order to protect accelerator components from damage and excessive activation, in particular the undulators, since they are made of permanent magnets. Also each cold accelerating module is equipped with a BLM to measure the sudden onset of field emission (dark current) in cavities. In addition some BLMs are used as detectors for wire- scanners. Further firmware and server developments related to alarm generation and handling are ongoing. The BLM systems structure, the current status and the different possibilities to trigger alarms which stop the electron beam will be presented.

Slides THCPR04 [7.156 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THCPR04

About •

paper received ※ 02 October 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THCPR07

Electronics for LCLS-II Beam Containment System Loss Monitors

electronics, controls, PLC, radiation

1641

R.A. Kadyrov, C.I. Clarke, A.S. Fisher, M. Petree, C. Yee
SLAC, Menlo Park, California, USA

LCLS-II is a new FEL which is under construction at SLAC National Accelerator Laboratory. Its superconducting electron linac is able to produce up to 1.2 MW of beam power. In event of electron beam loss, radiation levels can exceed allowed levels outside thin shielding originally built for a lower energy LCLS linac. Beam Containment System (BCS) loss monitors are employed to detect the radiation and shut-off the beam within 200 µs, limit the radiation dose in occupied areas and minimize damage to the equipment. sCVD single-crystal diamond particle detectors are used as Point Beam Loss Monitors (PBLM) to detect losses locally. Fiber optics is selected as Long Beam Loss Monitor (LBLM). PMT at downstream end of the LBLM detects light produced by Cherenkov radiation. LBLM provides continuous coverage along electron beam path from the gun to the dump. Unified set of electronics is designed to integrate the charge from PMT or sCVD, compare the loss with predefined threshold and generate the fault if the limit is breached. Continuous self-checking is implemented for both types of sensors. Challenges in electronics design, cable selection and self-checking implementation are discussed.

Slides THCPR07 [1.204 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THCPR07

About •

paper received ※ 27 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THCPR08

SPIRAL2 Machine Protection System Status Report

controls, PLC, software, interface

1645

C.H. Patard, C. Berthe, F. Bucaille, G. Duteil, P. Gillette, E. Lécorché, G. Normand, J.-F. Rozé, Q. Tura
GANIL, Caen, France

The phase 1 of the SPIRAL2 facility, the extension project of the GANIL laboratory in Caen, France, is to be commissioned. The accelerator, composed of a normal conducting RFQ and a superconducting linac, is designed to accelerate high power deuteron and heavy ion beams up to 200 kW. A Machine Protection System (MPS) has been implemented to protect the accelerator from thermal damages for this very large range of beam intensities. This paper presents the solutions chosen for this system, composed of three subsystems: one dedicated to thermal protection which requires a PLC and a fast electronic system, a second one dedicated to enlarged safety protection, and a third safety subsystem dedicated to fast vacuum valve protection. Both of those subsystems work associated with a global EPICS-based control and HMI system, which gives the operation team global supervision of the accelerator and allows controlling sensor trigger thresholds, interlock system, beam initialization and power increase through the beam time structure. The MPS has been developed and is currently tested to be ready for the incoming SPIRAL2 commissioning.

Slides THCPR08 [3.758 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-THCPR08

About •

paper received ※ 24 September 2019 paper accepted ※ 11 October 2019 issue date ※ 30 August 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)