IPAC2016 - List of Authors (Zhou, Z.R.)

Paper	Title	Page
MOPMB040	Design of the Beam Diagnostics System for a New IR-FEL Facility at NSRL	181
	J.H. Wei, X.Y. Liu, P. Lu, B.G. Sun, L.L. Tang, F.F. Wu, Y.L. Yang, T.Y. Zhou, Z.R. Zhou USTC/NSRL, Hefei, Anhui, People's Republic of China
	Funding: Work supported by National Natural Science Foundation of China (21327901, 11105141, 11575181) A new IR-FEL has been commissioned at NSRL. This facility provides a final electron energy from 20 to 70 MeV, beam bunch with a macro-pulse length of 5~10 μs and a general micro-pulse repetition rate of 238 MHz, pulsed radiation with up to 100 mJ at about 0.3%~3% FWHM bandwidth. So a diagnostics system is necessary to monitor the performance of the bunch and the character of the FEL radiation, such as the beam position and profile, emittance, energy spread, laser intensity, etc. The beam diagnostics system mainly consists of Flags, a diagnostics beam line, BPMs, pop-in monitors and a FEL monitor system. This paper introduces the construction of this diagnostics system. Corresponding author: ylyang@ustc.edu.cn
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB040
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MOPMB045	Development of FPGA-based Bunch-by-Bunch Beam Current Monitor	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.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB045
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THPOW013	ARM-Based Controller of Power Supply for Focus Solenoid of Klystron	3957
	Z.R. Zhou, F.L. Shang, L. Shang USTC/NSRL, Hefei, Anhui, People's Republic of China
	Funding: Supported by the National Science Foundation of China 11175181 By the Fundamental Research Funds for the Central Universities WK2310000056 Klystrons are widely used in accelerators to provide powerful microwave power to the accelerating structure of linac to accelerate particles. The stability of a klystron is affected by the beam quality of high voltage gun of the klystron. The focus solenoid is needed to provide focus magnetic field around the klystron. ARM-based high performance of current stability power supply is designed to improve the quality of focus magnetic field of klystron, with a two-loop-hybrid design, which could achieve fast dynamic response and high static stability performance, instead of analogue power supply design. The bench test of the ARM-based controlled is done and the commissioning of the controller needs be done in future study.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW013
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Paper

Title

Page

Design of the Beam Diagnostics System for a New IR-FEL Facility at NSRL

181

J.H. Wei, X.Y. Liu, P. Lu, B.G. Sun, L.L. Tang, F.F. Wu, Y.L. Yang, T.Y. Zhou, Z.R. Zhou
USTC/NSRL, Hefei, Anhui, People's Republic of China

Funding: Work supported by National Natural Science Foundation of China (21327901, 11105141, 11575181)
A new IR-FEL has been commissioned at NSRL. This facility provides a final electron energy from 20 to 70 MeV, beam bunch with a macro-pulse length of 5~10 μs and a general micro-pulse repetition rate of 238 MHz, pulsed radiation with up to 100 mJ at about 0.3%~3% FWHM bandwidth. So a diagnostics system is necessary to monitor the performance of the bunch and the character of the FEL radiation, such as the beam position and profile, emittance, energy spread, laser intensity, etc. The beam diagnostics system mainly consists of Flags, a diagnostics beam line, BPMs, pop-in monitors and a FEL monitor system. This paper introduces the construction of this diagnostics system.
Corresponding author: ylyang@ustc.edu.cn

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB040

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MOPMB045

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

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.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB045

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THPOW013

ARM-Based Controller of Power Supply for Focus Solenoid of Klystron

3957

Z.R. Zhou, F.L. Shang, L. Shang
USTC/NSRL, Hefei, Anhui, People's Republic of China

Funding: Supported by the National Science Foundation of China 11175181 By the Fundamental Research Funds for the Central Universities WK2310000056
Klystrons are widely used in accelerators to provide powerful microwave power to the accelerating structure of linac to accelerate particles. The stability of a klystron is affected by the beam quality of high voltage gun of the klystron. The focus solenoid is needed to provide focus magnetic field around the klystron. ARM-based high performance of current stability power supply is designed to improve the quality of focus magnetic field of klystron, with a two-loop-hybrid design, which could achieve fast dynamic response and high static stability performance, instead of analogue power supply design. The bench test of the ARM-based controlled is done and the commissioning of the controller needs be done in future study.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW013

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