IPAC2014 - Classification: 07 Accelerator Technology Main Systems / T11 Power Supplies

Paper	Title	Page
MOPME051	Turbo Generators for Powering the HV-solenoids at the HESR Electron Cooler	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	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	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	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	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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MOPME059	Design of a Multi-harmonic Buncher for LINCE	508
	J. Labrador, C. Bonțoiu, J.A. Dueñas, I. Martel University of Huelva, Huelva, Spain M.A. Carrera, A. Garbayo AVS, Elgoibar, Spain A.C.C. Villari FRIB, East Lansing, Michigan, USA
	Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA. Continuous beams delivered by the LINCE ECR ion source will be bunched by a multi-harmonic buncher consisting of two copper-made electrodes. Its numerical design is reported here along with electric and magnetic field maps. Multi-frequency operation is proven by tracking a continuous beam and optimizing the its longitudinal phase space bunching for various ion species under the influence of space charge effects. A thermo-mechanical study carried out in order to estimate the needed water flow through the electrodes is presented as well.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME059
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MOPME061	Design of a Three Legs and Phase Shift AC to DC Converter for Taiwan Photon Light Source	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	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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THYB01	Status and Trends in Magnet Power Converter Technology for Accelerators	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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Paper

Title

Page

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

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

Export •

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

MOPME054

Upgrade of the Elettra Magnet Power Supply Controllers

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

Export •

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

MOPME055

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

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

Export •

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

MOPME057

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

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

Export •

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

MOPME058

The Magnet Power Supply for PAL-XFEL

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

Export •

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

MOPME059

Design of a Multi-harmonic Buncher for LINCE

508

J. Labrador, C. Bonțoiu, J.A. Dueñas, I. Martel
University of Huelva, Huelva, Spain
M.A. Carrera, A. Garbayo
AVS, Elgoibar, Spain
A.C.C. Villari
FRIB, East Lansing, Michigan, USA

Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA.
Continuous beams delivered by the LINCE ECR ion source will be bunched by a multi-harmonic buncher consisting of two copper-made electrodes. Its numerical design is reported here along with electric and magnetic field maps. Multi-frequency operation is proven by tracking a continuous beam and optimizing the its longitudinal phase space bunching for various ion species under the influence of space charge effects. A thermo-mechanical study carried out in order to estimate the needed water flow through the electrodes is presented as well.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME059

Export •

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

MOPME061

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

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

Export •

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

MOPME062

The Acceptance Measurement Platform for TPS Corrector Magnet Power Supplies

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

Export •

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

THYB01

Status and Trends in Magnet Power Converter Technology for Accelerators

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

Export •

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