IPAC2015 - List of Keywords (hardware)

Paper	Title	Other Keywords	Page
MOXGB3	LHC Commissioning at Higher Energy	operation, dipole, injection, cryogenics	6
	P. Collier, F. Bordry, J. Wenninger CERN, Geneva, Switzerland
	The LHC has just come to the end of its first Long Shutdown (LS1) and preparations are underway to prepare for Run 2 data taking at 13 TeV centre of mass energy. After briefly recalling the major work undertaken during the 2-year long LS1, details will be given of the cool-down and hardware commissioning phase where each individual superconducting circuit is individually qualified for operation at nominal current. For the main dipole circuits this phase was completed with a quench training campaign in order to operate reliably at the required field. In parallel to the training campaign a rigorous cold checkout has been used to qualify the machine as an ensemble and to establish the conditions necessary for beam operation. The details of this phase will be given together with associated dry runs and beam injection tests. Finally, the latest news will be presented concerning the beam commissioning of the machine in preparation for first physics operation, which will hopefully begin in June.
	Slides MOXGB3 [8.452 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOXGB3
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MOPHA030	Commissioning of the Low-Noise MTCA.4-based Local Oscillator and Clock Generation Module	shielding, monitoring, distributed, controls	847
	U. Mavrič, J. Branlard, M. Hoffmann, F. Ludwig, H. Schlarb DESY, Hamburg, Germany D.R. Makowski, A. Mielczarek, P. Perek TUL-DMCS, Łódź, Poland A. Rohlev Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Funding: Helmholtz Validation Fund Project "MicroTCA.4 for Industry" Within the Helmholtz Validation Fund Project "MicroTCA.4 for Industry", DESY together with collaboration partners from industry and research developed a compact fully MicroTCA chassis-integrated local RF oscillator module. The local oscillator and clock generation module generates a low noise local oscillator out of the global reference that is distributed over the accelerator. The module includes a splitting section which provides 9 local oscillator signals which are distributed over the RF-Backplane to the rear-transition modules. Similarly, the clock signal is also generated out of a single reference input by means of low-noise dividers. The clock is then fan-out to 22 differential lines that are routed over the RF backplane to the rear-transition modules. The functional block is implemented such that it fits in the rear slots 15 and 14 of a standard MTCA.4 crate. In the paper the commissioning results measured on the L3 low-level RF stations of the European XFEL will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPHA030
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MOPHA034	High Voltage RTM Piezo Driver for XFEL Special Diagnostics	laser, diagnostics, operation, high-voltage	860
	K.P. Przygoda, M. Felber, C. Gerth, M. Heuer, E. Janas, U. Mavrič, P. Peier, H. Schlarb, B. Steffen, C. Sydlo DESY, Hamburg, Germany T. Kozak, P. Prędki TUL-DMCS, Łódź, Poland
	High voltage RTM Piezo Driver has been developed to support special diagnostic applications foreseen for XFEL facility. The RTM is capable of driving 4 piezo actuators with voltages up to ±80 V. The solid-state power amplifiers are driven using 18-bit DACs and sampling rates of 1 MSPS. The bandwidth of the driver is remotely tunable using programmable low pass filters. The 4-channel Piezo Driver unit provides the information of piezo output voltage and current. Three independent test setups have been built to test 4-channel Piezo Driver performance. In the paper we are presenting EOD laser lock to 1.3 GHz FLASH master oscillator using bipolar piezo stretcher (fine tuning). The piezo motor based course tuning has been applied for the long term laser stability measurements. The unipolar piezo actuator operation has been demonstrated for the Origami Onefive laser locked to 1.3 GHz LAB MO. The preliminary results of active stabilization of 3 km fiber link laboratory setup are shown.
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MOPTY004	Wakefield Monitor Experiments with X-Band Accelerating Structures	wakefield, linac, pick-up, dipole	947
	R.L. Lillestøl, E. Adli, J. Pfingstner University of Oslo, Oslo, Norway R. Corsini, S. Döbert, W. Farabolini, L. Malina, W. Wuensch CERN, Geneva, Switzerland
	The accelerating structures for CLIC must be aligned with a precision of a few um with respect to the beam trajectory in order to mitigate emittance growth due to transverse wake fields. We report on first results from wake field monitor tests in an X-band structure, with a probe beam at the CLIC Test Facility. The monitors are currently installed in the CLIC Two-Beam Module. In order to fully demonstrate the feasibility of using wakefield monitors for CLIC, the precision of the monitors must be verified using a probe beam while simultaneously filling the structure with high power rf used to drive the accelerating mode. We outline plans to perform such a demonstration in the CLIC Test Facility.
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MOPTY008	Preliminary Hardware Implementation of Compensation Mechanism of Superconducting Cavity Failure in C-ADS Linac	FPGA, linac, cavity, proton	953
	Z. Xue, J.P. Dai IHEP, Beijing, People's Republic of China L. Cheng, Y. Yang SINANO, Suzhou, People's Republic of China
	For the proton linear accelerators used in applications such as ADS, due to the nature of the operation, it is essential to have beam failures at the rate several orders of magnitude lower than usual performance of similar accelerators. In order to achieve this extremely high performance reliability requirement, in addition to hardware improvement, a failure tolerant design is mandatory. A compensation mechanism to cope with hardware failure, mainly RF failures of superconducting cavities, will be in place in order to maintain the high uptime, short recovery time and extremely low frequency of beam loss. The hardware implementation of the mechanism poses high challenges due to the extremely tight timing constraints, high logic complexity, and mostly important, high flexibility and short turnaround time due to varying operation contexts. We will explore the hardware implementation of the scheme using fast electronic devices and Field Programmable Gate Array (FPGA). In order to achieve the goals of short recovery time and flexibility in compensation algorithms, an advanced hardware design methodology including high-level synthesis will be used.
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MOPTY019	Precise Position Measurement by Analyzing the Correlation Between Electrodes of a Single Bpm	simulation, pick-up, synchrotron, impedance	975
	Z.C. Chen SSRF, Shanghai, People's Republic of China L.W. Lai, Y.B. Leng, Y.B. Yan SINAP, Shanghai, People's Republic of China
	Beam position is one of the most important parameters in a particle accelerator. The more accurate and precise the measurement system is, the more features of the beam dynamics could be revealed. A method called model-independent analysis (MIA) takes advantage of multiple beam position monitors (BPM) on the storage ring to obtain the actual beam positions by removing the random noise of each BPM. Inspired by MIA, the original voltage waveforms obtained from the electrodes of a single BPM can also be decomposed to get the beam position information. This article discusses the results of the experiments and the evaluation of the performance of the BPM at the Shanghai Institute of Applied Physics.
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MOPTY022	Bunch by Bunch DBPM Processor Development and Preliminary Experiment in SSRF*	injection, betatron, FPGA, experiment	984
	Y.B. Leng, Z.C. Chen, L.W. Lai, Y.B. Yan, Y. Yang SSRF, Shanghai, People's Republic of China
	Funding: Work supported by Chinese NSFC11375255. Digital BPM processor with turn-by-turn capability has been widely used in synchrotron radiation facilities over the world, which is proved to be very useful and powerful for daily operation and linear optics study but not good enough in the case of individual bunch information required. In order to sufficient individual bunch diagnostics requirements a development plan of the next generation DBPM processor with bunch-by-bunch capability has been initiated in SINAP since 2012. The whole development was divided into three steps: a concept processor based on digital oscilloscope IOC, an algorithm prototype processor based on commercial high speed ADC board, and a custom designed dedicated processor. The progress of this work and several preliminary beam experiments will be discussed in this paper.
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MOPTY050	Design, Development and Implementation of a Highly Dependable Magnet Powering Interlock System for ESS	PLC, power-supply, operation, software	1045
	M. Zaera-Sanz, S.L. Birch, A. Monera Martinez, A. Nordt ESS, Lund, Sweden
	Approximately 350 resistive magnets and 350 power supplies (PS) will be installed in the 600 m long linear accelerator (LINAC) at ESS, transporting the proton beam from the source to the target station. In order to protect this equipment from damage (e.g. due to overheating) and to take the appropriate actions required to minimise recovery time, a dedicated magnet powering interlock system is being designed. The magnet powering interlock system will safely switch off a PS upon the detection of an internal magnet or PS failure and inform the beam interlock system to inhibit further beam operation. The different failure modes and related mitigation techniques of magnets and their PS will be presented. Failures of the magnet cooling system can be detected for example by interlocking the opening of a thermo-switch or a flow-switch. To achieve the required level of dependability, an interlock system based on safety PLC technology, distributed safety PLC software programming tools, PROFINET fieldbus networking, and current loops for hardwired interlock signal exchanges, has been prototyped and will be discussed.
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MOPTY056	Elena Orbit and Schottky Measurement Systems	pick-up, FPGA, antiproton, diagnostics	1061
	L. Søby, M.E. Angoletta, R. Marco-Hernandez, J.C. Molendijk, F. Pedersen, J. Sanchez-Quesada CERN, Geneva, Switzerland M. Bau University of Brescia, Brescia, Italy M. Ferrari, V. Ferrari Università di Brescia, Brescia, Italy
	A new Extra Low ENergy Antiproton ring (ELENA) is under construction at CERN to further decelerate the antiprotons from the existing Antiproton Decelerator (AD) to an energy of just 100 keV. This contribution will describe the beam position system foreseen for ELENA and how it can be adapted for Schottky measurements. The orbit system being developed is based on electrostatic shoebox BPMs fitted with Digital Down Converters (DDC). The main requirement is to measure complete orbits every 20 ms with a resolution of 0.1mm for intensities in the range of 1-3x10⁷ charges. The pick-up signals will, after amplification with a low noise charge amplifier, be down-mixed to baseband for position computation. In order to provide the longitudinal Schottky diagnostics of un-bunched beams, the 20 BPM sum signals will, after time off flight corrections, be added digitally to give an expected S/N increase of 13 dB compared to using a single electrostatic pick-up.
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MOPWI001	First Results From Beam Tests of the CLIC Drive Beam Phase Feedforward Prototype at CTF3	kicker, optics, dipole, operation	1139
	J. Roberts, P. Burrows, G.B. Christian, C. Perry JAI, Oxford, United Kingdom A. Andersson, R. Corsini, P.K. Skowroński CERN, Geneva, Switzerland A. Ghigo, F. Marcellini INFN/LNF, Frascati (Roma), Italy
	Funding: Work supported by the European Commission under the FP7 Research Infrastructures project Eu-CARD, grant agreement no. 227579. In the CLIC two beam acceleration scheme 100 MV/m normal conducting cavities are fed with RF power extracted from a secondary high power but low energy drive beam. To ensure the efficiency and luminosity performance of CLIC the phase synchronisation between the high energy main beam and the drive beam must be maintained to within 0.2 degrees of 12 GHz. To reduce the drive beam phase jitter to this level a low-latency drive beam phase feedforward correction with bandwidth above 17.5 MHz is required. A prototype of this system has been installed at the CLIC test facility CTF3 to prove its feasibility, in particular the challenges of high bandwidth, high power and low latency hardware. The final commissioning and first results from operation of the complete phase feedforward system are presented here.
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MOPWI034	Adaptive Accelerator Tuning	controls, DTL, feedback, simulation	1237
	A. Scheinker LANL, Los Alamos, New Mexico, USA
	We start with an overview of advanced adaptive control schemes in use throughout the accelerator community. We then present a recently developed, novel, model-independent feedback controller, which is robust to measurement noise, and able to tune an arbitrary number of coupled parameters simultaneously based only on a user-defined cost function. We discuss the possibility of combining virtual beam measurements from simulations with actual diagnostic signals from the accelerator into a single cost function, which takes into account both unknown machine variations and estimates of physically inaccessible beam characteristics. We present recent in-hardware experimental results obtained at the Los Alamos Neutron Science Center* and at the Facility for Advanced Accelerator Tests (FACET)**, demonstrating the scheme’s ability to simultaneously tune many parameters and its robustness to noise and system time-variation. A. Scheinker et al., PRSTAB, 16, 102803, 2013. A. Scheinker et al., NIMA, 756, pp. 30-38, 2014. * A. Scheinker and S. Gessner, Conference on Decision and Control, 2014.
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MOPWI036	Investigation of Continuous Scan Methods for Rapid Data Acquisition	detector, data-acquisition, software, experiment	1243
	C.L. Li East China University of Science and Technology, Shanghai, People's Republic of China A.M. Kiss SLAC, Menlo Park, California, USA W.J. Zhang University of Saskatchewan, Saskatoon, Canada
	It is common practice to perform spatially resolved X ray data acquisition by automatically moving components to discrete locations and then measuring beam intensity with the system at rest. While effective, scanning in this manner can be time consuming, with motors needing to accelerate, move and decelerate at each location before recording data. Information between data points may be missed unless fine grid scans are performed, which accounts for a further increase of scan time. Recent advances in commercial hardware and software enables a continuous scan capability for a wide range of applications, which saves the start and end of step motors. To compare scanning performance, both step and continuous scan modes were examined using the SPEC command language with both commercial and in-house hardware. The advantages and limitations of each are discussed.
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MOPWI044	Beamline Insertions Manager at Jefferson Lab	software, EPICS, controls, operation	1253
	M.C. Johnson JLab, Newport News, Virginia, USA
	Funding: This manuscript has been authored by Jefferson Science Associates, LLC under Contract No. DE-AC05-06OR23177 with the U.S. Department of Energy. The beam viewer system at Jefferson Lab provides operators and beam physicists with qualitative and quantitative information on the transverse electron beam properties. There are over 140 beam viewers installed on the 12 GeV CEBAF accelerator. This paper describes an upgrade consisting of replacing the EPICS based system tasked with managing all viewers with a mixed system utilizing EPICS and high level software. Most devices, particularly the beam viewers, cannot be safely inserted into the beam line during high-current beam operations. Software is partly responsible for protecting the machine from untimely insertions. The multiplicity of beam-blocking and beam-vulnerable devices motivate us to try a data-driven approach. The beamline insertions application components are centrally managed and configured through an object-oriented software framework created for this purpose. A rules-based engine tracks the configuration and status of every device, along with the beam status of the machine segment containing the device. The application uses this information to decide on which device actions are allowed at any given time.
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MOPWI045	The CEBAF Element Database and Related Operational Software	database, controls, software, cavity	1256
	T. L. Larrieu, M.E. Joyce, M. Keesee, C.J. Slominski, R.J. Slominski, D.L. Turner JLab, Newport News, Virginia, USA
	Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. The newly commissioned 12 GeV CEBAF accelerator relies on a flexible, scalable and comprehensive database to define the accelerator. This database delivers the configuration for CEBAF operational tools, including hardware checkout, the downloadable optics model, control screens, and much more. The presentation will describe the flexible design of the CEBAF Element Database (CED), its features and assorted use case examples.
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MOPWI047	Architectural Improvements and New Processing Tools for the Open XAL Online Model	cavity, simulation, software, coupling	1262
	C.K. Allen, T.A. Pelaia II ORNL, Oak Ridge, Tennessee, USA J.M. Freed University of South Carolina, Columbia, USA
	Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725. The Open XAL online model is the component of Open XAL* providing accelerator modeling dynamic synchronization to live hardware. Several significant architectural enhancements and feature additions have been made concerning the handling and processing of simulation data. The major structural change is the creation of a single class Trajectory<> that manages all simulation data. Another significant design change was the development of standard tools for processing simulation results. One may obtain machine parameters such as fixed orbit, phase advance, dispersion, etc., or beam-based calculations such as RMS size and centroid location simply by passing simulation results, i.e. a Trajectory<> object, to these computation tools. Finally, the ability to fully create composite modeling elements was implemented in the online model. Specifically, accelerator hardware can be modeled as a collection of constituent modeling elements. This sub-structure capability is extremely useful for modeling RF cavities consisting of coupled RF gaps coupled and drift spaces. We present an overview of the new architecture and how it is used when building applications. * http://xaldev.sourceforge.net/
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TUPJE053	Hardware Improvements and Beam Commissioning of the Booster Ring in Taiwan Photon Source	booster, synchrotron, linac, injection	1741
	H.-J. Tsai, C.-T. Chen, J.Y. Chen, M.-S. Chiu, P.C. Chiu, P.J. Chou, K.T. Hsu, K.H. Hu, C.-C. Kuo, Y.-C. Liu, G.-H. Luo, F.H. Tseng NSRRC, Hsinchu, Taiwan
	Taiwan Photon Source (TPS), a low emittance 3-GeV third-generation synchrotron light source, began its hardware integration testing, safety checkout and beam commissioning on August 12, 2014 [1]. The booster ring and the storage ring share the same tunnel in a concentric fashion; the booster ring has circumference 496.8 m, the largest among light source facilities in operation. A combined-function FODO lattice is adopted for the booster ring with natural emittance 10 nm-rad. After hardware improvements were completed, the commissioning of the beam in the booster ring began on December 12 and attained the 3-GeV design energy on December 16.
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TUPHA007	NSLS II Booster Extended Integration Test	booster, operation, controls, diagnostics	1977
	G.M. Wang, B. Bacha, A. Blednykh, E.B. Blum, W.X. Cheng, J. Choi, L.R. Dalesio, M.A. Davidsaver, J.H. De Long, R.P. Fliller, G. Ganetis, W. Guo, K. Ha, Y. Hu, W. Louie, T.V. Shaftan, G. Shen, O. Singh, Y. Tian, F.J. Willeke, L. Yang, X. Yang BNL, Upton, Long Island, New York, USA P.B. Cheblakov, A.A. Derbenev, A.I. Erokhin, S.E. Karnaev, S.V. Sinyatkin BINP SB RAS, Novosibirsk, Russia V.V. Smaluk DLS, Oxfordshire, United Kingdom
	The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven National Laboratory. While the installation activities in the booster-synchrotron are nearly completed and waiting for the authorization to start the booster commissioning, the injector and accelerator physics group have engaged into the Integrated Testing phase. We did the booster commissioning with simulated beam signals, called extended integrated testing (EIT) to prepare for the booster ring commissioning. It is to make sure the device function along with utilities, timing system and control system, to calibrate diagnostics system, debug High Level Applications, test and optimize all the operation screens to reduce the potential problems during booster commissioning with beam.
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TUPTY023	Lessons Learned From the First Long Shutdown of the Lhc and Its Injector Chain	operation, radiation, superconducting-magnet, collider	2050
	K. Foraz, M.B.M. Barberan Marin, M. Bernardini, J. Coupard, N. Gilbert, D. Hay, S. Mataguez, D.J. Mcfarlane, E. Vergara Fernandez CERN, Geneva, Switzerland
	The First Long Shutdown (LS1) of the LHC and its Injector chain, which started in February 2013, was completed by the first quarter 2015. A huge number of activities have been performed; this paper reviews the process of the coordination of LS1 from the preparatory phase to the testing phase. The preparatory phase is a very important process: an accurate view of what is to be done, and what can be done is essential. But reality is always different, the differences between what was planned and what was done will be described. The paper will recall the coordination, reporting and decisional processes, highlighting points of success and points to be improved in terms of general coordination, in-situ coordination, safety coordination, logistics and resource management.
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TUPTY037	HLLHCV1.1 Optics Version for the HL-LHC Upgrade	optics, cavity, luminosity, quadrupole	2090
	R. De Maria, S.D. Fartoukh, M. Fitterer CERN, Geneva, Switzerland
	Funding: The HiLumi LHC Design Study is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404. The optics and layout of the HL-LHC are evolving as the new hardware is being studied and integrated, any additional requirements from the experiments detailed, and other constraints of different nature clarified. Here we present the changes of version 1.1 of the optics and layout with respect to the previous version 1.0, which include the current hardware choices and an outlook on the main resulting optics limitations and the possible future evolutions of the layout.
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TUPWI015	Experience on Serial Production of the Quadrupole Movers with Submicrometric Repeatability for the European XFEL*	controls, quadrupole, dumping, operation	2271
	J. Munilla, J. Calero, L. García-Tabarés, A. Guirao, J.L. Gutiérrez, T. Martínez, E. Molina Marinas, F. Toral, C. Vázquez CIEMAT, Madrid, Spain J.A. Gorrotxategi, M. Tarragual ZEHATZ, Mendaro, Spain B. Junkera, A. Urzainki DMP, Mendaro, Spain C. Martins, E. Ramiro, F. Ramiro RAMEM, Madrid, Spain
	Funding: This work is partially supported by the Spanish Ministry of Science and Innovation under SEI Resolution on 17-September-2009 and Project ref. AIC10-A-000524 CIEMAT is in charge of the design and manufacturing of the quadrupole movers with submicrometric repeatability for the XFEL. EU intersections. Prototyping of these precision devices was successful but manufacturing them in a serial production scheme (101 units) implies some changes at design, fabrication procedures and quality controls. This paper will present some of the main problems and solutions adopted to transform a prototype made at a research facility into a serial production at a conventional industrial company. Also, it describes the inspection and tests, the quality controls and reporting procedures. All the devices have been validated and recepted. This paper describes the adopted procedure and the performance of the serial units.
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WEPMA002	The Beam Chopper Power Converter for MedAustron: Safety by Design and Development	kicker, controls, synchrotron, software	2741
	T. Stadlbauer, R. Filippini, X. German, F. Osmić, P. Urschütz EBG MedAustron, Wr. Neustadt, Austria M.J. Barnes, T. Kramer CERN, Geneva, Switzerland M. Beerwald, D. Dirksen Poynting GmbH, Dortmund, Germany
	MedAustron is the Austrian centre for hadron therapy and non-clinical research. The beam chopper system is an essential component for patient safety in specific hazardous situations as well as for beam delivery from the synchrotron to the irradiation rooms. This paper presents the results from the development phase and the commissioning of the MedAustron beam chopper system. Details will be given on the design, the risk management, the test and the verification of the chopper power converter (PKC).
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WEPMN061	ESS PLC Controls Strategy	PLC, timing, controls, vacuum	3066
	D.P. Piso, P. Arnold, S.L. Birch, T. Gahl, T. Korhonen, A. Nordt, J.G. Weisend ESS, Lund, Sweden
	The European Spallation Source ESS AB is an accelerator-driven neutron spallation source. The Integrated Controls System (ICS) division is responsible for providing controls and monitoring for all parts of the machine (accelerator, target, neutron scattering systems and conventional facilities). Also, Accelerator Division, Target Division and other parts of the organisation will be deploying PLC Automation Systems. A large number of applications have been identified across all the facility where PLCs will be used: cryogenics, vacuum, water-cooling, fluid systems, power systems, and safety \& protection systems. This work describes the different activities put in place and proposes the strategy followed at ESS regarding PLC technologies. This strategy consists not only of the standardisation of a PLC vendor but also testing activities, generation of documentation and standardization of other aspects (for instance, regarding installation). The documentation about PLC controls integration and standardisation and the approach to insert PLCs in the different controls workflows are described. Finally, the results of different tests (PLC timing correlation) are shown.
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WEPMN071	Enhanced Diagnostic Systems for the Supervision of the Superconducting Circuits of the LHC	operation, diagnostics, dipole, controls	3090
	R. Denz, Z. Charifoulline, K. Dahlerup-Petersen, A.P. Siemko, J. Steckert CERN, Geneva, Switzerland
	Being an integral part of the protection system for the superconducting circuits of the LHC, the data acquisition systems used for the circuit supervision underwent a substantial upgrade during the first long shutdown of the LHC. The sampling rates and resolution of most of the acquired signals increased significantly. Newly added measurements channels like for the supervision of the quench heater circuits of the LHC main dipoles allow identifying specific fault states. All LHC main circuits are meanwhile equipped with earth voltage feelers allowing monitoring the electrical insulation strength, especially during the fast discharges. The protection system for the bus-bar splices is now capable to operate in different modes. By this measure, it is possible fulfilling the requirements for different specific tests like the warm bus-bar measurements and current stabilizer continuity measurements (CSCM) without field interventions.
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WEPTY084	Cooling Systems for the New 201.25 MHz Final Power Amplifiers at Los Alamos Neutron Science Center (LANSCE)	DTL, neutron, cavity, controls	3479
	W.C. Barkley, C.E. Buechler, J.T.M. Lyles, A.C. Naranjo LANL, Los Alamos, New Mexico, USA D. Baca, R.E. Bratton Compa Industries, Inc., Los Alamos, New Mexico, USA
	Funding: Los Alamos National Laboratory, an affirmative action/equal opportunity employer, is operated by the University of California for the U.S. Department of Energy under contract W-7405-ENG-36. Two new 201.25 MHz RF Final Power Amplifiers (FPAs) have been designed, fabricated, assembled, installed and successfully tested at the Los Alamos Neutron Science Center (LANSCE), in Module 2 of the Drift Tube Linac. These production units were fabricated at Continental Electronics Corporation. In this paper, we summarize the FPAs air and water cooling requirements and cooling systems.
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WEPWI029	Cavity Design, Fabrication and Test Performance of 750 MHz, 4-Rod Separators for CEBAF 4-Hall Beam Delivery System	cavity, simulation, coupling, target	3548
	H. Wang, G. Cheng, L. Turlington, M.J. Wissmann JLab, Newport News, Virginia, USA
	Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. A short version of the original CEBAF normal conducting 4-rod separator cavity has been developed into a 750MHz one * since the concept of simultaneous 4-hall operation for CEBAF is introduced *. This work has been advanced further based on the EM design optimization, bench measurement and by conducting RF-thermal coupled simulation using CST and ANSYS to confirm the cavity tuning and thermal performance. The cavity fabrication used matured technology like copper plating and machining. The cavity flanges, couplers, tuners and cooling channels adopted consistent/compatible hardware with the existing 500MHz cavities. The electromagnetic and thermal design simulations have greatly reduced the prototyping and bench tuning time of the first prototype. Four production cavities have reached a typical 1.94MV kick voltage or 3.0kW wall loss on each cavity after a minor multipactoring or no processing, 7.5% overhead power than the design specification. R. Kazimi et al., IPAC2013, Shanghai, China, pp 2896-2898. ** R. Kazimi, IPAC2013, Shanghai, China, pp 3502-3504.
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THPF090	Status and Plans for the Upgrade of the CERN PS Booster	injection, proton, booster, cavity	3905
	K. Hanke, D. Aguglia, M.E. Angoletta, W. Bartmann, C. Bedel, E. Benedetto, S. Bertolasi, C. Bertone, J. Betz, T.W. Birtwistle, A. Blas, J. Borburgh, C. Bracco, A.C. Butterworth, E. Carlier, S. Chemli, P. Dahlen, A. Dallocchio, G.P. Di Giovanni, T. Dobers, A. Findlay, R. Froeschl, A. Funken, S. Gabourin, J.L. Grenard, D. Grenier, J. Hansen, D. Hay, J.-M. Lacroix, P. Le Roux, L.A. Lopez Hernandez, C. Martin, A. Masi, B. Mikulec, Y. Muttoni, A. Newborough, D. Nisbet, M.R. Obrecht, M.M. Paoluzzi, S. Pittet, B. Puccio, J. Tan, J. Vollaire, W.J.M. Weterings CERN, Geneva, Switzerland
	CERN’s Proton Synchrotron Booster (PSB) is undergoing a major upgrade program in the frame of the LHC Injectors Upgrade (LIU) project. During the first long LHC shutdown (LS1) some parts of the upgrade have already been implemented, and the machine has been successfully re-commissioned. More work is planned for the upcoming end-of-year technical stops, notably in 2016/17, while most of the upgrade is planned to take place during the second long LHC shutdown (LS2). We report on the upgrade items already completed and commissioned, the first Run 2 beam performance and give a status of the ongoing design and integration work.
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FRYGB1	High Power Proton Beam Facilities: Operational Experience, Challenges, and the Future	target, proton, rfq, operation	4102
	S.M. Cousineau ORNL, Oak Ridge, Tennessee, USA
	High power proton accelerators are increasingly popular as drivers for secondary beams with a large variety of applications, such as neutron sources for materials science and neutrino factories for high energy physics. In the last few decades, average beam powers have increased substantially, giving rise to an array of challenges centered on providing high beam power and availability while maintaining low activation levels. This talk summarizes the current status of high power proton accelerators. It discusses recent operational experiences and lessons learned, and identifies the primary hardware and beam dynamics limitations. A brief review of planned next generation facilities and driving technologies is also presented.
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Paper

Title

Other Keywords

Page

MOXGB3

LHC Commissioning at Higher Energy

operation, dipole, injection, cryogenics

6

P. Collier, F. Bordry, J. Wenninger
CERN, Geneva, Switzerland

The LHC has just come to the end of its first Long Shutdown (LS1) and preparations are underway to prepare for Run 2 data taking at 13 TeV centre of mass energy. After briefly recalling the major work undertaken during the 2-year long LS1, details will be given of the cool-down and hardware commissioning phase where each individual superconducting circuit is individually qualified for operation at nominal current. For the main dipole circuits this phase was completed with a quench training campaign in order to operate reliably at the required field. In parallel to the training campaign a rigorous cold checkout has been used to qualify the machine as an ensemble and to establish the conditions necessary for beam operation. The details of this phase will be given together with associated dry runs and beam injection tests. Finally, the latest news will be presented concerning the beam commissioning of the machine in preparation for first physics operation, which will hopefully begin in June.

Slides MOXGB3 [8.452 MB]

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MOPHA030

Commissioning of the Low-Noise MTCA.4-based Local Oscillator and Clock Generation Module

shielding, monitoring, distributed, controls

847

U. Mavrič, J. Branlard, M. Hoffmann, F. Ludwig, H. Schlarb
DESY, Hamburg, Germany
D.R. Makowski, A. Mielczarek, P. Perek
TUL-DMCS, Łódź, Poland
A. Rohlev
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Funding: Helmholtz Validation Fund Project "MicroTCA.4 for Industry"
Within the Helmholtz Validation Fund Project "MicroTCA.4 for Industry", DESY together with collaboration partners from industry and research developed a compact fully MicroTCA chassis-integrated local RF oscillator module. The local oscillator and clock generation module generates a low noise local oscillator out of the global reference that is distributed over the accelerator. The module includes a splitting section which provides 9 local oscillator signals which are distributed over the RF-Backplane to the rear-transition modules. Similarly, the clock signal is also generated out of a single reference input by means of low-noise dividers. The clock is then fan-out to 22 differential lines that are routed over the RF backplane to the rear-transition modules. The functional block is implemented such that it fits in the rear slots 15 and 14 of a standard MTCA.4 crate. In the paper the commissioning results measured on the L3 low-level RF stations of the European XFEL will be presented.

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MOPHA034

High Voltage RTM Piezo Driver for XFEL Special Diagnostics

laser, diagnostics, operation, high-voltage

860

K.P. Przygoda, M. Felber, C. Gerth, M. Heuer, E. Janas, U. Mavrič, P. Peier, H. Schlarb, B. Steffen, C. Sydlo
DESY, Hamburg, Germany
T. Kozak, P. Prędki
TUL-DMCS, Łódź, Poland

High voltage RTM Piezo Driver has been developed to support special diagnostic applications foreseen for XFEL facility. The RTM is capable of driving 4 piezo actuators with voltages up to ±80 V. The solid-state power amplifiers are driven using 18-bit DACs and sampling rates of 1 MSPS. The bandwidth of the driver is remotely tunable using programmable low pass filters. The 4-channel Piezo Driver unit provides the information of piezo output voltage and current. Three independent test setups have been built to test 4-channel Piezo Driver performance. In the paper we are presenting EOD laser lock to 1.3 GHz FLASH master oscillator using bipolar piezo stretcher (fine tuning). The piezo motor based course tuning has been applied for the long term laser stability measurements. The unipolar piezo actuator operation has been demonstrated for the Origami Onefive laser locked to 1.3 GHz LAB MO. The preliminary results of active stabilization of 3 km fiber link laboratory setup are shown.

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MOPTY004

Wakefield Monitor Experiments with X-Band Accelerating Structures

wakefield, linac, pick-up, dipole

947

R.L. Lillestøl, E. Adli, J. Pfingstner
University of Oslo, Oslo, Norway
R. Corsini, S. Döbert, W. Farabolini, L. Malina, W. Wuensch
CERN, Geneva, Switzerland

The accelerating structures for CLIC must be aligned with a precision of a few um with respect to the beam trajectory in order to mitigate emittance growth due to transverse wake fields. We report on first results from wake field monitor tests in an X-band structure, with a probe beam at the CLIC Test Facility. The monitors are currently installed in the CLIC Two-Beam Module. In order to fully demonstrate the feasibility of using wakefield monitors for CLIC, the precision of the monitors must be verified using a probe beam while simultaneously filling the structure with high power rf used to drive the accelerating mode. We outline plans to perform such a demonstration in the CLIC Test Facility.

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MOPTY008

Preliminary Hardware Implementation of Compensation Mechanism of Superconducting Cavity Failure in C-ADS Linac

FPGA, linac, cavity, proton

953

Z. Xue, J.P. Dai
IHEP, Beijing, People's Republic of China
L. Cheng, Y. Yang
SINANO, Suzhou, People's Republic of China

For the proton linear accelerators used in applications such as ADS, due to the nature of the operation, it is essential to have beam failures at the rate several orders of magnitude lower than usual performance of similar accelerators. In order to achieve this extremely high performance reliability requirement, in addition to hardware improvement, a failure tolerant design is mandatory. A compensation mechanism to cope with hardware failure, mainly RF failures of superconducting cavities, will be in place in order to maintain the high uptime, short recovery time and extremely low frequency of beam loss. The hardware implementation of the mechanism poses high challenges due to the extremely tight timing constraints, high logic complexity, and mostly important, high flexibility and short turnaround time due to varying operation contexts. We will explore the hardware implementation of the scheme using fast electronic devices and Field Programmable Gate Array (FPGA). In order to achieve the goals of short recovery time and flexibility in compensation algorithms, an advanced hardware design methodology including high-level synthesis will be used.

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MOPTY019

Precise Position Measurement by Analyzing the Correlation Between Electrodes of a Single Bpm

simulation, pick-up, synchrotron, impedance

975

Z.C. Chen
SSRF, Shanghai, People's Republic of China
L.W. Lai, Y.B. Leng, Y.B. Yan
SINAP, Shanghai, People's Republic of China

Beam position is one of the most important parameters in a particle accelerator. The more accurate and precise the measurement system is, the more features of the beam dynamics could be revealed. A method called model-independent analysis (MIA) takes advantage of multiple beam position monitors (BPM) on the storage ring to obtain the actual beam positions by removing the random noise of each BPM. Inspired by MIA, the original voltage waveforms obtained from the electrodes of a single BPM can also be decomposed to get the beam position information. This article discusses the results of the experiments and the evaluation of the performance of the BPM at the Shanghai Institute of Applied Physics.

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MOPTY022

Bunch by Bunch DBPM Processor Development and Preliminary Experiment in SSRF*

injection, betatron, FPGA, experiment

984

Y.B. Leng, Z.C. Chen, L.W. Lai, Y.B. Yan, Y. Yang
SSRF, Shanghai, People's Republic of China

Funding: Work supported by Chinese NSFC11375255.
Digital BPM processor with turn-by-turn capability has been widely used in synchrotron radiation facilities over the world, which is proved to be very useful and powerful for daily operation and linear optics study but not good enough in the case of individual bunch information required. In order to sufficient individual bunch diagnostics requirements a development plan of the next generation DBPM processor with bunch-by-bunch capability has been initiated in SINAP since 2012. The whole development was divided into three steps: a concept processor based on digital oscilloscope IOC, an algorithm prototype processor based on commercial high speed ADC board, and a custom designed dedicated processor. The progress of this work and several preliminary beam experiments will be discussed in this paper.

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MOPTY050

Design, Development and Implementation of a Highly Dependable Magnet Powering Interlock System for ESS

PLC, power-supply, operation, software

1045

M. Zaera-Sanz, S.L. Birch, A. Monera Martinez, A. Nordt
ESS, Lund, Sweden

Approximately 350 resistive magnets and 350 power supplies (PS) will be installed in the 600 m long linear accelerator (LINAC) at ESS, transporting the proton beam from the source to the target station. In order to protect this equipment from damage (e.g. due to overheating) and to take the appropriate actions required to minimise recovery time, a dedicated magnet powering interlock system is being designed. The magnet powering interlock system will safely switch off a PS upon the detection of an internal magnet or PS failure and inform the beam interlock system to inhibit further beam operation. The different failure modes and related mitigation techniques of magnets and their PS will be presented. Failures of the magnet cooling system can be detected for example by interlocking the opening of a thermo-switch or a flow-switch. To achieve the required level of dependability, an interlock system based on safety PLC technology, distributed safety PLC software programming tools, PROFINET fieldbus networking, and current loops for hardwired interlock signal exchanges, has been prototyped and will be discussed.

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MOPTY056

Elena Orbit and Schottky Measurement Systems

pick-up, FPGA, antiproton, diagnostics

1061

L. Søby, M.E. Angoletta, R. Marco-Hernandez, J.C. Molendijk, F. Pedersen, J. Sanchez-Quesada
CERN, Geneva, Switzerland
M. Bau
University of Brescia, Brescia, Italy
M. Ferrari, V. Ferrari
Università di Brescia, Brescia, Italy

A new Extra Low ENergy Antiproton ring (ELENA) is under construction at CERN to further decelerate the antiprotons from the existing Antiproton Decelerator (AD) to an energy of just 100 keV. This contribution will describe the beam position system foreseen for ELENA and how it can be adapted for Schottky measurements. The orbit system being developed is based on electrostatic shoebox BPMs fitted with Digital Down Converters (DDC). The main requirement is to measure complete orbits every 20 ms with a resolution of 0.1mm for intensities in the range of 1-3x10⁷ charges. The pick-up signals will, after amplification with a low noise charge amplifier, be down-mixed to baseband for position computation. In order to provide the longitudinal Schottky diagnostics of un-bunched beams, the 20 BPM sum signals will, after time off flight corrections, be added digitally to give an expected S/N increase of 13 dB compared to using a single electrostatic pick-up.

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MOPWI001

First Results From Beam Tests of the CLIC Drive Beam Phase Feedforward Prototype at CTF3

kicker, optics, dipole, operation

1139

J. Roberts, P. Burrows, G.B. Christian, C. Perry
JAI, Oxford, United Kingdom
A. Andersson, R. Corsini, P.K. Skowroński
CERN, Geneva, Switzerland
A. Ghigo, F. Marcellini
INFN/LNF, Frascati (Roma), Italy

Funding: Work supported by the European Commission under the FP7 Research Infrastructures project Eu-CARD, grant agreement no. 227579.
In the CLIC two beam acceleration scheme 100 MV/m normal conducting cavities are fed with RF power extracted from a secondary high power but low energy drive beam. To ensure the efficiency and luminosity performance of CLIC the phase synchronisation between the high energy main beam and the drive beam must be maintained to within 0.2 degrees of 12 GHz. To reduce the drive beam phase jitter to this level a low-latency drive beam phase feedforward correction with bandwidth above 17.5 MHz is required. A prototype of this system has been installed at the CLIC test facility CTF3 to prove its feasibility, in particular the challenges of high bandwidth, high power and low latency hardware. The final commissioning and first results from operation of the complete phase feedforward system are presented here.

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MOPWI034

Adaptive Accelerator Tuning

controls, DTL, feedback, simulation

1237

A. Scheinker
LANL, Los Alamos, New Mexico, USA

We start with an overview of advanced adaptive control schemes in use throughout the accelerator community. We then present a recently developed, novel, model-independent feedback controller*, which is robust to measurement noise, and able to tune an arbitrary number of coupled parameters simultaneously based only on a user-defined cost function. We discuss the possibility of combining virtual beam measurements from simulations with actual diagnostic signals from the accelerator into a single cost function, which takes into account both unknown machine variations and estimates of physically inaccessible beam characteristics. We present recent in-hardware experimental results obtained at the Los Alamos Neutron Science Center** and at the Facility for Advanced Accelerator Tests (FACET)***, demonstrating the scheme’s ability to simultaneously tune many parameters and its robustness to noise and system time-variation.
* A. Scheinker et al., PRSTAB, 16, 102803, 2013.
** A. Scheinker et al., NIMA, 756, pp. 30-38, 2014.
*** A. Scheinker and S. Gessner, Conference on Decision and Control, 2014.

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MOPWI036

Investigation of Continuous Scan Methods for Rapid Data Acquisition

detector, data-acquisition, software, experiment

1243

C.L. Li
East China University of Science and Technology, Shanghai, People's Republic of China
A.M. Kiss
SLAC, Menlo Park, California, USA
W.J. Zhang
University of Saskatchewan, Saskatoon, Canada

It is common practice to perform spatially resolved X ray data acquisition by automatically moving components to discrete locations and then measuring beam intensity with the system at rest. While effective, scanning in this manner can be time consuming, with motors needing to accelerate, move and decelerate at each location before recording data. Information between data points may be missed unless fine grid scans are performed, which accounts for a further increase of scan time. Recent advances in commercial hardware and software enables a continuous scan capability for a wide range of applications, which saves the start and end of step motors. To compare scanning performance, both step and continuous scan modes were examined using the SPEC command language with both commercial and in-house hardware. The advantages and limitations of each are discussed.

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MOPWI044

Beamline Insertions Manager at Jefferson Lab

software, EPICS, controls, operation

1253

M.C. Johnson
JLab, Newport News, Virginia, USA

Funding: This manuscript has been authored by Jefferson Science Associates, LLC under Contract No. DE-AC05-06OR23177 with the U.S. Department of Energy.
The beam viewer system at Jefferson Lab provides operators and beam physicists with qualitative and quantitative information on the transverse electron beam properties. There are over 140 beam viewers installed on the 12 GeV CEBAF accelerator. This paper describes an upgrade consisting of replacing the EPICS based system tasked with managing all viewers with a mixed system utilizing EPICS and high level software. Most devices, particularly the beam viewers, cannot be safely inserted into the beam line during high-current beam operations. Software is partly responsible for protecting the machine from untimely insertions. The multiplicity of beam-blocking and beam-vulnerable devices motivate us to try a data-driven approach. The beamline insertions application components are centrally managed and configured through an object-oriented software framework created for this purpose. A rules-based engine tracks the configuration and status of every device, along with the beam status of the machine segment containing the device. The application uses this information to decide on which device actions are allowed at any given time.

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MOPWI045

The CEBAF Element Database and Related Operational Software

database, controls, software, cavity

1256

T. L. Larrieu, M.E. Joyce, M. Keesee, C.J. Slominski, R.J. Slominski, D.L. Turner
JLab, Newport News, Virginia, USA

Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
The newly commissioned 12 GeV CEBAF accelerator relies on a flexible, scalable and comprehensive database to define the accelerator. This database delivers the configuration for CEBAF operational tools, including hardware checkout, the downloadable optics model, control screens, and much more. The presentation will describe the flexible design of the CEBAF Element Database (CED), its features and assorted use case examples.

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MOPWI047

Architectural Improvements and New Processing Tools for the Open XAL Online Model

cavity, simulation, software, coupling

1262

C.K. Allen, T.A. Pelaia II
ORNL, Oak Ridge, Tennessee, USA
J.M. Freed
University of South Carolina, Columbia, USA

Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725.
The Open XAL online model is the component of Open XAL* providing accelerator modeling dynamic synchronization to live hardware. Several significant architectural enhancements and feature additions have been made concerning the handling and processing of simulation data. The major structural change is the creation of a single class Trajectory<> that manages all simulation data. Another significant design change was the development of standard tools for processing simulation results. One may obtain machine parameters such as fixed orbit, phase advance, dispersion, etc., or beam-based calculations such as RMS size and centroid location simply by passing simulation results, i.e. a Trajectory<> object, to these computation tools. Finally, the ability to fully create composite modeling elements was implemented in the online model. Specifically, accelerator hardware can be modeled as a collection of constituent modeling elements. This sub-structure capability is extremely useful for modeling RF cavities consisting of coupled RF gaps coupled and drift spaces. We present an overview of the new architecture and how it is used when building applications.
* http://xaldev.sourceforge.net/

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TUPJE053

Hardware Improvements and Beam Commissioning of the Booster Ring in Taiwan Photon Source

booster, synchrotron, linac, injection

1741

H.-J. Tsai, C.-T. Chen, J.Y. Chen, M.-S. Chiu, P.C. Chiu, P.J. Chou, K.T. Hsu, K.H. Hu, C.-C. Kuo, Y.-C. Liu, G.-H. Luo, F.H. Tseng
NSRRC, Hsinchu, Taiwan

Taiwan Photon Source (TPS), a low emittance 3-GeV third-generation synchrotron light source, began its hardware integration testing, safety checkout and beam commissioning on August 12, 2014 [1]. The booster ring and the storage ring share the same tunnel in a concentric fashion; the booster ring has circumference 496.8 m, the largest among light source facilities in operation. A combined-function FODO lattice is adopted for the booster ring with natural emittance 10 nm-rad. After hardware improvements were completed, the commissioning of the beam in the booster ring began on December 12 and attained the 3-GeV design energy on December 16.

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TUPHA007

NSLS II Booster Extended Integration Test

booster, operation, controls, diagnostics

1977

G.M. Wang, B. Bacha, A. Blednykh, E.B. Blum, W.X. Cheng, J. Choi, L.R. Dalesio, M.A. Davidsaver, J.H. De Long, R.P. Fliller, G. Ganetis, W. Guo, K. Ha, Y. Hu, W. Louie, T.V. Shaftan, G. Shen, O. Singh, Y. Tian, F.J. Willeke, L. Yang, X. Yang
BNL, Upton, Long Island, New York, USA
P.B. Cheblakov, A.A. Derbenev, A.I. Erokhin, S.E. Karnaev, S.V. Sinyatkin
BINP SB RAS, Novosibirsk, Russia
V.V. Smaluk
DLS, Oxfordshire, United Kingdom

The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven National Laboratory. While the installation activities in the booster-synchrotron are nearly completed and waiting for the authorization to start the booster commissioning, the injector and accelerator physics group have engaged into the Integrated Testing phase. We did the booster commissioning with simulated beam signals, called extended integrated testing (EIT) to prepare for the booster ring commissioning. It is to make sure the device function along with utilities, timing system and control system, to calibrate diagnostics system, debug High Level Applications, test and optimize all the operation screens to reduce the potential problems during booster commissioning with beam.

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TUPTY023

Lessons Learned From the First Long Shutdown of the Lhc and Its Injector Chain

operation, radiation, superconducting-magnet, collider

2050

K. Foraz, M.B.M. Barberan Marin, M. Bernardini, J. Coupard, N. Gilbert, D. Hay, S. Mataguez, D.J. Mcfarlane, E. Vergara Fernandez
CERN, Geneva, Switzerland

The First Long Shutdown (LS1) of the LHC and its Injector chain, which started in February 2013, was completed by the first quarter 2015. A huge number of activities have been performed; this paper reviews the process of the coordination of LS1 from the preparatory phase to the testing phase. The preparatory phase is a very important process: an accurate view of what is to be done, and what can be done is essential. But reality is always different, the differences between what was planned and what was done will be described. The paper will recall the coordination, reporting and decisional processes, highlighting points of success and points to be improved in terms of general coordination, in-situ coordination, safety coordination, logistics and resource management.

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TUPTY037

HLLHCV1.1 Optics Version for the HL-LHC Upgrade

optics, cavity, luminosity, quadrupole

2090

R. De Maria, S.D. Fartoukh, M. Fitterer
CERN, Geneva, Switzerland

Funding: The HiLumi LHC Design Study is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404.
The optics and layout of the HL-LHC are evolving as the new hardware is being studied and integrated, any additional requirements from the experiments detailed, and other constraints of different nature clarified. Here we present the changes of version 1.1 of the optics and layout with respect to the previous version 1.0, which include the current hardware choices and an outlook on the main resulting optics limitations and the possible future evolutions of the layout.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPTY037

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TUPWI015

Experience on Serial Production of the Quadrupole Movers with Submicrometric Repeatability for the European XFEL*

controls, quadrupole, dumping, operation

2271

J. Munilla, J. Calero, L. García-Tabarés, A. Guirao, J.L. Gutiérrez, T. Martínez, E. Molina Marinas, F. Toral, C. Vázquez
CIEMAT, Madrid, Spain
J.A. Gorrotxategi, M. Tarragual
ZEHATZ, Mendaro, Spain
B. Junkera, A. Urzainki
DMP, Mendaro, Spain
C. Martins, E. Ramiro, F. Ramiro
RAMEM, Madrid, Spain

Funding: This work is partially supported by the Spanish Ministry of Science and Innovation under SEI Resolution on 17-September-2009 and Project ref. AIC10-A-000524
CIEMAT is in charge of the design and manufacturing of the quadrupole movers with submicrometric repeatability for the XFEL. EU intersections. Prototyping of these precision devices was successful but manufacturing them in a serial production scheme (101 units) implies some changes at design, fabrication procedures and quality controls. This paper will present some of the main problems and solutions adopted to transform a prototype made at a research facility into a serial production at a conventional industrial company. Also, it describes the inspection and tests, the quality controls and reporting procedures. All the devices have been validated and recepted. This paper describes the adopted procedure and the performance of the serial units.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPWI015

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WEPMA002

The Beam Chopper Power Converter for MedAustron: Safety by Design and Development

kicker, controls, synchrotron, software

2741

T. Stadlbauer, R. Filippini, X. German, F. Osmić, P. Urschütz
EBG MedAustron, Wr. Neustadt, Austria
M.J. Barnes, T. Kramer
CERN, Geneva, Switzerland
M. Beerwald, D. Dirksen
Poynting GmbH, Dortmund, Germany

MedAustron is the Austrian centre for hadron therapy and non-clinical research. The beam chopper system is an essential component for patient safety in specific hazardous situations as well as for beam delivery from the synchrotron to the irradiation rooms. This paper presents the results from the development phase and the commissioning of the MedAustron beam chopper system. Details will be given on the design, the risk management, the test and the verification of the chopper power converter (PKC).

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WEPMN061

ESS PLC Controls Strategy

PLC, timing, controls, vacuum

3066

D.P. Piso, P. Arnold, S.L. Birch, T. Gahl, T. Korhonen, A. Nordt, J.G. Weisend
ESS, Lund, Sweden

The European Spallation Source ESS AB is an accelerator-driven neutron spallation source. The Integrated Controls System (ICS) division is responsible for providing controls and monitoring for all parts of the machine (accelerator, target, neutron scattering systems and conventional facilities). Also, Accelerator Division, Target Division and other parts of the organisation will be deploying PLC Automation Systems. A large number of applications have been identified across all the facility where PLCs will be used: cryogenics, vacuum, water-cooling, fluid systems, power systems, and safety \& protection systems. This work describes the different activities put in place and proposes the strategy followed at ESS regarding PLC technologies. This strategy consists not only of the standardisation of a PLC vendor but also testing activities, generation of documentation and standardization of other aspects (for instance, regarding installation). The documentation about PLC controls integration and standardisation and the approach to insert PLCs in the different controls workflows are described. Finally, the results of different tests (PLC timing correlation) are shown.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMN061

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WEPMN071

Enhanced Diagnostic Systems for the Supervision of the Superconducting Circuits of the LHC

operation, diagnostics, dipole, controls

3090

R. Denz, Z. Charifoulline, K. Dahlerup-Petersen, A.P. Siemko, J. Steckert
CERN, Geneva, Switzerland

Being an integral part of the protection system for the superconducting circuits of the LHC, the data acquisition systems used for the circuit supervision underwent a substantial upgrade during the first long shutdown of the LHC. The sampling rates and resolution of most of the acquired signals increased significantly. Newly added measurements channels like for the supervision of the quench heater circuits of the LHC main dipoles allow identifying specific fault states. All LHC main circuits are meanwhile equipped with earth voltage feelers allowing monitoring the electrical insulation strength, especially during the fast discharges. The protection system for the bus-bar splices is now capable to operate in different modes. By this measure, it is possible fulfilling the requirements for different specific tests like the warm bus-bar measurements and current stabilizer continuity measurements (CSCM) without field interventions.

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WEPTY084

Cooling Systems for the New 201.25 MHz Final Power Amplifiers at Los Alamos Neutron Science Center (LANSCE)

DTL, neutron, cavity, controls

3479

W.C. Barkley, C.E. Buechler, J.T.M. Lyles, A.C. Naranjo
LANL, Los Alamos, New Mexico, USA
D. Baca, R.E. Bratton
Compa Industries, Inc., Los Alamos, New Mexico, USA

Funding: Los Alamos National Laboratory, an affirmative action/equal opportunity employer, is operated by the University of California for the U.S. Department of Energy under contract W-7405-ENG-36.
Two new 201.25 MHz RF Final Power Amplifiers (FPAs) have been designed, fabricated, assembled, installed and successfully tested at the Los Alamos Neutron Science Center (LANSCE), in Module 2 of the Drift Tube Linac. These production units were fabricated at Continental Electronics Corporation. In this paper, we summarize the FPAs air and water cooling requirements and cooling systems.

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WEPWI029

Cavity Design, Fabrication and Test Performance of 750 MHz, 4-Rod Separators for CEBAF 4-Hall Beam Delivery System

cavity, simulation, coupling, target

3548

H. Wang, G. Cheng, L. Turlington, M.J. Wissmann
JLab, Newport News, Virginia, USA

Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
A short version of the original CEBAF normal conducting 4-rod separator cavity has been developed into a 750MHz one * since the concept of simultaneous 4-hall operation for CEBAF is introduced **. This work has been advanced further based on the EM design optimization, bench measurement and by conducting RF-thermal coupled simulation using CST and ANSYS to confirm the cavity tuning and thermal performance. The cavity fabrication used matured technology like copper plating and machining. The cavity flanges, couplers, tuners and cooling channels adopted consistent/compatible hardware with the existing 500MHz cavities. The electromagnetic and thermal design simulations have greatly reduced the prototyping and bench tuning time of the first prototype. Four production cavities have reached a typical 1.94MV kick voltage or 3.0kW wall loss on each cavity after a minor multipactoring or no processing, 7.5% overhead power than the design specification.
* R. Kazimi et al., IPAC2013, Shanghai, China, pp 2896-2898.
** R. Kazimi, IPAC2013, Shanghai, China, pp 3502-3504.

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THPF090

Status and Plans for the Upgrade of the CERN PS Booster

injection, proton, booster, cavity

3905

K. Hanke, D. Aguglia, M.E. Angoletta, W. Bartmann, C. Bedel, E. Benedetto, S. Bertolasi, C. Bertone, J. Betz, T.W. Birtwistle, A. Blas, J. Borburgh, C. Bracco, A.C. Butterworth, E. Carlier, S. Chemli, P. Dahlen, A. Dallocchio, G.P. Di Giovanni, T. Dobers, A. Findlay, R. Froeschl, A. Funken, S. Gabourin, J.L. Grenard, D. Grenier, J. Hansen, D. Hay, J.-M. Lacroix, P. Le Roux, L.A. Lopez Hernandez, C. Martin, A. Masi, B. Mikulec, Y. Muttoni, A. Newborough, D. Nisbet, M.R. Obrecht, M.M. Paoluzzi, S. Pittet, B. Puccio, J. Tan, J. Vollaire, W.J.M. Weterings
CERN, Geneva, Switzerland

CERN’s Proton Synchrotron Booster (PSB) is undergoing a major upgrade program in the frame of the LHC Injectors Upgrade (LIU) project. During the first long LHC shutdown (LS1) some parts of the upgrade have already been implemented, and the machine has been successfully re-commissioned. More work is planned for the upcoming end-of-year technical stops, notably in 2016/17, while most of the upgrade is planned to take place during the second long LHC shutdown (LS2). We report on the upgrade items already completed and commissioned, the first Run 2 beam performance and give a status of the ongoing design and integration work.

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FRYGB1

High Power Proton Beam Facilities: Operational Experience, Challenges, and the Future

target, proton, rfq, operation

4102

S.M. Cousineau
ORNL, Oak Ridge, Tennessee, USA

High power proton accelerators are increasingly popular as drivers for secondary beams with a large variety of applications, such as neutron sources for materials science and neutrino factories for high energy physics. In the last few decades, average beam powers have increased substantially, giving rise to an array of challenges centered on providing high beam power and availability while maintaining low activation levels. This talk summarizes the current status of high power proton accelerators. It discusses recent operational experiences and lessons learned, and identifies the primary hardware and beam dynamics limitations. A brief review of planned next generation facilities and driving technologies is also presented.

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