A digital low-level radio-frequency system R＆D for a 1.3 GHz nine-cell cavity

To test and verify the performance of the digital low-level radio-frequency （LLRF） and tuner system designed by the IHEP RF group, an experimental platform with a retired KEK 1.3 GHz nine-cell cavity is set up. A radio-frequency （RF） field is established successfully in the cavity and the frequency...

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Published in中国物理C：英文版 Vol. 36; no. 3; pp. 261 - 266
Main Author 邱丰 高杰 林海英 刘熔 马新朋 沙鹏 孙毅 王光伟 王群要 徐波
Format Journal Article
LanguageEnglish
Published 2012
Subjects
低电平
国际直线对撞机
实验平台
射频系统
无线电频率
研发
频率锁定
高能物理
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ISSN1674-1137
0254-3052

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Summary:To test and verify the performance of the digital low-level radio-frequency （LLRF） and tuner system designed by the IHEP RF group, an experimental platform with a retired KEK 1.3 GHz nine-cell cavity is set up. A radio-frequency （RF） field is established successfully in the cavity and the frequency of the cavity is locked by the tuner in ±0.5°（about ±1.2 kHz） at room temperature. The digital LLRF system performs well in a five-hour experiment, and the results show that the system achieves field stability at amplitude 〈0.1% （peak to peak） and phase 〈0.1° （peak to peak）. This index satisfies the requirements of the International Linear Collider （ILC）, and this paper describes this closed-loop experiment of the LLRF system.
Bibliography:To test and verify the performance of the digital low-level radio-frequency （LLRF） and tuner system designed by the IHEP RF group, an experimental platform with a retired KEK 1.3 GHz nine-cell cavity is set up. A radio-frequency （RF） field is established successfully in the cavity and the frequency of the cavity is locked by the tuner in ±0.5°（about ±1.2 kHz） at room temperature. The digital LLRF system performs well in a five-hour experiment, and the results show that the system achieves field stability at amplitude 〈0.1% （peak to peak） and phase 〈0.1° （peak to peak）. This index satisfies the requirements of the International Linear Collider （ILC）, and this paper describes this closed-loop experiment of the LLRF system.
LLRF, tuner, 1.3 GHz, RF, ILC
11-5641/O4
QIU Feng GAO Jie LIN Hai-Ying LIU Rong MA Xin-Peng SHA Peng SUN Yi WANG Guang-Wei WANG Qun-Yao XU Bo （1 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China）
ISSN:1674-1137
0254-3052