新型低beta超导腔调谐算法分析与测试

马腾飞; 薛鹏; Ken Fong; 王贤武; 黄贵荣; 高郑; 宫正; 朱正龙

doi:10.11804/NuclPhysRev.35.03.294

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新型低beta超导腔调谐算法分析与测试

马腾飞, 薛鹏, Ken Fong, 王贤武, 黄贵荣, 高郑, 宫正, 朱正龙

文章导航 > 原子核物理评论 > 2018 > 35(3): 294-301

马腾飞, 薛鹏, Ken Fong, 王贤武, 黄贵荣, 高郑, 宫正, 朱正龙. 新型低beta超导腔调谐算法分析与测试[J]. 原子核物理评论, 2018, 35(3): 294-301. doi: 10.11804/NuclPhysRev.35.03.294

引用本文:

MA Tengfei, XUE Peng, KEN Fong, WANG Xianwu, HUANG Guirong, GAO Zheng, GONG Zheng, ZHU Zhenglong. Analysis and Test of New Tuning Algorithm for Low Beta Superconducting Cavity[J]. Nuclear Physics Review, 2018, 35(3): 294-301. doi: 10.11804/NuclPhysRev.35.03.294

Citation:

MA Tengfei, XUE Peng, KEN Fong, WANG Xianwu, HUANG Guirong, GAO Zheng, GONG Zheng, ZHU Zhenglong. Analysis and Test of New Tuning Algorithm for Low Beta Superconducting Cavity[J]. Nuclear Physics Review, 2018, 35(3): 294-301. doi: 10.11804/NuclPhysRev.35.03.294

新型低beta超导腔调谐算法分析与测试

doi: 10.11804/NuclPhysRev.35.03.294

马腾飞^1,2,
薛鹏^1,3,
Ken Fong⁴,
王贤武¹,
黄贵荣¹,
高郑¹,
宫正^1,2,
朱正龙¹

1.
中国科学院近代物理研究所, 兰州 730000;
2.
中国科学院大学, 北京 100049;
3.
西北师范大学, 兰州 730070;
4.
TRIUMF:Canada's Particle Accelerator Center, Vancouver V6T2A3, British Columbia, Canada

基金项目: 国家自然科学基金资助项目（91026001）

详细信息

作者简介:
马腾飞(1991-),男,天津人,硕士研究生,从事加速器高频LLRF相关技术研究;E-mail:matengfei@impcas.ac.cn。

中图分类号: TP29

Analysis and Test of New Tuning Algorithm for Low Beta Superconducting Cavity

1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China;
3.
Northwest Normal University, Lanzhou 730070, China;
4.
TRIUMF:Canada's Particle Accelerator Center, Vancouver V6T2A3, British Columbia, Canada

Funds: National Natural Science Foundation of China (91026001)

摘要: 为了使腔体在复杂电磁环境下处于谐振状态，保持超导腔加速电压的幅度相位稳定，研发了一种应用于自激锁相模式的腔体新型调谐算法。利用正交电压Q值控制调谐器调谐，从而消除了输入和输出间的相位误差，给出了理论推导过程与该算法的可靠性分析。该算法已应用于中国科学院近代物理研究所ADS项目超导加速器中，简化了传统控制模式中的信号采样数量，提高了系统控制精度与抗干扰能力，使腔体克服了在调谐过程中由于功率上冲引起的氦压波动。保证了超导腔在工作状态下，频率稳定在162.5 MHz，频率误差小于17 Hz。

For the purposes of keeping the resonant cavity steady in a complex electromagnetic environment and maintaining stable amplitude and phase, a new tuning algorithm for superconducting RF cavity operated in self-excited phase-locked mode has been developed. The quadrature voltage was employed to control the tuner under the phase-locked condition, so as to eliminate phase measurement between the input and the output. This paper demonstrates the principle of this "Minimum Q" tuning algorithm and presents an analysis of the stability of the system. The algorithm is applied to the superconducting accelerator of the Institute of Modern Physics' ADS project. The "Minimum Q" tuning algorithmnot only simplifies the number of signal sampling but also improves the control accuracy and anti-interference ability of the system, while enables the cavity to overcome the helium pressure fluctuation which caused by power overshoot. It ensures that the frequency of the superconducting cavity is stable at 162.5 MHz, and the frequency error is less than 17 Hz.
- 超导腔 /
- 闭环自激 /
- 最小正交分量 /
- 调谐算法
Abstract: For the purposes of keeping the resonant cavity steady in a complex electromagnetic environment and maintaining stable amplitude and phase, a new tuning algorithm for superconducting RF cavity operated in self-excited phase-locked mode has been developed. The quadrature voltage was employed to control the tuner under the phase-locked condition, so as to eliminate phase measurement between the input and the output. This paper demonstrates the principle of this "Minimum Q" tuning algorithm and presents an analysis of the stability of the system. The algorithm is applied to the superconducting accelerator of the Institute of Modern Physics' ADS project. The "Minimum Q" tuning algorithmnot only simplifies the number of signal sampling but also improves the control accuracy and anti-interference ability of the system, while enables the cavity to overcome the helium pressure fluctuation which caused by power overshoot. It ensures that the frequency of the superconducting cavity is stable at 162.5 MHz, and the frequency error is less than 17 Hz.
- superconducting cavity /
- self-excited phase-locked /
- minimum Q /
- tuning algorithm

[1]	SU Guanyu, GU Hanyang, CHENG Xu. Atomic Energy Science and Technology, 2012, 46(2):186. (in Chinese) (苏冠宇, 顾汉洋, 程旭. 原子能科学技术, 2012, 46(2):186.)
[2]	YUE Weiming, HE Yuan, ZHANG Shenghu, et al. R&D OF IMP Superconducting HWR For China ADS. Proceedings of LINAC2012, Tel-Aviv, Israel, 2012.
[3]	YIN Chengke. Research on Algorithm of Digital Low Level RF System of Shanghai Synchrotron Radiation Facility[D]. Shanghai:SINAP, University of Chinese Academy of Sciences, 2008:82. (in Chinese) (尹成科. 上海光源数字化高频低电平系统算法研究[D]. 上海:中国科学院上海应用物理研究所, 2008:82)
[4]	CHANG Wei, HE Yuan, LI Chunlong, et al. Nuclear Physics Review, 2015, 31(2):152. (in Chinese) (常玮, 何源, 李春龙, 等. 原子核物理评论, 2014, 31(2):152.)
[5]	GENE F FRANKLIN, DAVID POWELL, ABBAS EMAMINAEINI. Feedback Control of Dynamic Systems[M]. 5th ed. Beijing:Post & Telecom Press, 2007:105.
[6]	KUO BENJAMIN C, FARID GOLNARAGHI. Automatic Control Systems[M]. 8th ed. Beijing:Higher Education Press, 2004:19.
[7]	KEN Fong. TRIUMF Document:TRI-DN-00-00-Resonance Control for Superconducting RF Cavity in Self-Excited Phase-Locked Mode Design Note. 2016:3.
[8]	HE Shoubo. Study of Mechanical Stability and Frequency Tuning for Low beta Superconducting Half-wave Resonator in High Intensity Proton Linac for China ADS[D]. Lanzhou:Institute of Modern Physics, Chinese Academy of Sciences, 2014:127. (in Chinese) (贺守波. ADS强流质子加速器低β超导HWR腔结构稳定性分析与调谐研究[D]. 兰州:中国科学院近代物理研究所, 2014:127.)
[9]	GAO Zheng. Experimental Study on Low Level Control Algorithm of Strong Current Superconducting accelerator[D]. Lanzhou:Institute of Modern Physics, Chinese Academy of Sciences, 2016:22. (in Chinese) (高郑. 强流超导加速器低电平控制算法实验研究[D]. 兰州:中国科学院近代物理研究所, 2016:22.)
[10]	ZHU Zhenglong, WANG Xianwu, LI Chunlong. Nuclear Physics Review, 2015, 32(2):196. (in Chinese) (朱正龙, 王贤武, 李春龙. 原子核物理评论, 2015, 32(2):196.)

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新型低beta超导腔调谐算法分析与测试

doi: 10.11804/NuclPhysRev.35.03.294

1. 中国科学院近代物理研究所, 兰州 730000;

2. 中国科学院大学, 北京 100049;

3. 西北师范大学, 兰州 730070;

4. TRIUMF:Canada's Particle Accelerator Center, Vancouver V6T2A3, British Columbia, Canada

基金项目: 国家自然科学基金资助项目（91026001）

作者简介:
马腾飞(1991-),男,天津人,硕士研究生,从事加速器高频LLRF相关技术研究;E-mail:matengfei@impcas.ac.cn。

收稿日期: 2018-03-30
修回日期: 2018-06-06
刊出日期: 2018-09-20

中图分类号: TP29

关键词:

超导腔 /

闭环自激 /

最小正交分量 /

调谐算法

摘要: 为了使腔体在复杂电磁环境下处于谐振状态，保持超导腔加速电压的幅度相位稳定，研发了一种应用于自激锁相模式的腔体新型调谐算法。利用正交电压Q值控制调谐器调谐，从而消除了输入和输出间的相位误差，给出了理论推导过程与该算法的可靠性分析。该算法已应用于中国科学院近代物理研究所ADS项目超导加速器中，简化了传统控制模式中的信号采样数量，提高了系统控制精度与抗干扰能力，使腔体克服了在调谐过程中由于功率上冲引起的氦压波动。保证了超导腔在工作状态下，频率稳定在162.5 MHz，频率误差小于17 Hz。

For the purposes of keeping the resonant cavity steady in a complex electromagnetic environment and maintaining stable amplitude and phase, a new tuning algorithm for superconducting RF cavity operated in self-excited phase-locked mode has been developed. The quadrature voltage was employed to control the tuner under the phase-locked condition, so as to eliminate phase measurement between the input and the output. This paper demonstrates the principle of this "Minimum Q" tuning algorithm and presents an analysis of the stability of the system. The algorithm is applied to the superconducting accelerator of the Institute of Modern Physics' ADS project. The "Minimum Q" tuning algorithmnot only simplifies the number of signal sampling but also improves the control accuracy and anti-interference ability of the system, while enables the cavity to overcome the helium pressure fluctuation which caused by power overshoot. It ensures that the frequency of the superconducting cavity is stable at 162.5 MHz, and the frequency error is less than 17 Hz.

English Abstract

Analysis and Test of New Tuning Algorithm for Low Beta Superconducting Cavity

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

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

3. Northwest Normal University, Lanzhou 730070, China;

4. TRIUMF:Canada's Particle Accelerator Center, Vancouver V6T2A3, British Columbia, Canada

Funds: National Natural Science Foundation of China (91026001)

Received Date: 2018-03-30
Rev Recd Date: 2018-06-06
Publish Date: 2018-09-20

Keywords:

Abstract: For the purposes of keeping the resonant cavity steady in a complex electromagnetic environment and maintaining stable amplitude and phase, a new tuning algorithm for superconducting RF cavity operated in self-excited phase-locked mode has been developed. The quadrature voltage was employed to control the tuner under the phase-locked condition, so as to eliminate phase measurement between the input and the output. This paper demonstrates the principle of this "Minimum Q" tuning algorithm and presents an analysis of the stability of the system. The algorithm is applied to the superconducting accelerator of the Institute of Modern Physics' ADS project. The "Minimum Q" tuning algorithmnot only simplifies the number of signal sampling but also improves the control accuracy and anti-interference ability of the system, while enables the cavity to overcome the helium pressure fluctuation which caused by power overshoot. It ensures that the frequency of the superconducting cavity is stable at 162.5 MHz, and the frequency error is less than 17 Hz.

引用本文:

Citation:

MA Tengfei, XUE Peng, KEN Fong, WANG Xianwu, HUANG Guirong, GAO Zheng, GONG Zheng, ZHU Zhenglong. Analysis and Test of New Tuning Algorithm for Low Beta Superconducting Cavity[J]. Nuclear Physics Review, 2018, 35(3): 294-301. doi: 10.11804/NuclPhysRev.35.03.294