IPAC2014 - List of Keywords (power-supply)

Paper	Title	Other Keywords	Page
MOPRO023	SuperKEKB Beam abort System	kicker, quadrupole, extraction, sextupole	116
	T. Mimashi, N. Iida, M. Kikuchi, T. Mori KEK, Ibaraki, Japan K. Abe Hitachi Power Semiconductor Device, Ltd., Hitachishi, Ibaraki, Japan A. Sasagawa KYOCERA Corporation, Higashiomi-city, Shiga, Japan A. Tokuchi Pulsed Power Japan Laboratory Ltd., Kusatsu-shi Shiga, Japan
	The abort system of the SuperKEKB is described. The beam abort system consists of the beam abort kicker magnets, pulsed quadrupole magnets, a lambertson septum magnet and extracted window. The dumped beam is extracted with beam abort kicker through the extraction window. The pulsed quadrupole magnets make the beam spot size large at the window. The damages of the extraction window is tested with KEKB beam. The pulsed kicker power supply is under development.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO023
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MOPRO087	High Voltage Generators Upgrade of Siberia-2 Injection System	kicker, injection, operation, high-voltage	292
	S.I. Tomin, A. Belkov, V. Korchuganov, I. Kuzmin, K. Kuznetsov NRC, Moscow, Russia
	The injection system is one of the important systems which determine efficiency and reliability of the accelerator facility. The spark gap switches (SGS), which were used before at Siberia-2 in high voltage nanosecond pulse generators, are the critical components requiring permanent maintenance. SGS has a series of limitations such as a relatively large pulse jitter and a work at a high pressure nitrogen atmosphere. The new injection system uses new half-sine microsecond pulse generators which based on Pseudo-Spark Switches. Some technical aspects of the new injection system are considered and results of generators operation are shown in the article.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO087
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MOPME051	Turbo Generators for Powering the HV-solenoids at the HESR Electron Cooler	solenoid, electron, high-voltage, acceleration	492
	A. Hofmann, K. Aulenbacher, M.W. Bruker, J. Dietrich, T. Weilbach HIM, Mainz, Germany M.I. Bryzgunov, A.P. Denisov, V.M. Panasyuk, V.V. Parkhomchuk, V.B. Reva BINP SB RAS, Novosibirsk, Russia
	New experiments at the planned 'High Energy Storage Ring' (HESR) require magnetised electron cooling. One of the challenges is the powering of the HV-solenoids, because they are located on HV-sections, which sit on an electrical potential inside a high voltage vessel. We discuss a Multi-MV system where the solenoids are powered by a series of cascade transformers which are in turn supplied by turbogenerators. The usage of SF6 as turbine fluid is desirable from the viewpoint of operational stability and may also lead to energy efficient operation of the turboexpanders since a Organic Rankine-cycle (so-called ORC-process) may be used instead of electrically driven compressors. The paper gives an overview of the turbo generator and ORC project: an introduction, a status report and a road map will be given.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME051
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MOPME054	Upgrade of the Elettra Magnet Power Supply Controllers	controls, interface, electronics, operation	495
	S. Cleva, M. Cautero, T.M. Cieśla, M. Lonza, L. Pivetta, C. Scafuri, R. Visintini Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Ageing of devices and components phasing-out, as well as the increasing maintenance costs, affect particle accelerators similarly to any industrial plant. A careful maintenance plan can cope with these problems in the medium-term, but then a complete update of the oldest parts is required. The most recent technologies available on the market together with a modular and open design approach are the basis of an upgrade program aimed at replacing the existing controllers of the Elettra storage ring magnet power supplies. The design considerations, the constraints and the first results are reported.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME054
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MOPME055	Design and Construction of a Remote Control for the CADS Digital Power Supplies	controls, FPGA, EPICS, hardware	498
	Y.Y. Du, J.S. Cao, Q. Ye IHEP, Beijing, People's Republic of China
	A remote controlled power supply system includes a data processing system and control at least 76 power supplies, which is designed for the China Accelerator Driven Subcritical system (C-ADS) power supplies system. The system Construction in the mode of integrated control with 1U chassis board, and the hardware parts control core based on Field Programmable Gate Array (FPGA). The software part adopts Experimental Physics and Industrial Control System (EPICS) platform with database and TCP/IP protocol, the administrators can acquire the working parameter through a remote control equipment and control the power supply at the remote site.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME055
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MOPME057	A High-Performance Digital Controller based on Ethernet Interface for Accelerator Power Supply	controls, Ethernet, interface, dipole	501
	R. Li, S.Q. Tan, W.F. Wu, R.N. Xu SINAP, Shanghai, People's Republic of China
	Accelerator applications need extremely precise and highly digitized power supplies for various magnets. A new digital controller for accelerator power supply was developed and implemented. It is a high-performance and multifunctional digital controller which with dual-processor system and Ethernet interface. Due to the digital controller's high resolution Analog to Digital Converter, high resolution Pulse-Width Modulation generator and precise timing design, it can precisely control the accelerator power supply output static or dynamic output. In addition, it also performed well on multi-controller's synchronous control.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME057
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MOPME058	The Magnet Power Supply for PAL-XFEL	controls, FPGA, embedded, feedback	504
	K.-H. Park, Y.-G. Jung, D.E. Kim, I.S. Ko, H.-G. Lee, S.B. Lee, H.S. Suh PAL, Pohang, Kyungbuk, Republic of Korea W.S. Choi, M.J. Kim POSTECH, Pohang, Kyungbuk, Republic of Korea
	A magnet power supply (MPS) for PAL-XFEL was developed, which is the bipolar type with the power capacity of 3.6KW. The MPS has been implemented by the digital signal processing technology using the DSP, FPGA, ADCs and so on. An embedded module was adapted for the Ethernet connection for EPCIS. The output current stability of the MPS showed about 10 ppm peak-to-peak in long term experiment. The measured accuracy was less than 10ppm in full range. The other experimental results such as repeatability and zero-cross response were given in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME058
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MOPME061	Design of a Three Legs and Phase Shift AC to DC Converter for Taiwan Photon Light Source	controls, feedback, operation, electronics	511
	Y.S. Wong, K.-B. Liu NSRRC, Hsinchu, Taiwan J.F. Chen, W.C. Hsu, W.C. Hung, P.H. Tseng NCKU, Tainan city, Taiwan
	A novel low voltage high current AC/DC converter will be achieved which input is utility power supplies a low voltage DC output to load. The new three legs phase shift AC / DC power supply, can divided to five parts : diode full bridge rectifier, three legs phase shift control circuits, transformers, double inductor circuit and feedback circuit. Circuit operates as a single-phase 110 Vrms AC mains power input three legs phase shift control mode from the diode bridge rectifier circuit, the output voltage through the transformer and the phase shift control method converts to low voltage DC 12V output and supplies to loading, feedback circuit are using a feedback resistor across the filter capacitor voltage to product a feedback signal. Digital signal processing (DSP) control board by a feedback voltage determines the three legs phase shift displacement in order to control the output voltage keep a constant value 12V. For this circuit have a zero voltage switching characteristics of the three legs phase shift mode power supply, the input voltage for single phase 110Vac and output load power is 12V/20A.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME061
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MOPME062	The Acceptance Measurement Platform for TPS Corrector Magnet Power Supplies	data-acquisition, interface, controls, feedback	514
	B.S. Wang, Y.-C. Chien, C.-Y. Liu, K.-B. Liu, Y.S. Wong NSRRC, Hsinchu, Taiwan
	This paper presents an implementation of a multi-channel measuring data acquisition interface of corrector magnet power supplies (CMPS) for Taiwan Photon source (TPS) with LabVIEW as the developing tool. The multi-channel measuring data acquisition interface could reduce quantity of measurement instrument and loading of operator at the CMPS acceptance test. The instrument devices of measurement system include a multiplexer 、a dynamic signal analyzer (DSA) and a high-resolution digital voltage meter (DVM), GPIB is the communication interface between the multi-channel measuring data acquisition interface and instruments. There are two analyzing procedure for the output current of MPS in the default setting of the LabVIEW program, 1) Fast Fourier Transform of output current measured by DSA, 2) long-term stability of output current measured by DVM; after these two analyzing procedure is completed, the performance of each MPS can be automatically generated as a Microsoft Word report file.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME062
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MOPME066	Development of 400 kA Pulsed Power Supply for Magnetic Horn at FAIR Antiproton Target	antiproton, radiation, operation, coupling	517
	S.S. Mohite, R. Hettinger, K. Knie, I.J. Petzenhauser GSI, Darmstadt, Germany
	This report presents an overview of the magnetic horn and its pulsed power system at the upcoming FAIR (Facility for Antiproton and Ion Research) complex at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. In the planned antiproton (pbar) separator scheme a magnetic horn will be used as a device for collection and focusing of highly divergent antiprotons emerging from the target with energies around 3 GeV and within a cone of about 80 mrad .To achieve the desired focusing effect, the horn needs to be powered with a current pulse of 400 kA peak amplitude at the same repetition rate as the primary proton beam, i.e. 0.1 Hz. In future, operation up to 0.2 Hz is planned without major design alterations. Due to civil construction and radiation protection limitations, possible technical realization of this system has some key design issues. The aim is to develop a reliable and efficient magnetic horn system for effective focusing of antiprotons by producing a very strong pulsed magnetic field.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME066
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MOPME072	Pulse Power Supplies for the Dipole Kickers of MAX-IV and Solaris Storage Rings	kicker, controls, storage-ring, dipole	535
	A.A. Korepanov, A.A. Eliseev, A. Panov, A.A. Starostenko BINP SB RAS, Novosibirsk, Russia
	For initial operation of the MAX-IV and Solaris storage rings the single dipole kickers were decided to use. The pulsers wich drive the magnets have the following requirements: current amplitude up to 4kA (3 GeV ring), pulse length 0.6us (1.5 GeV ring) and 3.5us (3 GeV ring), pulse amplitude stability ±0.1%, timing jitter <±5ns, maximium repetition frequency 10 Hz. The design and test results of the pulse power supplies are presented in the paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME072
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MOPRI014	Extracting a High Current Long Pulse Hminus Beam for FETS	extraction, ion, ion-source, solenoid	611
	D.C. Faircloth, M. Cannon, S.R. Lawrie, M. Perkins STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom C. Gabor STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
	The Front End Test Stand (FETS) at the Rutherford Appleton Laboratory (RAL) requires a 60 mA 2 ms 50 Hz Hminus beam. A Penning Surface Plasma Source is used to produce the beam. This paper gives the latest results obtained using a new 25 kV long pulse extraction power supply designed and built at RAL. Power supply performance, beam current and emittance are detailed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI014
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TUPRO090	Special Elettra Corrector Magnets	dipole, controls, vacuum, sextupole	1247
	E. Karantzoulis, D. Castronovo, S. Krecic, G.L. Loda Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	To fully control the beam position source point for the dipole beam lines additional correctors are needed. The space available however is minimal and no alternative solution (e.g. additional coils on quadrupoles or sextupoles) is possible making the design of such a magnet very challenging. The design, installation and performance of those special magnets is presented and discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO090
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TUPME039	System Integration of the Demonstration Siemens Electrostatic Accelerator	high-voltage, ion-source, ion, experiment	1440
	H. von Jagwitz-Biegnitz JAI, Oxford, United Kingdom P. Beasley, S. Goßmann-Levchuk, O. Heid Siemens AG, Erlangen, Germany D.C. Faircloth STFC/RAL, Chilton, Didcot, Oxon, United Kingdom R.G. Selway Inspired Engineering Ltd, Climping, United Kingdom
	Siemens has proposed a novel compact DC electrostatic tandem accelerator to produce protons of a few MeV. Siemens is currently building a prototype of the accelerator at the Rutherford Appleton Laboratory. This paper reports on recent progress on the different components of the system as well as the commissioning of the whole machine.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPME039
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WEPRO011	Design Study of Pulsed Multipole Injection for Aichi SR	injection, multipole, storage-ring, electron	1962
	N. Yamamoto, M. Hosaka, A. Mano, T. Takano, Y. Takashima Nagoya University, Nagoya, Japan M. Katoh UVSOR, Okazaki, Japan
	Since March of 2013 the user operation has been started with the top-up injection mode of the storage ring at Aich SR.The accelerators of Aichi SR consisted with a 50 MeV linac, an 1.2 GeV full energy booster and the storage ring. The　operation current of the storage ring is 300 mA and the injection rate is up to 1 Hz. The single bunch injection scheme is　employed and the electron beam can be injected into the arbitrary bucket of the storage ring. Up to now, the stabilitiy of 0.2 % for the stored beam current was achieved, however, the coherent oscillation of stored beams due to injection kikers is also obserbed. In order to introduce the new injection scheme into Aichi SR and to suppress that coherent oscillation, we have designed the pulsed multipole injection system. The system consists of the sextupole-like pulsed magnet and the micro-sec responce power supply. In the paper, we will report the results of beam tracking calculations with our designed magnet and power supply.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO011
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WEPRO072	The Design of the Fast Raster System for the European Spallation Source	target, timing, controls, linac	2118
	H.D. Thomsen, S.P. Møller ISA, Aarhus, Denmark
	The ESS will nominally operate with an average (peak) proton current of 2.5 mA (62.5 mA) at 2.0 GeV. To reduce the beam peak current density at the spallation target, the ESS HEBT will apply a fast transverse raster system consisting of 8 dithering magnet dipoles. The raster system sweeps the linac beamlet on the target surface and gives a rectangular intensity outline within a macropulse of 2.86 ms. The magnets are driven by triangular current waveforms of up to 40 kHz. The preliminary magnet design and power supply topology will be discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO072
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WEPME006	DESIGN AND CONSTRUCTION OF A 4 KW, 500 MHZ SOLID STATE RF AMPLIFIER AT IRANIAN LIGHT SOURCE FACILITY (ILSF)	network, insertion, storage-ring, booster	2264
	A. Shahverdi, H. Ajam, H. Ghasem, Kh.S. Sarhadi ILSF, Tehran, Iran
	Solid state RF power amplifiers have been considered as an attractive candidate for providing the high power RF power required in increasing number of accelerator applications in recent years. Due to the advantages of these amplifiers and based on the successful experience done in other light sources; ILSF RF group has started R&D in design and fabrication of solid state amplifiers. Two modules based on two different LDMOS transistors have been developed successfully at 500MHz. The measured characteristics are presented and compared in this paper. Combining of 8 such modules is under test to achieve 4kW output power as the first stage of the conceptually designed combining network. This paper outlines the design concept of the different parts of the amplifiers and presents the experimental results obtained so far.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME006
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WEPME020	Commissioning of the MICE RF System	operation, experiment, cavity, high-voltage	2297
	A.J. Moss, A.E. Wheelhouse STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom S.M.H. Alsari Imperial College of Science and Technology, Department of Physics, London, United Kingdom A.J. Dick, K. Ronald, D.C. Speirs, C.G. Whyte USTRAT/SUPA, Glasgow, United Kingdom T. Stanley STFC/RAL, Chilton, Didcot, Oxon, United Kingdom C.J. White STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
	The Muon Ionisation Cooling Experiment (MICE) is being constructed at Rutherford Appleton Laboratory in the UK. The muon beam will be cooled using multiple hydrogen absorbers then reaccelerated using an RF cavity system operating at 201MHz. This paper describes recent progress in commissioning the amplifier systems at their design operation conditions, installation and operation within the Ionisation Cooling Test Facility (ICTF) as part of the MICE project.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME020
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WEPME021	Solid-state Pulsed Klystron Transmitters	klystron, high-voltage, operation, flattop	2300
	K. Schrock, C. Chipman, M.P.J. Gaudreau, B.E. Simpson Diversified Technologies, Inc., Bedford, Massachusetts, USA
	Funding: Lawrence Berkeley National Laboratory Daresbury Laboratory Diversified Technologies, Inc. (DTI) is currently building and will deliver in early 2014 two solid-state pulsed klystron transmitters. Though not identical, the units are similar in design, and will be delivered to Lawrence Berkeley National Laboratory (LBNL) and Daresbury Laboratory in England. DTI’s goal across these two projects is to develop a complete package which can subsequently be marketed in the high peak power laboratory transmitter market. The modulator is a pulse transformer-coupled hybrid system, including ancillary klystron components (i.e., focus coil, socket) but not the actual klystron tube. Both systems employ a relatively simple modulator, consisting of an energy storage capacitor, a high voltage series switch, a step-up pulse transformer, and a passive pulse-flattening circuit. This arrangement gives an extremely flat pulse and allows the use of a moderate value of storage capacitor. The DTI switch can open or close as commanded, so the pulse width is adjusted by the gate pulse to the system.
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WEPME058	Development of Thin Films for Superconducting RF Cavities	SRF, superconductivity, scattering, lattice	2406
	S. Wilde, B. Chesca Loughborough University, Loughborough, Leicestershire, United Kingdom A.N. Hannah, D.O. Malyshev, O.B. Malyshev, S.M. Pattalwar, R. Valizadeh STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom G.B.G. Stenning STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
	Superconducting coatings for superconducting radio frequency (SRF) cavities is an intensively developing field that should ultimately lead to acceleration gradients better than those obtained by bulk Nb RF cavities. ASTeC has built and developed experimental systems for superconducting thin-film deposition, surface analysis and measurement of Residual Resistivity Ratio (RRR). Nb thin-films were deposited by magnetron sputtering in DC or pulsed DC mode (100 to 350 kHz with 50% duty cycle) with powers ranging from 100 to 600 W at various temperatures ranging from room temperature to 800 °C on Si (100) substrates. The first results gave RRR in the range from 2 to 22 with a critical temperature Tc=~9.5 K. Scanning electron microscopy (SEM), x-ray diffraction (XRD), electron back scattering diffraction (EBSD) and DC SQUID magnetometry revealed significant correlations between the film structure, morphology and superconducting properties.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPME058
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THYB01	Status and Trends in Magnet Power Converter Technology for Accelerators	controls, synchrotron, booster, FPGA	2822
	F. Long IHEP, Beijing, People's Republic of China
	Power converters (PC) is one of the key technologies for accelerators. During recent years with the development of power semiconductor devices, optimization of topologies, and improvement of manufacturing, the voltage and current ratings and power densities have greatly increased for PCs. Various PCs are required for various magnets in accelerators, but in principle the design for main topologies and the methodology for stabilizing the output are similar. Main topologies, digital control systems，and considerations for the future about the magnet PC are briefly discussed in this presentation.
	Slides THYB01 [2.477 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THYB01
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THPRO111	Control System for BEPCII Linac Power Sub-system	controls, EPICS, operation, linac	3156
	X. Wu, X.C. Kong, Q. Le, S. Sun, Y. Zou IHEP, Beijing, People's Republic of China
	Power subsystem has been upgraded for energy improvement of the BEPCII Linac. As a result, new control system was in need. This paper proposes the designing and implementation about the power-supply control system. There are 156 sets of power supply in the system, which is divided into 6 parts, according to function. The control system is intended to make operations more convenient and efficient in beam regulation, which provides functions to meet such situations, like single regulation; restore the beam configures from data files; one-button to switch the electronic polarity (E-/E+). What’s more, the software provides a method of slow-change to protect the power supplies, when value change is too steep. Compare to the old system, this new software is more maintainable and extensible. This software is based on Qt, the GUI library for C++, and connects to the control box through the EPICS (Experimental Physics and Industrial Control System). The whole 156 sets of power supply are controlled by control boxes, which is ARM+FPGA (CPLD)-Structure front-end IO. This control system has assembled in BEPCII LINAC in September, which plays an important part in the following working.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRO111
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THPRO121	Control Environment of Power Supply for TPS Booster Synchrotron	controls, booster, quadrupole, dipole	3174
	P.C. Chiu, Y.-S. Cheng, K.T. Hsu, K.H. Hu, D. Lee, K.-B. Liu, B.S. Wang, C.Y. Wu NSRRC, Hsinchu, Taiwan
	The TPS is a latest generation of high brightness synchrotron light source and ready for commissioning. It consists of a 150 MeV electron linac, a booster synchrotron, a 3 GeV storage ring, and experimental beam lines. The booster is designed to ramp electron beams from 150 MeV to 3 GeV in 3 Hz. The TPS control environment is based on EPICS framework to support rich functionalities including power supply control, waveform management, vacuum interface, BPM, intensity monitoring support, operation supports, and so on. This report summarizes the efforts on control environment development for TPS booster synchrotron.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRO121
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THPRO122	Control System of the Taiwan Photon Source for Commissioning	controls, EPICS, interface, Ethernet	3177
	Y.-S. Cheng, Y.-T. Chang, J. Chen, P.C. Chiu, K.T. Hsu, S.Y. Hsu, K.H. Hu, C.H. Huang, C.H. Kuo, D. Lee, C.Y. Liao, C.-J. Wang, C.Y. Wu NSRRC, Hsinchu, Taiwan
	Control system for the Taiwan Photon Source (TPS) project was implemented. The system is ready for commissioning of the accelerators. Final integration test is in proceeding. The EPICS was chosen as control system framework. The subsystems control interfaces include event based timing system, Ethernet based power supply control, corrector power supply control, PLC-based pulse magnet power supply control and machine protection system, insertion devices motion control system, various diagnostics, and etc. The standard hardware components had been installed and integrated, and the various IOCs (Input Output Controller) are implemented as various subsystems control platforms. Development and test of the high level and low level software systems are in proceeding. The efforts will be summarized at this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRO122
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THPME060	Malfunction, Cause and Recurrence Prevention Measures of J-PARC Slow Extraction	extraction, target, quadrupole, controls	3370
	M. Tomizawa, T. Kimura, H. Nakagawa, K. Okamura KEK, Ibaraki, Japan
	The radiation leakage accident occurred at the J-PARC hadron experimental hall in May 2013 was triggered by a target damage due to an unanticipated short beam pulse from J-PARC main ring. An extremely short beam pulse was produced by a rapid current increase of the quadrupole (EQ) power supply system for a spill feedback. A simulation with the slow extraction process could explain such a short beam pulse generation. The cause of the malfunction has been identified by an intensive investigation of the EQ power supply system performed after the accident. We will show measures to prevent recurrence.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME060
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THPME061	Present Status of J-PARC - after the Shutdown due to the Radioactive Material Leak Accident-	linac, operation, injection, target	3373
	T. Koseki KEK, Ibaraki, Japan K. Hasegawa JAEA/J-PARC, Tokai-mura, Japan
	In J-PARC, a radioactive material leak accident occurred at the Hadron Experimental Facility on May 23, 2013. The accident was triggered by a malfunction of the slow extraction system of the Main Ring synchrotron. After seven-month long shutdown due to the accident, beam operation of the linac was restarted in December 2013. In this paper, the most recent status of the beam operation is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME061
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THPME064	Progress and Status of the J-PARC 3GeV RCS	injection, operation, linac, vacuum	3382
	M. Kinsho JAEA/J-PARC, Tokai-mura, Japan
	Big issue for the J-PARC 3GeV RCS was displacement of main magnets caused by last big earthquake because this made beam loss more than 400 kW beam power. Since realignment of main magnet and other components was essential to realize higher beam power and stable operation, this work has been done last maintenance period. To minimize amount of realignment work, we decided that not all components moved to designed regular potions but also minimum components moved to the position which was secured design acceptance 486 π mm mrad. Almost all components which are main magnets, rf cavities, and extraction magnets had to be moved in the range of 10 mm for horizontal, 3 mm for vertical and 9 mm for longitudinal, respectively. It was not necessary for the components installed in injection straight line to move because displacement of these components was less than ± 0.2 mm. At same time 400 MeV injection upgrade work should be done. Beam commissioning is planned from the middle of January 2014. The progress and status of the RCS in J-PARC are presented.
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THPME200	Status of the Utility System Construction for the 3 GeV TPS Storage Ring	storage-ring, booster, controls, operation	3751
	J.-C. Chang, W.S. Chan, C.S. Chen, J.-R. Chen, Y.-C. Chung, C.W. Hsu, K.C. Kuo, Y.-C. Lin, C.Y. Liu, Y.-H. Liu, Z.-D. Tsai, T.-S. Ueng NSRRC, Hsinchu, Taiwan
	The construction of the utility system for the 3.0 GeV Taiwan Photon Source (TPS) was started in the end of 2009. The utility building for the TPS ring had been completed in the end of 2013. The building use license had been approved in Sep. 2013. The whole construction engineering has been completed. The acceptance test is scheduled on July 2014. Total budget of this construction is about four million dollars. This utility system presented in this paper includes the cooling water, air conditioning, electrical power, and compressed air systems.
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THPRI027	Automated Conditioning System for Siemens Novel Electrostatic Accelerator	software, vacuum, interface, controls	3825
	H. von Jagwitz-Biegnitz JAI, Oxford, United Kingdom P. Beasley, O. Heid, T. Kluge Siemens AG, Erlangen, Germany D.C. Faircloth STFC/RAL, Chilton, Didcot, Oxon, United Kingdom R.G. Selway Inspired Engineering Ltd, Climping, United Kingdom
	Siemens has proposed a novel compact DC electrostatic tandem accelerator to produce protons of a few MeV and is currently commissioning a prototype at the Rutherford Appleton Laboratory. The geometry of the accelerator involves large surfaces which are exposed to high electric fields and therefore need long procedures for conditioning. An automated system for conditioning has been developed. It reacts quicker to breakdowns than a human operator could do, thus being more effective and also reduces the time spent by research staff on the conditioning.
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FRXAB01	Trends in RF Technology for Applications to Light Sources with Great Average Power	klystron, operation, rf-amplifier, high-voltage	4065
	Ch. Wang NSRRC, Hsinchu, Taiwan
	RF systems are a major part of both the capital and operating costs of contemporary light sources and directly impact their capability, reliability and availability. The RF community has been discussing for many years the best choice of CW RF power source for light sources. In the domain of great average power, the choice is among a klystron, inductive-output tube, and solid-state RF amplifier. Here we review their current development and challenges and offer a perspective from a point of view of operating a light source with high reliability and availability.
	Slides FRXAB01 [4.033 MB]
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Paper

Title

Other Keywords

Page

MOPRO023

SuperKEKB Beam abort System

kicker, quadrupole, extraction, sextupole

116

T. Mimashi, N. Iida, M. Kikuchi, T. Mori
KEK, Ibaraki, Japan
K. Abe
Hitachi Power Semiconductor Device, Ltd., Hitachishi, Ibaraki, Japan
A. Sasagawa
KYOCERA Corporation, Higashiomi-city, Shiga, Japan
A. Tokuchi
Pulsed Power Japan Laboratory Ltd., Kusatsu-shi Shiga, Japan

The abort system of the SuperKEKB is described. The beam abort system consists of the beam abort kicker magnets, pulsed quadrupole magnets, a lambertson septum magnet and extracted window. The dumped beam is extracted with beam abort kicker through the extraction window. The pulsed quadrupole magnets make the beam spot size large at the window. The damages of the extraction window is tested with KEKB beam. The pulsed kicker power supply is under development.

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MOPRO087

High Voltage Generators Upgrade of Siberia-2 Injection System

kicker, injection, operation, high-voltage

292

S.I. Tomin, A. Belkov, V. Korchuganov, I. Kuzmin, K. Kuznetsov
NRC, Moscow, Russia

The injection system is one of the important systems which determine efficiency and reliability of the accelerator facility. The spark gap switches (SGS), which were used before at Siberia-2 in high voltage nanosecond pulse generators, are the critical components requiring permanent maintenance. SGS has a series of limitations such as a relatively large pulse jitter and a work at a high pressure nitrogen atmosphere. The new injection system uses new half-sine microsecond pulse generators which based on Pseudo-Spark Switches. Some technical aspects of the new injection system are considered and results of generators operation are shown in the article.

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MOPME051

Turbo Generators for Powering the HV-solenoids at the HESR Electron Cooler

solenoid, electron, high-voltage, acceleration

492

A. Hofmann, K. Aulenbacher, M.W. Bruker, J. Dietrich, T. Weilbach
HIM, Mainz, Germany
M.I. Bryzgunov, A.P. Denisov, V.M. Panasyuk, V.V. Parkhomchuk, V.B. Reva
BINP SB RAS, Novosibirsk, Russia

New experiments at the planned 'High Energy Storage Ring' (HESR) require magnetised electron cooling. One of the challenges is the powering of the HV-solenoids, because they are located on HV-sections, which sit on an electrical potential inside a high voltage vessel. We discuss a Multi-MV system where the solenoids are powered by a series of cascade transformers which are in turn supplied by turbogenerators. The usage of SF6 as turbine fluid is desirable from the viewpoint of operational stability and may also lead to energy efficient operation of the turboexpanders since a Organic Rankine-cycle (so-called ORC-process) may be used instead of electrically driven compressors. The paper gives an overview of the turbo generator and ORC project: an introduction, a status report and a road map will be given.

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MOPME054

Upgrade of the Elettra Magnet Power Supply Controllers

controls, interface, electronics, operation

495

S. Cleva, M. Cautero, T.M. Cieśla, M. Lonza, L. Pivetta, C. Scafuri, R. Visintini
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Ageing of devices and components phasing-out, as well as the increasing maintenance costs, affect particle accelerators similarly to any industrial plant. A careful maintenance plan can cope with these problems in the medium-term, but then a complete update of the oldest parts is required. The most recent technologies available on the market together with a modular and open design approach are the basis of an upgrade program aimed at replacing the existing controllers of the Elettra storage ring magnet power supplies. The design considerations, the constraints and the first results are reported.

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MOPME055

Design and Construction of a Remote Control for the CADS Digital Power Supplies

controls, FPGA, EPICS, hardware

498

Y.Y. Du, J.S. Cao, Q. Ye
IHEP, Beijing, People's Republic of China

A remote controlled power supply system includes a data processing system and control at least 76 power supplies, which is designed for the China Accelerator Driven Subcritical system (C-ADS) power supplies system. The system Construction in the mode of integrated control with 1U chassis board, and the hardware parts control core based on Field Programmable Gate Array (FPGA). The software part adopts Experimental Physics and Industrial Control System (EPICS) platform with database and TCP/IP protocol, the administrators can acquire the working parameter through a remote control equipment and control the power supply at the remote site.

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MOPME057

A High-Performance Digital Controller based on Ethernet Interface for Accelerator Power Supply

controls, Ethernet, interface, dipole

501

R. Li, S.Q. Tan, W.F. Wu, R.N. Xu
SINAP, Shanghai, People's Republic of China

Accelerator applications need extremely precise and highly digitized power supplies for various magnets. A new digital controller for accelerator power supply was developed and implemented. It is a high-performance and multifunctional digital controller which with dual-processor system and Ethernet interface. Due to the digital controller's high resolution Analog to Digital Converter, high resolution Pulse-Width Modulation generator and precise timing design, it can precisely control the accelerator power supply output static or dynamic output. In addition, it also performed well on multi-controller's synchronous control.

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MOPME058

The Magnet Power Supply for PAL-XFEL

controls, FPGA, embedded, feedback

504

K.-H. Park, Y.-G. Jung, D.E. Kim, I.S. Ko, H.-G. Lee, S.B. Lee, H.S. Suh
PAL, Pohang, Kyungbuk, Republic of Korea
W.S. Choi, M.J. Kim
POSTECH, Pohang, Kyungbuk, Republic of Korea

A magnet power supply (MPS) for PAL-XFEL was developed, which is the bipolar type with the power capacity of 3.6KW. The MPS has been implemented by the digital signal processing technology using the DSP, FPGA, ADCs and so on. An embedded module was adapted for the Ethernet connection for EPCIS. The output current stability of the MPS showed about 10 ppm peak-to-peak in long term experiment. The measured accuracy was less than 10ppm in full range. The other experimental results such as repeatability and zero-cross response were given in this paper.

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MOPME061

Design of a Three Legs and Phase Shift AC to DC Converter for Taiwan Photon Light Source

controls, feedback, operation, electronics

511

Y.S. Wong, K.-B. Liu
NSRRC, Hsinchu, Taiwan
J.F. Chen, W.C. Hsu, W.C. Hung, P.H. Tseng
NCKU, Tainan city, Taiwan

A novel low voltage high current AC/DC converter will be achieved which input is utility power supplies a low voltage DC output to load. The new three legs phase shift AC / DC power supply, can divided to five parts : diode full bridge rectifier, three legs phase shift control circuits, transformers, double inductor circuit and feedback circuit. Circuit operates as a single-phase 110 Vrms AC mains power input three legs phase shift control mode from the diode bridge rectifier circuit, the output voltage through the transformer and the phase shift control method converts to low voltage DC 12V output and supplies to loading, feedback circuit are using a feedback resistor across the filter capacitor voltage to product a feedback signal. Digital signal processing (DSP) control board by a feedback voltage determines the three legs phase shift displacement in order to control the output voltage keep a constant value 12V. For this circuit have a zero voltage switching characteristics of the three legs phase shift mode power supply, the input voltage for single phase 110Vac and output load power is 12V/20A.

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MOPME062

The Acceptance Measurement Platform for TPS Corrector Magnet Power Supplies

data-acquisition, interface, controls, feedback

514

B.S. Wang, Y.-C. Chien, C.-Y. Liu, K.-B. Liu, Y.S. Wong
NSRRC, Hsinchu, Taiwan

This paper presents an implementation of a multi-channel measuring data acquisition interface of corrector magnet power supplies (CMPS) for Taiwan Photon source (TPS) with LabVIEW as the developing tool. The multi-channel measuring data acquisition interface could reduce quantity of measurement instrument and loading of operator at the CMPS acceptance test. The instrument devices of measurement system include a multiplexer 、a dynamic signal analyzer (DSA) and a high-resolution digital voltage meter (DVM), GPIB is the communication interface between the multi-channel measuring data acquisition interface and instruments. There are two analyzing procedure for the output current of MPS in the default setting of the LabVIEW program, 1) Fast Fourier Transform of output current measured by DSA, 2) long-term stability of output current measured by DVM; after these two analyzing procedure is completed, the performance of each MPS can be automatically generated as a Microsoft Word report file.

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MOPME066

Development of 400 kA Pulsed Power Supply for Magnetic Horn at FAIR Antiproton Target

antiproton, radiation, operation, coupling

517

S.S. Mohite, R. Hettinger, K. Knie, I.J. Petzenhauser
GSI, Darmstadt, Germany

This report presents an overview of the magnetic horn and its pulsed power system at the upcoming FAIR (Facility for Antiproton and Ion Research) complex at GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. In the planned antiproton (pbar) separator scheme a magnetic horn will be used as a device for collection and focusing of highly divergent antiprotons emerging from the target with energies around 3 GeV and within a cone of about 80 mrad .To achieve the desired focusing effect, the horn needs to be powered with a current pulse of 400 kA peak amplitude at the same repetition rate as the primary proton beam, i.e. 0.1 Hz. In future, operation up to 0.2 Hz is planned without major design alterations. Due to civil construction and radiation protection limitations, possible technical realization of this system has some key design issues. The aim is to develop a reliable and efficient magnetic horn system for effective focusing of antiprotons by producing a very strong pulsed magnetic field.

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MOPME072

Pulse Power Supplies for the Dipole Kickers of MAX-IV and Solaris Storage Rings

kicker, controls, storage-ring, dipole

535

A.A. Korepanov, A.A. Eliseev, A. Panov, A.A. Starostenko
BINP SB RAS, Novosibirsk, Russia

For initial operation of the MAX-IV and Solaris storage rings the single dipole kickers were decided to use. The pulsers wich drive the magnets have the following requirements: current amplitude up to 4kA (3 GeV ring), pulse length 0.6us (1.5 GeV ring) and 3.5us (3 GeV ring), pulse amplitude stability ±0.1%, timing jitter <±5ns, maximium repetition frequency 10 Hz. The design and test results of the pulse power supplies are presented in the paper.

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MOPRI014

Extracting a High Current Long Pulse Hminus Beam for FETS

extraction, ion, ion-source, solenoid

611

D.C. Faircloth, M. Cannon, S.R. Lawrie, M. Perkins
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
C. Gabor
STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom

The Front End Test Stand (FETS) at the Rutherford Appleton Laboratory (RAL) requires a 60 mA 2 ms 50 Hz Hminus beam. A Penning Surface Plasma Source is used to produce the beam. This paper gives the latest results obtained using a new 25 kV long pulse extraction power supply designed and built at RAL. Power supply performance, beam current and emittance are detailed.

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TUPRO090

Special Elettra Corrector Magnets

dipole, controls, vacuum, sextupole

1247

E. Karantzoulis, D. Castronovo, S. Krecic, G.L. Loda
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

To fully control the beam position source point for the dipole beam lines additional correctors are needed. The space available however is minimal and no alternative solution (e.g. additional coils on quadrupoles or sextupoles) is possible making the design of such a magnet very challenging. The design, installation and performance of those special magnets is presented and discussed.

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TUPME039

System Integration of the Demonstration Siemens Electrostatic Accelerator

high-voltage, ion-source, ion, experiment

1440

H. von Jagwitz-Biegnitz
JAI, Oxford, United Kingdom
P. Beasley, S. Goßmann-Levchuk, O. Heid
Siemens AG, Erlangen, Germany
D.C. Faircloth
STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
R.G. Selway
Inspired Engineering Ltd, Climping, United Kingdom

Siemens has proposed a novel compact DC electrostatic tandem accelerator to produce protons of a few MeV. Siemens is currently building a prototype of the accelerator at the Rutherford Appleton Laboratory. This paper reports on recent progress on the different components of the system as well as the commissioning of the whole machine.

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WEPRO011

Design Study of Pulsed Multipole Injection for Aichi SR

injection, multipole, storage-ring, electron

1962

N. Yamamoto, M. Hosaka, A. Mano, T. Takano, Y. Takashima
Nagoya University, Nagoya, Japan
M. Katoh
UVSOR, Okazaki, Japan

Since March of 2013 the user operation has been started with the top-up injection mode of the storage ring at Aich SR.The accelerators of Aichi SR consisted with a 50 MeV linac, an 1.2 GeV full energy booster and the storage ring. The　operation current of the storage ring is 300 mA and the injection rate is up to 1 Hz. The single bunch injection scheme is　employed and the electron beam can be injected into the arbitrary bucket of the storage ring. Up to now, the stabilitiy of 0.2 % for the stored beam current was achieved, however, the coherent oscillation of stored beams due to injection kikers is also obserbed. In order to introduce the new injection scheme into Aichi SR and to suppress that coherent oscillation, we have designed the pulsed multipole injection system. The system consists of the sextupole-like pulsed magnet and the micro-sec responce power supply. In the paper, we will report the results of beam tracking calculations with our designed magnet and power supply.

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WEPRO072

The Design of the Fast Raster System for the European Spallation Source

target, timing, controls, linac

2118

H.D. Thomsen, S.P. Møller
ISA, Aarhus, Denmark

The ESS will nominally operate with an average (peak) proton current of 2.5 mA (62.5 mA) at 2.0 GeV. To reduce the beam peak current density at the spallation target, the ESS HEBT will apply a fast transverse raster system consisting of 8 dithering magnet dipoles. The raster system sweeps the linac beamlet on the target surface and gives a rectangular intensity outline within a macropulse of 2.86 ms. The magnets are driven by triangular current waveforms of up to 40 kHz. The preliminary magnet design and power supply topology will be discussed.

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WEPME006

DESIGN AND CONSTRUCTION OF A 4 KW, 500 MHZ SOLID STATE RF AMPLIFIER AT IRANIAN LIGHT SOURCE FACILITY (ILSF)

network, insertion, storage-ring, booster

2264

A. Shahverdi, H. Ajam, H. Ghasem, Kh.S. Sarhadi
ILSF, Tehran, Iran

Solid state RF power amplifiers have been considered as an attractive candidate for providing the high power RF power required in increasing number of accelerator applications in recent years. Due to the advantages of these amplifiers and based on the successful experience done in other light sources; ILSF RF group has started R&D in design and fabrication of solid state amplifiers. Two modules based on two different LDMOS transistors have been developed successfully at 500MHz. The measured characteristics are presented and compared in this paper. Combining of 8 such modules is under test to achieve 4kW output power as the first stage of the conceptually designed combining network. This paper outlines the design concept of the different parts of the amplifiers and presents the experimental results obtained so far.

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WEPME020

Commissioning of the MICE RF System

operation, experiment, cavity, high-voltage

2297

A.J. Moss, A.E. Wheelhouse
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
S.M.H. Alsari
Imperial College of Science and Technology, Department of Physics, London, United Kingdom
A.J. Dick, K. Ronald, D.C. Speirs, C.G. Whyte
USTRAT/SUPA, Glasgow, United Kingdom
T. Stanley
STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
C.J. White
STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom

The Muon Ionisation Cooling Experiment (MICE) is being constructed at Rutherford Appleton Laboratory in the UK. The muon beam will be cooled using multiple hydrogen absorbers then reaccelerated using an RF cavity system operating at 201MHz. This paper describes recent progress in commissioning the amplifier systems at their design operation conditions, installation and operation within the Ionisation Cooling Test Facility (ICTF) as part of the MICE project.

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WEPME021

Solid-state Pulsed Klystron Transmitters

klystron, high-voltage, operation, flattop

2300

K. Schrock, C. Chipman, M.P.J. Gaudreau, B.E. Simpson
Diversified Technologies, Inc., Bedford, Massachusetts, USA

Funding: Lawrence Berkeley National Laboratory Daresbury Laboratory
Diversified Technologies, Inc. (DTI) is currently building and will deliver in early 2014 two solid-state pulsed klystron transmitters. Though not identical, the units are similar in design, and will be delivered to Lawrence Berkeley National Laboratory (LBNL) and Daresbury Laboratory in England. DTI’s goal across these two projects is to develop a complete package which can subsequently be marketed in the high peak power laboratory transmitter market. The modulator is a pulse transformer-coupled hybrid system, including ancillary klystron components (i.e., focus coil, socket) but not the actual klystron tube. Both systems employ a relatively simple modulator, consisting of an energy storage capacitor, a high voltage series switch, a step-up pulse transformer, and a passive pulse-flattening circuit. This arrangement gives an extremely flat pulse and allows the use of a moderate value of storage capacitor. The DTI switch can open or close as commanded, so the pulse width is adjusted by the gate pulse to the system.

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WEPME058

Development of Thin Films for Superconducting RF Cavities

SRF, superconductivity, scattering, lattice

2406

S. Wilde, B. Chesca
Loughborough University, Loughborough, Leicestershire, United Kingdom
A.N. Hannah, D.O. Malyshev, O.B. Malyshev, S.M. Pattalwar, R. Valizadeh
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
G.B.G. Stenning
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom

Superconducting coatings for superconducting radio frequency (SRF) cavities is an intensively developing field that should ultimately lead to acceleration gradients better than those obtained by bulk Nb RF cavities. ASTeC has built and developed experimental systems for superconducting thin-film deposition, surface analysis and measurement of Residual Resistivity Ratio (RRR). Nb thin-films were deposited by magnetron sputtering in DC or pulsed DC mode (100 to 350 kHz with 50% duty cycle) with powers ranging from 100 to 600 W at various temperatures ranging from room temperature to 800 °C on Si (100) substrates. The first results gave RRR in the range from 2 to 22 with a critical temperature Tc=~9.5 K. Scanning electron microscopy (SEM), x-ray diffraction (XRD), electron back scattering diffraction (EBSD) and DC SQUID magnetometry revealed significant correlations between the film structure, morphology and superconducting properties.

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THYB01

Status and Trends in Magnet Power Converter Technology for Accelerators

controls, synchrotron, booster, FPGA

2822

F. Long
IHEP, Beijing, People's Republic of China

Power converters (PC) is one of the key technologies for accelerators. During recent years with the development of power semiconductor devices, optimization of topologies, and improvement of manufacturing, the voltage and current ratings and power densities have greatly increased for PCs. Various PCs are required for various magnets in accelerators, but in principle the design for main topologies and the methodology for stabilizing the output are similar. Main topologies, digital control systems，and considerations for the future about the magnet PC are briefly discussed in this presentation.

Slides THYB01 [2.477 MB]

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THPRO111

Control System for BEPCII Linac Power Sub-system

controls, EPICS, operation, linac

3156

X. Wu, X.C. Kong, Q. Le, S. Sun, Y. Zou
IHEP, Beijing, People's Republic of China

Power subsystem has been upgraded for energy improvement of the BEPCII Linac. As a result, new control system was in need. This paper proposes the designing and implementation about the power-supply control system. There are 156 sets of power supply in the system, which is divided into 6 parts, according to function. The control system is intended to make operations more convenient and efficient in beam regulation, which provides functions to meet such situations, like single regulation; restore the beam configures from data files; one-button to switch the electronic polarity (E-/E+). What’s more, the software provides a method of slow-change to protect the power supplies, when value change is too steep. Compare to the old system, this new software is more maintainable and extensible. This software is based on Qt, the GUI library for C++, and connects to the control box through the EPICS (Experimental Physics and Industrial Control System). The whole 156 sets of power supply are controlled by control boxes, which is ARM+FPGA (CPLD)-Structure front-end IO. This control system has assembled in BEPCII LINAC in September, which plays an important part in the following working.

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THPRO121

Control Environment of Power Supply for TPS Booster Synchrotron

controls, booster, quadrupole, dipole

3174

P.C. Chiu, Y.-S. Cheng, K.T. Hsu, K.H. Hu, D. Lee, K.-B. Liu, B.S. Wang, C.Y. Wu
NSRRC, Hsinchu, Taiwan

The TPS is a latest generation of high brightness synchrotron light source and ready for commissioning. It consists of a 150 MeV electron linac, a booster synchrotron, a 3 GeV storage ring, and experimental beam lines. The booster is designed to ramp electron beams from 150 MeV to 3 GeV in 3 Hz. The TPS control environment is based on EPICS framework to support rich functionalities including power supply control, waveform management, vacuum interface, BPM, intensity monitoring support, operation supports, and so on. This report summarizes the efforts on control environment development for TPS booster synchrotron.

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THPRO122

Control System of the Taiwan Photon Source for Commissioning

controls, EPICS, interface, Ethernet

3177

Y.-S. Cheng, Y.-T. Chang, J. Chen, P.C. Chiu, K.T. Hsu, S.Y. Hsu, K.H. Hu, C.H. Huang, C.H. Kuo, D. Lee, C.Y. Liao, C.-J. Wang, C.Y. Wu
NSRRC, Hsinchu, Taiwan

Control system for the Taiwan Photon Source (TPS) project was implemented. The system is ready for commissioning of the accelerators. Final integration test is in proceeding. The EPICS was chosen as control system framework. The subsystems control interfaces include event based timing system, Ethernet based power supply control, corrector power supply control, PLC-based pulse magnet power supply control and machine protection system, insertion devices motion control system, various diagnostics, and etc. The standard hardware components had been installed and integrated, and the various IOCs (Input Output Controller) are implemented as various subsystems control platforms. Development and test of the high level and low level software systems are in proceeding. The efforts will be summarized at this report.

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THPME060

Malfunction, Cause and Recurrence Prevention Measures of J-PARC Slow Extraction

extraction, target, quadrupole, controls

3370

M. Tomizawa, T. Kimura, H. Nakagawa, K. Okamura
KEK, Ibaraki, Japan

The radiation leakage accident occurred at the J-PARC hadron experimental hall in May 2013 was triggered by a target damage due to an unanticipated short beam pulse from J-PARC main ring. An extremely short beam pulse was produced by a rapid current increase of the quadrupole (EQ) power supply system for a spill feedback. A simulation with the slow extraction process could explain such a short beam pulse generation. The cause of the malfunction has been identified by an intensive investigation of the EQ power supply system performed after the accident. We will show measures to prevent recurrence.

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THPME061

Present Status of J-PARC - after the Shutdown due to the Radioactive Material Leak Accident-

linac, operation, injection, target

3373

T. Koseki
KEK, Ibaraki, Japan
K. Hasegawa
JAEA/J-PARC, Tokai-mura, Japan

In J-PARC, a radioactive material leak accident occurred at the Hadron Experimental Facility on May 23, 2013. The accident was triggered by a malfunction of the slow extraction system of the Main Ring synchrotron. After seven-month long shutdown due to the accident, beam operation of the linac was restarted in December 2013. In this paper, the most recent status of the beam operation is presented.

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THPME064

Progress and Status of the J-PARC 3GeV RCS

injection, operation, linac, vacuum

3382

M. Kinsho
JAEA/J-PARC, Tokai-mura, Japan

Big issue for the J-PARC 3GeV RCS was displacement of main magnets caused by last big earthquake because this made beam loss more than 400 kW beam power. Since realignment of main magnet and other components was essential to realize higher beam power and stable operation, this work has been done last maintenance period. To minimize amount of realignment work, we decided that not all components moved to designed regular potions but also minimum components moved to the position which was secured design acceptance 486 π mm mrad. Almost all components which are main magnets, rf cavities, and extraction magnets had to be moved in the range of 10 mm for horizontal, 3 mm for vertical and 9 mm for longitudinal, respectively. It was not necessary for the components installed in injection straight line to move because displacement of these components was less than ± 0.2 mm. At same time 400 MeV injection upgrade work should be done. Beam commissioning is planned from the middle of January 2014. The progress and status of the RCS in J-PARC are presented.

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THPME200

Status of the Utility System Construction for the 3 GeV TPS Storage Ring

storage-ring, booster, controls, operation

3751

J.-C. Chang, W.S. Chan, C.S. Chen, J.-R. Chen, Y.-C. Chung, C.W. Hsu, K.C. Kuo, Y.-C. Lin, C.Y. Liu, Y.-H. Liu, Z.-D. Tsai, T.-S. Ueng
NSRRC, Hsinchu, Taiwan

The construction of the utility system for the 3.0 GeV Taiwan Photon Source (TPS) was started in the end of 2009. The utility building for the TPS ring had been completed in the end of 2013. The building use license had been approved in Sep. 2013. The whole construction engineering has been completed. The acceptance test is scheduled on July 2014. Total budget of this construction is about four million dollars. This utility system presented in this paper includes the cooling water, air conditioning, electrical power, and compressed air systems.

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THPRI027

Automated Conditioning System for Siemens Novel Electrostatic Accelerator

software, vacuum, interface, controls

3825

H. von Jagwitz-Biegnitz
JAI, Oxford, United Kingdom
P. Beasley, O. Heid, T. Kluge
Siemens AG, Erlangen, Germany
D.C. Faircloth
STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
R.G. Selway
Inspired Engineering Ltd, Climping, United Kingdom

Siemens has proposed a novel compact DC electrostatic tandem accelerator to produce protons of a few MeV and is currently commissioning a prototype at the Rutherford Appleton Laboratory. The geometry of the accelerator involves large surfaces which are exposed to high electric fields and therefore need long procedures for conditioning. An automated system for conditioning has been developed. It reacts quicker to breakdowns than a human operator could do, thus being more effective and also reduces the time spent by research staff on the conditioning.

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FRXAB01

Trends in RF Technology for Applications to Light Sources with Great Average Power

klystron, operation, rf-amplifier, high-voltage

4065

Ch. Wang
NSRRC, Hsinchu, Taiwan

RF systems are a major part of both the capital and operating costs of contemporary light sources and directly impact their capability, reliability and availability. The RF community has been discussing for many years the best choice of CW RF power source for light sources. In the domain of great average power, the choice is among a klystron, inductive-output tube, and solid-state RF amplifier. Here we review their current development and challenges and offer a perspective from a point of view of operating a light source with high reliability and availability.

Slides FRXAB01 [4.033 MB]

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