IPAC2016 - List of Keywords (FPGA)

Paper	Title	Other Keywords	Page
MOPMB032	A New Fault Recovery Mechanism for Superconducting Cavity Failure in C-ADS	cavity, hardware, space-charge, linac	158
	Z. Xue, J.P. Dai, C. Meng IHEP, Beijing, People's Republic of China
	For proton linear accelerators used in applications such as C-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. A fault-tolerant mechanism should be mandatorily imposed in order to maintain short recovery time, high uptime and extremely low frequency of beam loss. This paper proposes an innovative and challenging way for compensation and rematch of cavity failure using fast electronic devices and Field Programmable Gate Array (FPGA) instead of embedded computers to complete the computation of beam dynamics. Due to the high arithmetic-computing-speed, good portability and repeatability, it is possible to realize calculation and re-adjustment online. In order to achieve the goal of instantaneous compensation and rematch, an advanced hardware design methodology including high-level synthesis and an improved genetic algorithm will be used.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB032
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MOPMB045	Development of FPGA-based Bunch-by-Bunch Beam Current Monitor	storage-ring, feedback, injection, LabView	193
	Liu, C.S. Liu, Q. Luo, B.G. Sun, Z.R. Zhou USTC/NSRL, Hefei, Anhui, People's Republic of China
	Funding: Supported by the National Science Foundation of China 11575181, 11375178. And by the Fundamental Research Funds for the Central Universities WK2310000046, WK2310000056 Bunch-by-bunch (BxB) beam current measurement is an important method to study filling pattern of injection and beam instability threshold for multi-bunch operation storage ring, also, necessary equipment for top-up injection. A high-speed high-precision ADC and FPGA are used to construct the bunch-by-bunch beam current measurement system. FPGA reads data from ADC, and transfer the data to PC via USB. A LabVIEW program is running on PC to process the data, and communicates with other accelerator equipment with EPICS by CA Lab. Besides the bunch-by-bunch beam current measurement, the BxB longitudinal tune is measured by the system, and other potential bunch-by-bunch beam diagnostics study could be done in future, like bunch-by-bunch beam life etc., to improve the performance of the storage ring of Hefei light source.
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MOPMY011	LLRF System Performance during SC Cavity Conditioning at STF KEK	LLRF, cavity, controls, feedback	536
	S.B. Wibowo Sokendai, Ibaraki, Japan T. Matsumoto, S. Michizono, T. Miura, F. Qiu KEK, Ibaraki, Japan
	High Energy Accelerator Research Organization (KEK) is now developing a digital low-level radio frequency (LLRF) control system based on digital feedback control at superconducting RF test facility (STF). The goal is to achieve the amplitude and phase stability of the accelerating field in the superconducting accelerator. Testing and evaluation of the digital LLRF system were conducted during the cavity conditioning performed between October and December 2015 to determine the level of performance. To enable cavity signal monitoring, direct sampling system was constructed and evaluated.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMY011
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MOPMY023	High Power Test of the RF System for the KOMAC MEBT	LLRF, controls, DTL, proton	552
	S.G. Kim, Y.-S. Cho, H.S. Kim, H.-J. Kwon Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea Y.G. Song KAERI, Gyeongbuk, Republic of Korea
	Funding: This work has been supported through KOMAC (Korea Multi-purpose Accelerator Complex) operation fund of KAERI by MSIP (Ministry of Science, ICT and Future Planning) A 100 MeV proton linac of the Korea multi-purpose accelerator complex (KOMAC) has been operated for providing a proton beam to users. RF systems of two medium energy beam transports (MEBT) have been designed to improve a beam quality. An operating frequency of the MEBT RF system is 350 MHz, and the required RF power is 44 kW for MEBT-1 and 18 kW for MEBT-2. The RF duty is 9% (1.5 ms, 60 Hz), and an RF stability of ±1% in amplitude and ±1° in phase is required. The RF system includes a low-level RF (LLRF) control system, a solid state RF amplifier (SSPA) as a 60 kW SSPA for MEBT-1 and a 30 kW SSPA for MEBT-2, a coaxial circulator, and 3-1/8" coaxial line components. A RF power test to the MEBT has been performed with 4 kW SSPA before the full power operation. The configuration and high power test results of the MEBT RF system are presented in this paper.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMY023
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WEPOR010	Recent Upgrades to the CERN SPS Wideband Intra-bunch Transverse Feedback Processor	feedback, controls, timing, operation	2687
	J.E. Dusatko, J.D. Fox, C.H. Rivetta SLAC, Menlo Park, California, USA W. Höfle CERN, Geneva, Switzerland O. Turgut Stanford University, Stanford, California, USA
	In support of the CERN High Luminosity LHC (HL-LHC) upgrade program, a research and development effort has been underway to understand and develop feedback control techniques for mitigating transverse intra-bunch instabilities in the SPS driven by electron cloud and TMCI effects. These effects could be a limiting factor to overall machine performance. A result of this effort has been the development of a very wide band transverse feedback demonstration system. This system has been used for the last several years in machine development studies where we have demonstrated single-bunch stability control of low order intra-bunch modes. In continuation of these efforts, recent upgrades have been performed in all stages of the system, including the feedback processor itself. This paper discusses the upgrades specific to it, including the ability to process multiple proton bunches in the SPS; and also highlights future directions in the development effort.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR010
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WEPOR033	Progress in the Work on the Tuner Control System of the cERL at KEK	controls, LLRF, feedback, linac	2742
	F. Qiu, T. Matsumoto, S. Michizono, T. Miura KEK, Ibaraki, Japan S.B. Wibowo Sokendai, Ibaraki, Japan
	A compact energy recovery linac (cERL), which is a test machine for future 3 GeV ERL project, was constructed at KEK. Five superconducting (SC) cavities were installed in the injector and main linac of the cERL. The SC cavities in cERL are prone to detuning by disturbances such as microphonics. Therefore, a piezo-based tuner system was used to compensate for the detuning of the SC cavity in the cERL. We have proposed advanced control methods that aim at improving the performance of the cERL tuner systems. In this paper, we present the progress in our work on the cERL tuner systems. The preliminary results of the beam-commissioning are also presented.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR033
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WEPOR039	Development of 200 MHz Digital LLRF System for the 1 MeV/n RFQ at KOMAC	LLRF, controls, rfq, cavity	2758
	H.S. Jeong, T.S. Ahn, Y.-S. Cho, H.S. Kim, S.G. Kim, H.-J. Kwon Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea Y.G. Song KAERI, Daejon, Republic of Korea
	KOMAC (Korea Multi-purpose Accelerator Complex) has a plan to develop the multipurpose ion irradiation system. This system includes the ion source, LEBT, RFQ and MEBT systems to transport ion particles to the target. In particular, the RFQ (Radio Frequency Quadrupole) system should receive 200 MHz RF within 1% amplitude error stability. To supply stable 200 MHz RF signal to the RFQ cavity, the LLRF (Low-Level Radio Frequency) system should be controlled through a control system which implemented using commercial digital board. This 1 MeV/n RFQ LLRF system has a concept to minimize the number of the analog components for minimizing the control error. For this, the FPGA (Field Programmable Gate Array) in the digital board will control the frequency of the output sinusoidal signal. In addition, this LLRF system applied the direct sampling, Non-IQ sampling, direct RF generation and fast IQ set update rate algorithm. In this presentation, the FPGA control logics of the LLRF digital board will be introduced. Also, the LLRF PI control logic test using 200 MHz dummy cavity will be described.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR039
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WEPOR044	Fpga Implementation of a Control System for the LANSCE Accelerator	controls, feedback, cavity, LLRF	2771
	S. Kwon, L.J. Castellano, D.J. Knapp, J.T.M. Lyles, M.S. Prokop, D. Rees, A. Scheinker, P.A. Torrez LANL, Los Alamos, New Mexico, USA
	As part of the modernization of the Los Alamos Neutron Science Center (LANSCE), a digital low level RF (LLRF) system was designed. The LLRF control system was implemented in a Field Programmable Gate Array (FPGA) using embedded Experimental Physics and Industrial Control System (EPICS) Input Output Controller (IOC) under the Real-Time Executive for Multiprocessor Systems (RTEMS). Proportional-Integral (PI) feedback controller, static beam feedforward controller, and iterative learning controller are implemented on the FPGA. The closed loop system performance was tested with a 10mA peak current proton beam.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR044
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WEPOR060	MTCA.4-based Beam Line Stabilization Application	laser, detector, controls, optics	2808
	K.P. Przygoda TUL-DMCS, Łódź, Poland C. Gerth, H. Schlarb, B. Steffen DESY, Hamburg, Germany
	We want to summarize the beam line stabilization application with MTCA.4 electronics. Presented solution is based on the compact 2U MTCA.4 crate integrating sensor and actuator cards. The optical beam position sensor is based on quadrupole SI PIN photodiode connected to low cost AMC based FMC carrier equipped with ADC card. The optical beam position correction is done using picomotorized stages equipped with active piezo elements and high voltage RTM piezo driver. The data processing and digital feedback units are implemented using Spartan 6 FPGA. The control algorithm has been optimized for low latency and high precision computations. The control electronics performance has been tested using single beam line test stand consisted of commercial laser diode drivers, supported optics and motorized stages. The first results are demonstrated and future possible applications are briefly discussed.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR060
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THPMW007	The Design of a New State Space Digital Power Supply Prototype	feedback, controls, power-supply, hardware	3546
	K. Shu, J.X. Zhang IHEP, Beijing, People's Republic of China
	Based on system identification and DLQR methods, a self-adaptive power supply can be implemented by the new controller structure without any change in power main circuit. Now only some raw tests have been taken which show its stableness, but the State Space Digital Controlling may turned out to be with potential. It makes power supplies with different capability easy to interchange without any more effort on tuning their parameters according to their loads, and can be extended to accommodate MIMO systems.
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THPMW008	Study of Digital Quench Detection System Based on System-on-Chip Technology	embedded, controls, timing, software	3549
	J.X. Zhang, X.J. Bian, F.S. Chen, J. Cheng, F. Long IHEP, Beijing, People's Republic of China
	Quench detection system is a key component of the quench protection system for superconducting magnets. According to operating experience of the quench protec-tion system for BEPCII interaction region superconduct-ing magnets and study in depth on the development process of System-on-Chip, we are establishing a set of digital quench detection system with high integration density and favourable portability by integrating IP cores, custom modules and developing embedded soft-ware on one piece of FPGA chip (Cyclone V SX SoC). The main components of this system are: 1.Hard proces-sor system based-on ARM Cortex-A9 architecture inte-grated with embedded operating system (Linux).2.Floating point DSP based-on soft IP core.3.Function Module Portion designed for different functions such as communicating with front end ADC, timing control, etc. This paper introduces the research progress of the system. *D.F.Orris, S.Feher, M.J.Lamm, J.Nogiec, S.Sharonov, M.Tartaglia, J.Tompkins, et al.," A digital quench detection system for superconducting magnets", Proceedings of PAC'99, New York, 1999.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW008
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THPMW013	Development of PAL-XFEL Magnet Power Supply	interface, power-supply, operation, status	3564
	K.-H. Park, S.-H. Jeong, Y.-G. Jung, D.E. Kim, I.S. Ko, H.-G. Lee, S.B. Lee, B.G. Oh, H.S. Suh PAL, Pohang, Kyungbuk, Republic of Korea W.S. Choi POSTECH, Pohang, Kyungbuk, Republic of Korea
	All magnets and magnet power supplies (MPS) for PAL-XFEL had been installed at the site. The all MPSs had been tested with the magnets at the field. The total number of assembled MPSs was amounted to 688, which were grouped into nine categories by their power capacities in order to reduce the manufacturing cost and make maintenance easy. The general specifications for the MPS for the PAL- XFEL were summarized. The design configurations of the MPS were also explained to satisfy the given requirements such as the output current stability. The test results of performances of the MPSs for corrector magnets were described here.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW013
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THPOY018	Main Operation Improvements on Taiwan Light Source	operation, feedback, power-supply, controls	4125
	C.H. Kuo, H.H. Chen, H.C. Chen, K.T. Hsu, S.J. Huang, J.A. Li, C.Y. Liao, M.-C. Lin, Y.K. Lin, Y.-C. Liu NSRRC, Hsinchu, Taiwan
	With the beam energy of 1.5 GeV, the storage ring of Taiwan Light Source (TLS) in National Synchrotron Radiation Research Center (NSRRC) has provided research service to users for more than twenty years. It takes a lot of efforts to keep this accelerator reliable and to improve its stability. NSRRC has finished the construction and commissioning of the new 3-GeV accelerator Taiwan Photon Source (TPS) which will be opened to users with limited beam lines in 2016. On the other hand, TLS has 25 beamlines and still serves users very well as being benefited by its mature operation skills and continuous efforts on maintenance and system improvement. Main challenges and corresponding solutions on TLS operation in these recent years t are presented herein, together with the statistics on operation performance.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY018
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THPOY048	NSLS-II Active Interlock System and Post-Mortem Architecture	timing, status, operation, hardware	4214
	K. Ha, E.B. Blum, W.X. Cheng, J. Choi, Y. Hu, D. Padrazo, S. Seletskiy, O. Singh, R.M. Smith, J. Tagger, Y. Tian, G. Wang, T. Yang BNL, Upton, New York, USA
	The NSLS-II at Brookhaven National Laboratory (BNL) started the user beam service in early 2015, and is currently operating 13 of the insertion device (ID) and beamlines as well as constructing new beamlines. The fast machine protection consists of an active interlock system (AIS), beam position monitor (BPM), cell controller (CCs) and front-end (FE) systems. The AIS measures the electron beam envelop and the dumps the beam by turning off RF system, and then the diagnostic system provides the post-mortem data for an analysis of which system caused the beam dump and the machine status analysis. NSLS-II post-mortem system involves AIS, CCs, BPMs, radio frequency system (RFs), power supply systems (PSs) as well as the timing system. This paper describes the AIS architecture and PM performance for NSLS-II safe operations.
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Paper

Title

Other Keywords

Page

MOPMB032

A New Fault Recovery Mechanism for Superconducting Cavity Failure in C-ADS

cavity, hardware, space-charge, linac

158

Z. Xue, J.P. Dai, C. Meng
IHEP, Beijing, People's Republic of China

For proton linear accelerators used in applications such as C-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. A fault-tolerant mechanism should be mandatorily imposed in order to maintain short recovery time, high uptime and extremely low frequency of beam loss. This paper proposes an innovative and challenging way for compensation and rematch of cavity failure using fast electronic devices and Field Programmable Gate Array (FPGA) instead of embedded computers to complete the computation of beam dynamics. Due to the high arithmetic-computing-speed, good portability and repeatability, it is possible to realize calculation and re-adjustment online. In order to achieve the goal of instantaneous compensation and rematch, an advanced hardware design methodology including high-level synthesis and an improved genetic algorithm will be used.

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MOPMB045

Development of FPGA-based Bunch-by-Bunch Beam Current Monitor

storage-ring, feedback, injection, LabView

193

Liu, C.S. Liu, Q. Luo, B.G. Sun, Z.R. Zhou
USTC/NSRL, Hefei, Anhui, People's Republic of China

Funding: Supported by the National Science Foundation of China 11575181, 11375178. And by the Fundamental Research Funds for the Central Universities WK2310000046, WK2310000056
Bunch-by-bunch (BxB) beam current measurement is an important method to study filling pattern of injection and beam instability threshold for multi-bunch operation storage ring, also, necessary equipment for top-up injection. A high-speed high-precision ADC and FPGA are used to construct the bunch-by-bunch beam current measurement system. FPGA reads data from ADC, and transfer the data to PC via USB. A LabVIEW program is running on PC to process the data, and communicates with other accelerator equipment with EPICS by CA Lab. Besides the bunch-by-bunch beam current measurement, the BxB longitudinal tune is measured by the system, and other potential bunch-by-bunch beam diagnostics study could be done in future, like bunch-by-bunch beam life etc., to improve the performance of the storage ring of Hefei light source.

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MOPMY011

LLRF System Performance during SC Cavity Conditioning at STF KEK

LLRF, cavity, controls, feedback

536

S.B. Wibowo
Sokendai, Ibaraki, Japan
T. Matsumoto, S. Michizono, T. Miura, F. Qiu
KEK, Ibaraki, Japan

High Energy Accelerator Research Organization (KEK) is now developing a digital low-level radio frequency (LLRF) control system based on digital feedback control at superconducting RF test facility (STF). The goal is to achieve the amplitude and phase stability of the accelerating field in the superconducting accelerator. Testing and evaluation of the digital LLRF system were conducted during the cavity conditioning performed between October and December 2015 to determine the level of performance. To enable cavity signal monitoring, direct sampling system was constructed and evaluated.

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MOPMY023

High Power Test of the RF System for the KOMAC MEBT

LLRF, controls, DTL, proton

552

S.G. Kim, Y.-S. Cho, H.S. Kim, H.-J. Kwon
Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea
Y.G. Song
KAERI, Gyeongbuk, Republic of Korea

Funding: This work has been supported through KOMAC (Korea Multi-purpose Accelerator Complex) operation fund of KAERI by MSIP (Ministry of Science, ICT and Future Planning)
A 100 MeV proton linac of the Korea multi-purpose accelerator complex (KOMAC) has been operated for providing a proton beam to users. RF systems of two medium energy beam transports (MEBT) have been designed to improve a beam quality. An operating frequency of the MEBT RF system is 350 MHz, and the required RF power is 44 kW for MEBT-1 and 18 kW for MEBT-2. The RF duty is 9% (1.5 ms, 60 Hz), and an RF stability of ±1% in amplitude and ±1° in phase is required. The RF system includes a low-level RF (LLRF) control system, a solid state RF amplifier (SSPA) as a 60 kW SSPA for MEBT-1 and a 30 kW SSPA for MEBT-2, a coaxial circulator, and 3-1/8" coaxial line components. A RF power test to the MEBT has been performed with 4 kW SSPA before the full power operation. The configuration and high power test results of the MEBT RF system are presented in this paper.

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WEPOR010

Recent Upgrades to the CERN SPS Wideband Intra-bunch Transverse Feedback Processor

feedback, controls, timing, operation

2687

J.E. Dusatko, J.D. Fox, C.H. Rivetta
SLAC, Menlo Park, California, USA
W. Höfle
CERN, Geneva, Switzerland
O. Turgut
Stanford University, Stanford, California, USA

In support of the CERN High Luminosity LHC (HL-LHC) upgrade program, a research and development effort has been underway to understand and develop feedback control techniques for mitigating transverse intra-bunch instabilities in the SPS driven by electron cloud and TMCI effects. These effects could be a limiting factor to overall machine performance. A result of this effort has been the development of a very wide band transverse feedback demonstration system. This system has been used for the last several years in machine development studies where we have demonstrated single-bunch stability control of low order intra-bunch modes. In continuation of these efforts, recent upgrades have been performed in all stages of the system, including the feedback processor itself. This paper discusses the upgrades specific to it, including the ability to process multiple proton bunches in the SPS; and also highlights future directions in the development effort.

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WEPOR033

Progress in the Work on the Tuner Control System of the cERL at KEK

controls, LLRF, feedback, linac

2742

F. Qiu, T. Matsumoto, S. Michizono, T. Miura
KEK, Ibaraki, Japan
S.B. Wibowo
Sokendai, Ibaraki, Japan

A compact energy recovery linac (cERL), which is a test machine for future 3 GeV ERL project, was constructed at KEK. Five superconducting (SC) cavities were installed in the injector and main linac of the cERL. The SC cavities in cERL are prone to detuning by disturbances such as microphonics. Therefore, a piezo-based tuner system was used to compensate for the detuning of the SC cavity in the cERL. We have proposed advanced control methods that aim at improving the performance of the cERL tuner systems. In this paper, we present the progress in our work on the cERL tuner systems. The preliminary results of the beam-commissioning are also presented.

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WEPOR039

Development of 200 MHz Digital LLRF System for the 1 MeV/n RFQ at KOMAC

LLRF, controls, rfq, cavity

2758

H.S. Jeong, T.S. Ahn, Y.-S. Cho, H.S. Kim, S.G. Kim, H.-J. Kwon
Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea
Y.G. Song
KAERI, Daejon, Republic of Korea

KOMAC (Korea Multi-purpose Accelerator Complex) has a plan to develop the multipurpose ion irradiation system. This system includes the ion source, LEBT, RFQ and MEBT systems to transport ion particles to the target. In particular, the RFQ (Radio Frequency Quadrupole) system should receive 200 MHz RF within 1% amplitude error stability. To supply stable 200 MHz RF signal to the RFQ cavity, the LLRF (Low-Level Radio Frequency) system should be controlled through a control system which implemented using commercial digital board. This 1 MeV/n RFQ LLRF system has a concept to minimize the number of the analog components for minimizing the control error. For this, the FPGA (Field Programmable Gate Array) in the digital board will control the frequency of the output sinusoidal signal. In addition, this LLRF system applied the direct sampling, Non-IQ sampling, direct RF generation and fast IQ set update rate algorithm. In this presentation, the FPGA control logics of the LLRF digital board will be introduced. Also, the LLRF PI control logic test using 200 MHz dummy cavity will be described.

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WEPOR044

Fpga Implementation of a Control System for the LANSCE Accelerator

controls, feedback, cavity, LLRF

2771

S. Kwon, L.J. Castellano, D.J. Knapp, J.T.M. Lyles, M.S. Prokop, D. Rees, A. Scheinker, P.A. Torrez
LANL, Los Alamos, New Mexico, USA

As part of the modernization of the Los Alamos Neutron Science Center (LANSCE), a digital low level RF (LLRF) system was designed. The LLRF control system was implemented in a Field Programmable Gate Array (FPGA) using embedded Experimental Physics and Industrial Control System (EPICS) Input Output Controller (IOC) under the Real-Time Executive for Multiprocessor Systems (RTEMS). Proportional-Integral (PI) feedback controller, static beam feedforward controller, and iterative learning controller are implemented on the FPGA. The closed loop system performance was tested with a 10mA peak current proton beam.

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WEPOR060

MTCA.4-based Beam Line Stabilization Application

laser, detector, controls, optics

2808

K.P. Przygoda
TUL-DMCS, Łódź, Poland
C. Gerth, H. Schlarb, B. Steffen
DESY, Hamburg, Germany

We want to summarize the beam line stabilization application with MTCA.4 electronics. Presented solution is based on the compact 2U MTCA.4 crate integrating sensor and actuator cards. The optical beam position sensor is based on quadrupole SI PIN photodiode connected to low cost AMC based FMC carrier equipped with ADC card. The optical beam position correction is done using picomotorized stages equipped with active piezo elements and high voltage RTM piezo driver. The data processing and digital feedback units are implemented using Spartan 6 FPGA. The control algorithm has been optimized for low latency and high precision computations. The control electronics performance has been tested using single beam line test stand consisted of commercial laser diode drivers, supported optics and motorized stages. The first results are demonstrated and future possible applications are briefly discussed.

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THPMW007

The Design of a New State Space Digital Power Supply Prototype

feedback, controls, power-supply, hardware

3546

K. Shu, J.X. Zhang
IHEP, Beijing, People's Republic of China

Based on system identification and DLQR methods, a self-adaptive power supply can be implemented by the new controller structure without any change in power main circuit. Now only some raw tests have been taken which show its stableness, but the State Space Digital Controlling may turned out to be with potential. It makes power supplies with different capability easy to interchange without any more effort on tuning their parameters according to their loads, and can be extended to accommodate MIMO systems.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW007

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THPMW008

Study of Digital Quench Detection System Based on System-on-Chip Technology

embedded, controls, timing, software

3549

J.X. Zhang, X.J. Bian, F.S. Chen, J. Cheng, F. Long
IHEP, Beijing, People's Republic of China

Quench detection system is a key component of the quench protection system for superconducting magnets. According to operating experience of the quench protec-tion system for BEPCII interaction region superconduct-ing magnets and study in depth on the development process of System-on-Chip, we are establishing a set of digital quench detection system with high integration density and favourable portability by integrating IP cores, custom modules and developing embedded soft-ware on one piece of FPGA chip (Cyclone V SX SoC). The main components of this system are: 1.Hard proces-sor system based-on ARM Cortex-A9 architecture inte-grated with embedded operating system (Linux).2.Floating point DSP based-on soft IP core.3.Function Module Portion designed for different functions such as communicating with front end ADC, timing control, etc. This paper introduces the research progress of the system.
*D.F.Orris, S.Feher, M.J.Lamm, J.Nogiec, S.Sharonov, M.Tartaglia, J.Tompkins, et al.," A digital quench detection system for superconducting magnets", Proceedings of PAC'99, New York, 1999.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW008

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THPMW013

Development of PAL-XFEL Magnet Power Supply

interface, power-supply, operation, status

3564

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

All magnets and magnet power supplies (MPS) for PAL-XFEL had been installed at the site. The all MPSs had been tested with the magnets at the field. The total number of assembled MPSs was amounted to 688, which were grouped into nine categories by their power capacities in order to reduce the manufacturing cost and make maintenance easy. The general specifications for the MPS for the PAL- XFEL were summarized. The design configurations of the MPS were also explained to satisfy the given requirements such as the output current stability. The test results of performances of the MPSs for corrector magnets were described here.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW013

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THPOY018

Main Operation Improvements on Taiwan Light Source

operation, feedback, power-supply, controls

4125

C.H. Kuo, H.H. Chen, H.C. Chen, K.T. Hsu, S.J. Huang, J.A. Li, C.Y. Liao, M.-C. Lin, Y.K. Lin, Y.-C. Liu
NSRRC, Hsinchu, Taiwan

With the beam energy of 1.5 GeV, the storage ring of Taiwan Light Source (TLS) in National Synchrotron Radiation Research Center (NSRRC) has provided research service to users for more than twenty years. It takes a lot of efforts to keep this accelerator reliable and to improve its stability. NSRRC has finished the construction and commissioning of the new 3-GeV accelerator Taiwan Photon Source (TPS) which will be opened to users with limited beam lines in 2016. On the other hand, TLS has 25 beamlines and still serves users very well as being benefited by its mature operation skills and continuous efforts on maintenance and system improvement. Main challenges and corresponding solutions on TLS operation in these recent years t are presented herein, together with the statistics on operation performance.

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THPOY048

NSLS-II Active Interlock System and Post-Mortem Architecture

timing, status, operation, hardware

4214

K. Ha, E.B. Blum, W.X. Cheng, J. Choi, Y. Hu, D. Padrazo, S. Seletskiy, O. Singh, R.M. Smith, J. Tagger, Y. Tian, G. Wang, T. Yang
BNL, Upton, New York, USA

The NSLS-II at Brookhaven National Laboratory (BNL) started the user beam service in early 2015, and is currently operating 13 of the insertion device (ID) and beamlines as well as constructing new beamlines. The fast machine protection consists of an active interlock system (AIS), beam position monitor (BPM), cell controller (CCs) and front-end (FE) systems. The AIS measures the electron beam envelop and the dumps the beam by turning off RF system, and then the diagnostic system provides the post-mortem data for an analysis of which system caused the beam dump and the machine status analysis. NSLS-II post-mortem system involves AIS, CCs, BPMs, radio frequency system (RFs), power supply systems (PSs) as well as the timing system. This paper describes the AIS architecture and PM performance for NSLS-II safe operations.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY048

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