Test of LLRF Control System on Superconducting Cavity

ZHU Zhenglong; WANG Xianwu; LI Chunlong; CHANG Wei; ZHANG Shenghu; ZHANG Junhui; ZHANG Ruifeng; WEN Lianghua; GAO Zheng; CHEN Qi; YUE Weiming; SONG Yukun

doi:10.11804/NuclPhysRev.32.02.196

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Volume 32 Issue 2

Jun. 2015

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Article Navigation > Nuclear Physics Review > 2015 > 32(2): 196-201

ZHU Zhenglong, WANG Xianwu, LI Chunlong, CHANG Wei, ZHANG Shenghu, ZHANG Junhui, ZHANG Ruifeng, WEN Lianghua, GAO Zheng, CHEN Qi, YUE Weiming, SONG Yukun. Test of LLRF Control System on Superconducting Cavity[J]. Nuclear Physics Review, 2015, 32(2): 196-201. doi: 10.11804/NuclPhysRev.32.02.196

Citation:

ZHU Zhenglong, WANG Xianwu, LI Chunlong, CHANG Wei, ZHANG Shenghu, ZHANG Junhui, ZHANG Ruifeng, WEN Lianghua, GAO Zheng, CHEN Qi, YUE Weiming, SONG Yukun. Test of LLRF Control System on Superconducting Cavity[J]. Nuclear Physics Review, 2015, 32(2): 196-201. doi: 10.11804/NuclPhysRev.32.02.196

Test of LLRF Control System on Superconducting Cavity

doi: 10.11804/NuclPhysRev.32.02.196

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
University of Chinese Academy of Sciences, Beijing 100049, China;
Northwest Normal University,Lanzhou 730070, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2015-06-20

Abstract

The first generation Low-Level radio frequency(LLRF) control systemfor China ADS injector Ⅱis developed by IMP, CAS(Institute of Modern Physics, Chinese Academy of Sciences). This system is composed by superconducting cavity amplitude stability controller, phase stability controller and the cavity resonance frequency controller; the operation frequency is 162.5 MHz. This is an all-digital closed-loop feedback control
system which based on the IQ quadrature sampling demodulation technique. The performance of the system has been tested on the superconducting cavity, which is running in the temperature range of liquid helium and the Epk=25.1 MV/m (the peak electricon the surface of the superconducting cavity). The amplitude stability is less
than .4 ‰ and the phase stability is less than 0.3°. Superconducting cavity bandwidth is about 230 Hz. From the spectrum, the phase noise suppression can reach 70 dBm.
- Low-Level radio frequency,
- amplitude and phase,
- stability,
- control system,
- test
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Test of LLRF Control System on Superconducting Cavity

doi: 10.11804/NuclPhysRev.32.02.196

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

University of Chinese Academy of Sciences, Beijing 100049, China;

Northwest Normal University,Lanzhou 730070, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2015-06-20

Key words:

Abstract: The first generation Low-Level radio frequency(LLRF) control systemfor China ADS injector Ⅱis developed by IMP, CAS(Institute of Modern Physics, Chinese Academy of Sciences). This system is composed by superconducting cavity amplitude stability controller, phase stability controller and the cavity resonance frequency controller; the operation frequency is 162.5 MHz. This is an all-digital closed-loop feedback control
system which based on the IQ quadrature sampling demodulation technique. The performance of the system has been tested on the superconducting cavity, which is running in the temperature range of liquid helium and the Epk=25.1 MV/m (the peak electricon the surface of the superconducting cavity). The amplitude stability is less
than .4 ‰ and the phase stability is less than 0.3°. Superconducting cavity bandwidth is about 230 Hz. From the spectrum, the phase noise suppression can reach 70 dBm.

Citation:

ZHU Zhenglong, WANG Xianwu, LI Chunlong, CHANG Wei, ZHANG Shenghu, ZHANG Junhui, ZHANG Ruifeng, WEN Lianghua, GAO Zheng, CHEN Qi, YUE Weiming, SONG Yukun. Test of LLRF Control System on Superconducting Cavity[J]. Nuclear Physics Review, 2015, 32(2): 196-201. doi: 10.11804/NuclPhysRev.32.02.196