Design of a low level radio frequency control system for the direct current-superconductive photocathode injector at Peking University

ZHANG He; WANG Fang; ZHANG Bao-Cheng; LIN Lin; HAO Jian-Kui; LIU Ke-Xin

doi:10.1088/1674-1137/35/10/013

Chinese Physics C> 2011, Vol. 35> Issue(10) : 955-958 DOI: 10.1088/1674-1137/35/10/013

Design of a low level radio frequency control system for the direct current-superconductive photocathode injector at Peking University

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A digital low level radio frequency (LLRF) control system based on a high precision field-programmable gate array (FPGA) is being developed for the stable operation of the upgraded direct current-superconductive (DC-SC) photocathode injector at Peking University. The design of this LLRF control system is described, including both the hardware and the internal algorithm. Analysis of disturbances shows that the system can achieve the requirement of ±0.1% for amplitude stability and ±0.1° for phase stability. Through experiments, preliminary results are presented in the paper.

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ZHANG He, WANG Fang, ZHANG Bao-Cheng, LIN Lin, HAO Jian-Kui and LIU Ke-Xin. Design of a low level radio frequency control system for the direct current-superconductive photocathode injector at Peking University[J]. Chinese Physics C, 2011, 35(10): 955-958. doi: 10.1088/1674-1137/35/10/013

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Received: 2010-10-14
Revised: 2011-05-20

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沈阳化工大学材料科学与工程学院沈阳 110142

Design of a low level radio frequency control system for the direct current-superconductive photocathode injector at Peking University

Received Date: 2010-10-14
Accepted Date: 2011-05-20
Available Online: 2011-10-05

Abstract: A digital low level radio frequency (LLRF) control system based on a high precision field-programmable gate array (FPGA) is being developed for the stable operation of the upgraded direct current-superconductive (DC-SC) photocathode injector at Peking University. The design of this LLRF control system is described, including both the hardware and the internal algorithm. Analysis of disturbances shows that the system can achieve the requirement of ±0.1% for amplitude stability and ±0.1° for phase stability. Through experiments, preliminary results are presented in the paper.