Keyword: software
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TUPAL001 Solvement of the Asynchronization Between the BPMs and Corrector Power Supplies During Orbit Correction in RCS of CSNS power-supply, MMI, neutron, proton 1008
 
  • M.T. Li
    CSNS, Guangdong Province, People's Republic of China
  • Y.W. An, M.Y. Huang
    IHEP, Beijing, People's Republic of China
  
  This paper proposes a new possible method to re-synchronize the BPM COD data and Corrector Supplies' data during orbit correction in RCS AC-mode beam commis-sioning of CSNS. This method is promising to improve the effect of the obit correction.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-TUPAL001  
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WEPAF003 Beamline Architect interface, simulation, quadrupole, solenoid 1812
 
  • J.D. Kunz, C.M. Conrad, L.M. Romero
    Anderson University, Anderson, USA
  
  Funding: Indiana Space Grant Fellowship Program 2015-2018, subaward number 4103-82252
Beamline Architect is a new particle accelerator simulation tool. Currently, two of the most widely used tools in this field are G4beamline and COSY Infinity. While these codes are fast and quite accurate, sometimes their interfaces can be time-consuming for students to learn, particularly undergraduate students or students whose primary field is not accelerator physics. Without Beamline Architect, each code has its own high-level language that must be manually written into a file and then executed on the command line. Moreover, sometimes the use of both simulation tools is warranted in order to check for consistency between the codes. Writing the codes by hand or translating between software can sometimes be cumbersome, even for experts. Furthermore, knowledge of an additional language, such as Python, is required in order to analyze the outputs of the codes (which may be in different formats from one another). Beamline Architect is a tool that provides a graphical user interface to G4beamline and COSY Infinity. This lets the user build a particle accelerator channel in 3D with or without using code. The channel may then be saved, exported, translated, or run. Any output data will be plotted in Beamline Architect using Python, since it is both flexible aesthetically and quite standard in the particle accelerator community. For undergraduate and non-accelerator students, Beamline Architect allows a hands-on experience with accelerator simulations. Some applications for these students include health physics radiation dosimetry problems, medical imaging mechanics, security scanner simulations, and (of course) accelerator channel design for particle physics experiments. For experts, Beamline Architect provides visual confirmation of the channel and a faster, more consistent way of cross-referencing results between the codes. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAF003  
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WEPAF030 HEPS High-Level Software Architecture Plan database, controls, EPICS, operation 1884
 
  • C.P. Chu, Y.S. Qiao, C.H. Wang
    IHEP, Beijing, People's Republic of China
  • H.H. Lv
    SINAP, Shanghai, People's Republic of China
  
  Funding: Work supported by the Chinese Academy of Science and the HEPS-TF Project.
The High Energy Photon Source (HEPS) is a planned ultra-low emittance synchrotron radiation based light source which requires high precession control systems for both accelerator and beamlines. Such kind of accelerators will require extremely sophisticated high-level control software for both accelerator and beamline operation to achieve not only the demanded precision but also high reliability. This paper outlines the high-level application software architecture design including relational data-bases, software platforms, and advanced controls with machine learning (ML) techniques. Early plan for beam-line control is also reported. For better quality control and easy maintenance, the high-level applications will be built upon matured software platforms. Also, the HEPS High-Level Software team will collaborate with EPICS community for improving the software platforms. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAF030  
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WEPAF044 Automatic Tuning of PETRA, its Injector Complex, and Prospects of Autonomous Operation of PETRA IV controls, operation, optics, synchrotron 1912
 
  • I.V. Agapov, H. Ehrlichmann, J. Keil, G.K. Sahoo, R. Wanzenberg
    DESY, Hamburg, Germany
  • Y.-C. Chae
    ANL, Argonne, Illinois, USA
  
  We present the progress in tuning automation of the PETRA injection complex. The OCELOT optimizer has been ported to the PETRA control system and proof-of-principle tests of transmission efficiency optimization done. We further argue that the next steps in tuning and automation are impossible without rethinking the architecture of the high level contol system. A possible approach to the new system is then sketched.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAF044  
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WEPAF056 A Graphical User Interface for Transverse Bunch-by-Bunch Feedback at SPEAR3 feedback, interface, impedance, kicker 1951
 
  • K. Tian, W.J. Corbett, D.J. Martin, J.J. Sebek
    SLAC, Menlo Park, California, USA
  • Q. Lin
    Donghua University, Shanghai, People's Republic of China
  • D. Teytelman
    Dimtel, San Jose, USA
  
  Recently a transverse bunch-by-bunch feedback kicker was installed in SPEAR3 to control beam instabilities, remove unwanted satellite bunches and test resonant bunch excitation schemes for short pulse x-ray production. In conjunction with DIMTEL processing electronics, the feedback system can successfully stabilize undesirable beam modes and opens up the potential for more advanced investigations of bunch-by-bunch beam dynamics. To streamline the process, a graphical user interface was developed that allows the user to 'script' beam physics measurements from a single panel. At the press of a button the panel automatically downloads the measurement parameters, acquires the raw data and provides graphical displays of the beam response with calculated metadata. In this paper we present the interface format and examples of automated measurements.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAF056  
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WEPAF064 Dependable Implementation of the Beam Interlock Mechanism in CERN Power Converter Controllers controls, operation, experiment, interface 1975
 
  • M. Di Cosmo, Q. King, R. Murillo-Garcia, D. Nisbet, B. Todd
    CERN, Geneva, Switzerland
  
  At CERN a Beam Interlock System (BIS) protects accelerators from accidental and uncontrolled release of beam energy, avoiding machine downtime. Throughout the accelerator complex numerous critical subsystems, including power converters, interact with the BIS indicating their readiness for operation with beam. Power converters play a vital role in establishing operational conditions, and an unmitigated power converter malfunction could lead to damage to the machine. For example a bending magnet converter set at an incorrect current would result in an incorrect field strength, and beam passing through this may impact and damage the machine. A fast and dependable Beam Interlock Mechanism is required between power converters and BIS, verifying that voltage and current levels are within tolerances. This paper describes the design and realisation of the Beam Interlock Mechanism, based on CERN's Function Generator Controller (FGC), the central processing unit power converter control. Particular emphasis is placed on the system architecture required to assure the integrity of the power converter parameters, and the protection of the CERN accelerator complex.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAF064  
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WEPAF076 Availability Studies Comparing Drive Beam and Klystron Options for the Compact Linear Collider klystron, operation, simulation, linac 2013
 
  • O. Rey Orozko, S. Döbert, M. Jonker
    CERN, Geneva, Switzerland
  
  The initial proposal for the Compact Linear Collider (CLIC) is based on a two beam-scheme to accelerate the main colliding beams. For low collision energies, the main beam could also be accelerated by powering the accelerating structures with klystrons instead of the two-beam scheme. This paper studies the feasibility of this new alternative in terms of machine availability. An implemented bottom-up availability model considers the components failure modes to estimate the overall availability of the system. The model is defined within a Common Input Format scheme and the AvailSim3 software package is used for availability simulations. This paper gives an overview of the systems affecting the beam powering availability and makes recommendations for availability improvements.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAF076  
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WEPAK014 A New Pulse Magnet Control System in the KEK Electron Positron LINAC controls, power-supply, EPICS, timing 2121
 
  • Y. Enomoto, K. Furukawa, T. Natsui, M. Satoh
    KEK, Ibaraki, Japan
  • H.S. Saotome
    Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan
  
  In 2017, sixty-four pules magnets were installed in the KEK e+/e− LINAC for simultaneous injection to four different rings. Since each ring requires different injection energy, magnetic field in the LINAC has to be changed shot by shot (every 20 ms) according to the destination of the beam. To realize such operation, a PXI express based new control system was installed. Each unit, which consists of an event receiver board, a DAC board, and a ADC board, can set and monitor output current up to 8 pulsed power supply in 16 bit resolution. The timing and control system are integrated in that of the LINAC by using Micro-Research Finland's PXI event receiver board. In terms of software, Windows 8.1 and LabVIEW 2016 were mainly adopted to control the hardware. EPICS channel access (CA) protocol was used to communicate with operator's interface panels. In addition to real-time monitoring by EPICS CA and logging by CSS archiver every 10 s, data are logged every shot (every 20 ms) in the text file together with timestamp, shot ID and destination. At present, thirteen units are stably in operation to control 64 magnets. Further installation of the system is planned in 2018.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAK014  
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WEPAK015 Beam Gate Control System for SuperKEKB controls, injection, operation, hardware 2124
 
  • H. Kaji, Y. Ohnishi, S. Sasaki, M. Satoh, H. Sugimura
    KEK, Ibaraki, Japan
  • Y. Iitsuka
    EJIT, Hitachi, Ibaraki, Japan
  • T. Kudou
    Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
  
  The electron beam pulses of injector linac for the SuperKEKB collider are enabled and disabled by Beam Gate control system. This system controls the delivery of triggers to the electron guns at the injector. Also, the septum and kicker magnets for injection point of main ring are controlled with this Beam Gate to avoid unnecessary operation and to prolong their lifetime. The Beam Gate synchronizes the enabling and disabling operations of these hardware even though they are about 1km distant. Besides, from the phase-2 operation, the kicker and septum magnets for newly constructed damping ring becomes controlled apparatus of this system. We develop the new Beam Gate control system with the Event Timing System network*. The new system improves the unsatisfied performance of Beam Gate in the phase-1 operation and realizes the complicated control for phase-2. The advantages of new system are: the control signal is delivered via Event nettork, so that we do not need to cable new network. The enabling and disabling operations for distant hardware are surely synchronized by the Event Timing System.
* H. Kaji et al., "Construction and Commissioning Event Timing System at SuperKEKB", Proceedings of IPAC14, Dresden, Germany (2014). 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAK015  
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WEPAL003 Baseband Simulation Model of the Vector RF Voltage Control System for the J-PARC RCS controls, feedback, simulation, cavity 2144
 
  • F. Tamura, M. Nomura, T. Shimada, M. Yamamoto
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • M. Furusawa, K. Hara, K. Hasegawa, C. Ohmori, Y. Sugiyama, M. Yoshii
    KEK, Tokai, Ibaraki, Japan
  
  Vector rf voltage feedback control for the wideband magnetic alloy cavity of the J-PARC RCS is considered to be employed to compensate the heavy beam loading caused by high intensity proton beams. A prototype system of multiharmonic rf vector voltage control has been developed and is under testing. To characterize the system performance, full rf simulations could be performed by software like Simulink, while the software is proprietary and expensive. Also, it requires much computing power and time. We performed the simplified baseband simulations of the system in z-domain by using free software, Scilab and Python control library. It seems to be beneficial for searching the parameters that the baseband simulation can be performed quickly. In this presentation, we present the setup and results of the simulations. The simulations well reproduce the open and closed loop responses of the prototype system.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAL003  
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WEPAL043 Distributed Control Architecture for an Integrated Accelerator and Experimental System controls, FPGA, hardware, real-time 2268
 
  • D.J. Gibson, R.A. Marsh, B. Rusnak
    LLNL, Livermore, California, USA
  
  Funding: This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
A neutron imaging demonstration system is under construction at LLNL, integrating 4 MeV and 7 MeV deuteron accelerators with gas-based neutron production target the associated supply and return systems. This requires integrating a wide variety of control points from different rooms and floors of the Livermore accelerator facility at a single operator station. The control system adopted by the commercial vendor of the accelerators relies on the National Instruments cRIO platform, so that hardware system has been extended across all the beamline and experimental components. Here we present the unified, class-based framework that has been developed and implemented to connect the operator station through the deployed Real Time processors and FPGA interfaces to the hardware on the floor. Connection between the deployed processors and the operator workstations is via a standard TCP/IP network and relies on a publish/subscribe model for data distribution. This measurement and control framework has been designed to be extensible as additional control points are added, and to enable comprehensive, controllable logging of shot-correlated data at up to 300 Hz. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPAL043  
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WEPMF001 Upgrade of the ALBA Magnetic Laboratory for Measuring LIPAc HEBT Quadrupoles and Dipole controls, quadrupole, hardware, dipole 2369
 
  • J. Campmany, F. Becheri, L.G.O. Garcia-Orta, J. Marcos, V. Massana, R. Petrocelli
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  • B. Brañas, J. Castellanos
    CIEMAT, Madrid, Spain
  
  Along 2017 ALBA magnetic measurements facility has measured LIPAc HEBT quadrupoles and dipole designed by CIEMAT and built by ELYTT company. ALBA magnetic measurements laboratory has been improved through an upgrade program of its measurement benches to complete their measurements. One of the main aims of the upgrade has been to standardize both the hardware and software and therefore ensure an easy maintenance. Especially relevant has been the upgrade of the flipping coil bench, in which the DC motors and the obsolete controller have been replaced by step-motors and ICEPAP controller. Also, software has been migrated to Tango package. Hardware and software of Hall probe bench has been upgraded as well, using the last DeltaTau motion controller. Tango has been upgraded too, using Devian 8 as operative system. Next step will be the upgrade of the rotating coil hardware and software using also step-motor and ICEPAP controller. In parallel, new shafts have been build and tested, with specific designs to improve the sensitivity and minimize the noise to signal ratio. In this contribution we detail the upgrades and the results of performance tests.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-WEPMF001  
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THPAF045 Performance Optimisation of Turn-by-Turn Beam Position Monitor Data Harmonic Analysis betatron, optics, lattice, electron 3064
 
  • L. Malina, J.M. Coello de Portugal, J. Dilly, P.K. Skowroński, R. Tomás, M.S. Toplis
    CERN, Geneva, Switzerland
  • J.M. Coello de Portugal
    UPC, Barcelona, Spain
  
  Nowadays, turn-by-turn beam position monitor data is increasingly utilized in many accelerators, as it allows for fast and simultaneous measurement of various optics parameters. The accurate harmonic analysis of turn-by-turn data costs beam time when needed online. Generally, the electronic noise is avoided by cleaning of the data based on singular value decomposition. In this paper, we exploit the cleaning procedure to compress the data for the harmonic analysis. This way the harmonic analysis is sped up by an order of magnitude. The impact on measurement accuracy is discussed.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAF045  
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THPAF064 Beam Dynamics with Covariant Hamiltonians space-charge, multipole, octupole, wakefield 3123
 
  • B.T. Folsom, E. Laface
    ESS, Lund, Sweden
  
  We demonstrate covariant beam-physics simulation through multipole magnets using Hamiltonians relying on canonical momentum. Space-charge integration using the Lienard–Wiechert potentials is also discussed. This method is compared with conventional nonlinear Lie-operator tracking and the TraceWin software package.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAF064  
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THPAF076 Using Graphic-Turtle with the Particle Beam Optics Laboratory (PBO Lab) optics, simulation, scattering, quadrupole 3158
 
  • G.H. Gillespie
    G.H. Gillespie Associates, Inc., Del Mar, California, USA
  
  A Particle Beam Optics Laboratory (PBO Lab) module has been developed for the Paul Scherrer Institute (PSI) version of the TURTLE program commonly known as Graphic-Turtle. The PSI-TURTLE version extends the original TURTLE program by including several unique beam optics capabilities, as well as by providing a self-contained graphics package. The unique optics modeling, together with the data visualization enhancements, make the PSI-TURTLE program ideal for certain types of beam simulations. The PBO Lab environment provides a single graphic user interface (GUI) that features an easy-to-learn and easy-to-use drag-and-drop beamline construction kit. Underlying the GUI is a sophisticated object model developed specifically for the accelerator community. PBO Lab provides a common interface for multiple charged particle optics codes. Modules have been developed for a number of popular beam optics programs that cover a range of accelerator types and applications. The PSI-TURTLE Module extends those capabilities. The module is described and its main capabilities and limitations are summarized.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAF076  
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THPAK018 Recent Developments in DEMIRCI for RFQ Design rfq, simulation, multipole, cavity 3243
 
  • E. Celebi
    IBU, Istanbul, Turkey
  • O. Cakir, G. Turemen
    Ankara University, Faculty of Sciences, Ankara, Turkey
  • G. Turemen
    TAEK, Ankara, Turkey
  • G. Unel
    UCI, Irvine, California, USA
  
  Funding: This project has been supported by TUBITAK with project number 114F106 and 117F143.
DEMIRCI software aims to aid RFQ design efforts by making the process easy, fast and accurate. In this report, DEMIRCI 8-term potential results are compared with the results provided by other commercially available simulation software. Computed electric fields are compared to the re- sults from simulations of a recently produced 352 MHz RFQ. Recent developments like the inclusion of space charge ef- fects in DEMIRCI beam dynamics are also discussed. More- over, further terms are added to 8-term potential to simulate possible vane production errors. The FEM solver was also improved to mesh the cells with errors. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK018  
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THPAK085 3D Space Charge in Bmad space-charge, simulation, lattice, brightness 3428
 
  • C.E. Mayes
    SLAC, Menlo Park, California, USA
  • R.D. Ryne
    LBNL, Berkeley, California, USA
  • D. Sagan
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  
  We present a parallel fast Fourier transform based 3D space charge software library based on integrated Green functions. The library is open-source, and has been structured to easily be used by existing beam dynamics codes. We demonstrate this by incorporating it with the Bmad toolkit for charged particle simulation, and compare with analytical formulas and well-established space charge codes.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK085  
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THPAK087 Software-Computing System for Numerical Modelling of Beam Dynamics in Accelerators experiment, controls, interface, simulation 3435
 
  • E. Krushinevskii, E. Sboeva
    Saint Petersburg State University, Saint Petersburg, Russia
  • S.N. Andrianov, A.N. Ivanov, N.V. Kulabukhova
    St. Petersburg State University, St. Petersburg, Russia
  
  The spectrum of software packages for the physics of charged particles beams is extremely wide. From most popular and effective systems can be allocated such programs as COSY Infinity, MAD X, MARYLIE, TRANSPORT. Heterogeneous individual formats of input and output data, the lack of a common and user-friendly interface and the narrow specialization of these programs poses a number of challenges for the modern researchers. It significantly reduces the effectiveness and quality of corresponding computational experiments. In this article we present a universal tool for automation and acceleration of computing experiments. The authors consider a method for developing the concept and prototype of a corresponding software package that would combine the advantages of existing (non-commercial) systems. This software will be able to unify the input and output data format for certain programs, visualize the information in various ways, provide reference and training information for "beginners". The results obtained within the developed framework will be a significant contribution both to the development of numerical and symbolical methods for solving evolution nonlinear equations.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK087  
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THPAK114 Evaluation of an Interior Point Method Specialized in Solving Constrained Convex Optimization Problems for Orbit Correction at the Electron Storage Ring at DELTA feedback, storage-ring, electron, closed-orbit 3507
 
  • S. Koetter, A. Glaßl, B.D. Isbarn, D. Rohde, M. Sommer, T. Weis
    DELTA, Dortmund, Germany
  
  The slow orbit feedback at the electron storage ring at DELTA will be upgraded with new software. Finding a set of dipole-field-strength variations which minimize the deviation of the orbit from a reference orbit requires solving a convex optimization problem subject to inequality constraints. This work focuses on exploiting properties of a special type of interior point methods, which can solve this problem, for orbit correction at DELTA. After comparing runtimes of an interior point method to a Newton-like optimization algorithm, the performance of the new slow-orbit-feedback software is assessed based on measurement results.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK114  
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THPAK134 Dynamic Equations: The Matrix Representation of Beam Dynamic Equations Instead of Tensor Description controls, sextupole, operation, octupole 3554
 
  • S.N. Andrianov, A.N. Ivanov, N.V. Kulabukhova
    St. Petersburg State University, St. Petersburg, Russia
  • Chang, S. Chang
    KAIST, Daejeon, Republic of Korea
  • J. Choi
    CAPP/IBS, Daejeon, Republic of Korea
  • E. Krushinevskii, E. Sboeva
    Saint Petersburg State University, Saint Petersburg, Russia
  
  In this paper we consider mathematical and computer modeling of nonlinear dynamics of particle beams in cyclic accelerators in terms of the matrix representation of the corresponding nonlinear differential equations. The proposed approach is different from the usual presentations of non-linear equations in the form of Taylor series. In the paper, we use the coefficients representation in the form of two-dimensional matrices. The similar approach allows us not only to significantly reduce the time spent on modeling beam dynamics but use symbolic mathematics to calculate the necessary two-dimensional matrices. This method demonstrates the effectiveness when solving problems of dynamics problems and optimization of control systems, and for evaluating the influence of various effects on the dynamics of the beam (including taking into account the spin). Using the tools of symbolic computations not only significantly increases the computational efficiency of the method, but also allows you to create databases of "ready-made" transformations (Lego-objects), which greatly simplify the process of modeling particle dynamics. Examples of solving practical problems are given.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK134  
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THPAL062 The New 20 kA 80 V Power Supply for the 520 MeV H− Cyclotron at TRIUMF controls, power-supply, TRIUMF, electronics 3792
 
  • S. Carrozza, L. Bondesan, A. Morato, M.P. Pretelli, G.T. Taddia
    OCEM, Valsamoggia, Italy
  • M.C. Bastos, J.-P. Burnet, G. Hudson, Q. King, G. Le Godec, O. Michels
    CERN, Geneva, Switzerland
  • Y. Bylinskii, A.C.M. Leung, W. L. Louie, F. Mammarella, R.B. Nussbaumer, C. Valencia
    TRIUMF, Vancouver, Canada
  
  The new 20 kA, 80 V power supply for the main magnet of the 520 MeV H− Cyclotron at TRIUMF was awarded to OCEM. It has replaced the original system (commissioned in 1976) based on a series pass regulator. The final acceptance tests have demonstrated the com-pliance with the project specifications, especially for the high current stability required for the Cyclotron operation. The current stability is ±5 ppm, including current ripple, for a period of more than 8 hours of continuous operation. In addition, the magnetic field can be further stabilized us-ing feedback of a flux loop signal. OCEM designed the power supply to use the third gen-eration of Function Generator/Controller (FGC3) control electronics from CERN. This was chosen to obtain the high current stability required by TRIUMF. This collaboration was facilitated through a Knowledge Transfer agreement between CERN and OCEM. The power supply commis-sioning has been performed as a collaboration between OCEM, TRIUMF and CERN. This paper describes the topology of the power supply, the control electronics, the high-precision current measure-ment system and the associated software as well as the commissioning results carried out with the magnet.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAL062  
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THPAL150 Development of Tsinghua X-Band High Power Test Facility klystron, controls, vacuum, GUI 3999
 
  • M.M. Peng, D.Z. Cao, W. Gai, Y.L. Jiang, J. Liu, J. Shi, P. Wang
    TUB, Beijing, People's Republic of China
  
  The X band high power test facility consists of a 11.424 GHz, 50 MW CPI klystron and a ScandiNova pulse modulator at Tsinghua University has been built since Sept 2017 and the output RF power has reached 60 MW with 200 ns pulse width at a repetition frequency of 10. The klystron output RF pulse will eventually be 50 MW at a 1.5 μs. A group of cylinder pulse compressor will be installed. High gradient accelerating structures for research and TTX will be tested on this facility.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAL150  
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THPML028 Genetic Algorithms for Machine Optimization in the Fair Control System Environment controls, ion-source, framework, dipole 4712
 
  • W. Geithner, Z. Andelkovic, S. Appel, O. Geithner, F. Herfurth, S. Reimann, G. Vorobjev
    GSI, Darmstadt, Germany
  • F. Wilhelmstötter
    emarsys, Vienna, Austria
  
  Due to the massive parallel operation modes at the GSI accelerators, a lot of accelerator setup and re-adjustment have to be made by the operators during a beam time. With the FAIR project the complexity of the accelerator facility increases furthermore and for efficiency reasons it is recommended to establish a high level of automation for future operation. The PEP (parameter evolution project) has been launched at GSI operations group in 2017 to investigate the potential of a settings optimization using evolutionary Algorithms. The working proof of principle has already been tested at the Cryring injector. The latest improvements and the further Development of the Parameter Evolution Project will be shown.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML028  
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THPML060 Virtual VELA-CLARA: The Development of a Virtual Accelerator simulation, controls, EPICS, lattice 4773
 
  • T.J. Price, H.M. Castaneda Cortes, D.J. Dunning, J.K. Jones, B.D. Muratori, D.J. Scott, B.J.A. Shepherd, P.H. Williams
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • R.F. Clarke, G. Cox
    STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
  
  A Virtual Accelerator (VA) has been developed to mimic the accelerators Versatile Electron Linear Accelerator (VELA) and Compact Linear Accelerator for Research and Applications (CLARA). Its purpose is to test control room applications, run start-to-end simulations with multiple simulation codes, accurately reproduce measured beam properties, conduct 'virtual experiments'and gain insight into ‘hidden beam parameters'. This paper gives an overview into the current progress in constructing this VA, detailing the areas of: developing a 'Virtual EPICS' control system, using multiple simulation codes (both particle tracking and analytic), the development of a ‘Master Lattice' and the construction of a Python interface in which to run the VA.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML060  
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THPML069 The Control System Design of SCLF controls, interface, network, data-acquisition 4800
 
  • Y.B. Yan, J.G. Ding, G.Y. Jiang, Y.B. Leng
    SSRF, Shanghai, People's Republic of China
  • J.F. Chen
    SINAP, Shanghai, People's Republic of China
  
  The high-gain free electron lasers have given scientists hopes for new scientific discoveries in many frontier research areas. The Shanghai Coherent Light Facility (SCLF) was proposed by the central government of China on April 2017, which is a quasi-continuous wave hard X-ray free electron laser facility. The control system is responsible for the facility-wide device control, data acquisition, machine protection, high level database or application, as well as network and computing platform. It will be mainly based on EPICS to reach the balance between the high performance and costs of maintenance. The latest technology will be adopted for the high repetition rate data acquisition and feedback system. The details of the control system design will be reported in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML069  
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THPML071 Upgrade of Digital BPM Processor at DCLS and SXFEL FEL, cavity, EPICS, FPGA 4807
 
  • L.W. Lai, F.Z. Chen, Y.B. Leng, T. Wu, Y.B. Yan
    SSRF, Shanghai, People's Republic of China
  • J. Chen
    SINAP, Shanghai, People's Republic of China
  
  A digital BPM processor has been developed at 2016 in SINAP for DCLS and SXFEL, which are FEL facilities built in China. The stripline BPM and cavity BPM processors share the same hardware platform and firmware, but the processing algorithms implemented in EPICS IOC on the ARM CPU are different. The capability of the ARM limits the processing speed to 10 bunches per second. Now the bunch rate of DCLS and SXFEL are going to increase from 10Hz to 50Hz. To meet the higher processing speed requirements, the processor firmware and software are upgraded in 2017. All BPM signal processing algorithms are implemented in FPGA, and EPICS IOC reads results only. After the upgrade, the processing speed reach 120 bunches per second. And this is also a good preparation for future Shanghai Hard-X ray FEL, which bunch rate is about 1MHz.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML071  
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THPML075 MYRRHA Control System Development controls, interface, GUI, framework 4823
 
  • R. Modic, M. Pavleski, T. Zagar
    Cosylab, Ljubljana, Slovenia
  • J. Belmans, P. Della Faille, D. Vandeplassche
    Studiecentrum voor Kernenergie - Centre d'Étude de l'énergie Nucléaire (SCK•CEN), Mol, Belgium
  
  MYRRHA ADS (Accelerator Driven System), the prototype of a nuclear reactor driven by a particle accelerator, is being realized through a staged approach. This paper will explore the Control System (CS) strategy for the current stage of the accelerator R&D, where the goal is injector for the energies up to 5.9 MeV. Accelerator components are being delivered within international semi-industrial partnerships. Currently the RFQ, MYRRHA's first RF structure, is being introduced. It will be followed by the first Medium Energy Beam Transport (MEBT1) and several normal-conducting CH cavities. As the portfolio and number of devices and systems grows there is increased push towards standardization of integration procedures, interfaces to system-wide services, configuration management. Several partners provide components with varying level of vertical integration. The responsibility of the Control System integrator is therefore shifting towards provision of integration guidelines, configuration and deployment of central services and management tools, training to the contributing developers, help with specifications and requirements, quality insurance and acceptance criteria.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML075  
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THPML094 New Methods for Dispersion Measurement and Correction for 12 GeV CEBAF quadrupole, cavity, controls, simulation 4882
 
  • D.L. Turner
    JLab, Newport News, Virginia, USA
  
  Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177.
This paper discusses methods for dispersion measurement and correction for the Continuous Electron Beam Accelerator Facility (CEBAF) for the 12GeV era. New methods will be compared with methods used during the 6GeV era. New software tools which implement the new methods will be discussed, along with a method for automating dispersion measurement and correction. New dispersion measurement and correction methods and tools are being implemented to provide more deterministic results and to reduce machine setup time. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML094  
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THPML133 Design and Optimization of the Electron Gun electron, gun, cathode, simulation 4995
 
  • K. Huang, T.L. He, Z.L. Ren, D.R. Xu, H. Xu
    USTC/NSRL, Hefei, Anhui, People's Republic of China
  • Y. Chen
    Department of Information Engineering , Anhui Economic Management Cadres' Institute, Hefei, Anhui, People's Republic of China
  
  Funding: Work supported by the National Nature Science Foundation of China under Grant Nos.11375176 and 10875118.
Design of an energy-modified electron gun is of significance to do some research on the properties of Diamond-amplified cathode. Based on the design method of the Pierce electron gun, the optimum parameters of the electron gun have been obtained using the Opera-3D program. And the beam waist's position, the beam current, the beam size and the beam emittance related to the electron bean energy was investigated in this paper. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML133  
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