Design of a Test Cavity for 162.5 MHz FPC

CHEN Long; ZHANG Shenghu; LI Yongming; JIANG Tiancai; WANG Ruoxu; LI Chunlong; HUANG Shichun; TAN Teng; WU Andong; YANG Lei; PAN Feng; LIU Xinmeng

doi:10.11804/NuclPhysRev.35.02.154

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Article Navigation > Nuclear Physics Review > 2018 > 35(2): 154-158

CHEN Long, ZHANG Shenghu, LI Yongming, JIANG Tiancai, WANG Ruoxu, LI Chunlong, HUANG Shichun, TAN Teng, WU Andong, YANG Lei, PAN Feng, LIU Xinmeng. Design of a Test Cavity for 162.5 MHz FPC[J]. Nuclear Physics Review, 2018, 35(2): 154-158. doi: 10.11804/NuclPhysRev.35.02.154

Citation:

CHEN Long, ZHANG Shenghu, LI Yongming, JIANG Tiancai, WANG Ruoxu, LI Chunlong, HUANG Shichun, TAN Teng, WU Andong, YANG Lei, PAN Feng, LIU Xinmeng. Design of a Test Cavity for 162.5 MHz FPC[J]. Nuclear Physics Review, 2018, 35(2): 154-158. doi: 10.11804/NuclPhysRev.35.02.154

Design of a Test Cavity for 162.5 MHz FPC

doi: 10.11804/NuclPhysRev.35.02.154

1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: National Key Basic Research Program of China (973 Program) (2014CB845504); Youth Innovation Promotion Association, CAS (2017455)

Received Date: 2018-01-19
Rev Recd Date: 2018-03-09
Publish Date: 2018-06-20

Abstract

Fundamental power couplers (FPC) are crucial components for feeding RF power to the accelerating cavities. Before being installed on the accelerating cavity, a coupler must be tested and conditioned at room temperature to check its fabrication quality, to verify its design specifications, and improve its RF performance. This paper thoroughly introduced the design of a test stand for the 162.5 MHz coupler of ADS 25 MeV demo facility at IMP, CAS. In order to overcome the shortcomings of the original contacting test method, a noncontacting test scheme was proposed. A physical model was built for the the coupler test and the test cavity power transmission was analyzed theoretically. Based on the analysis results, a low-loss, wide-passband and multipurpose non-contacting coupler test cavity was designed. With the new test cavity, a power loss of around 60W and a -3 dB bandwidth of 15 MHz at a test power of 20 kW was achieved.
- coupler,
- test stand,
- room-temperature conditioning,
- test cavity

References

[1]	XU Hushan, HE Yuan, LUO P. AAPPS Bulletin, 2015, 25(3):30.
[2]	WEN Liangjian, ZHANG Shenghu, LI Yongming, et al. China Physics C, 2016, 40(2):027004.
[3]	PAN Weimin, HUANG Tongting, MA Qiang, et al. China Physics, 2012, 36(4):355.
[4]	KAZAKOV S, POLOUBOTKO V, HANNA B M, et al. Proceedings of LINAC 2014, Switzerland:2014:538.
[5]	PADAMSEE H. RF Superconductivity for Accelerator[M]. New York:Wiley, 1998:153.
[6]	PADAMSEE H. RF Superconditivity:Science, Technology, and Applications[M]. New York:Wiley, 2009:26.

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Design of a Test Cavity for 162.5 MHz FPC

doi: 10.11804/NuclPhysRev.35.02.154

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

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

Funds: National Key Basic Research Program of China (973 Program) (2014CB845504); Youth Innovation Promotion Association, CAS (2017455)

Received Date: 2018-01-19
Rev Recd Date: 2018-03-09
Publish Date: 2018-06-20

Key words:

Abstract: Fundamental power couplers (FPC) are crucial components for feeding RF power to the accelerating cavities. Before being installed on the accelerating cavity, a coupler must be tested and conditioned at room temperature to check its fabrication quality, to verify its design specifications, and improve its RF performance. This paper thoroughly introduced the design of a test stand for the 162.5 MHz coupler of ADS 25 MeV demo facility at IMP, CAS. In order to overcome the shortcomings of the original contacting test method, a noncontacting test scheme was proposed. A physical model was built for the the coupler test and the test cavity power transmission was analyzed theoretically. Based on the analysis results, a low-loss, wide-passband and multipurpose non-contacting coupler test cavity was designed. With the new test cavity, a power loss of around 60W and a -3 dB bandwidth of 15 MHz at a test power of 20 kW was achieved.

Citation:

CHEN Long, ZHANG Shenghu, LI Yongming, JIANG Tiancai, WANG Ruoxu, LI Chunlong, HUANG Shichun, TAN Teng, WU Andong, YANG Lei, PAN Feng, LIU Xinmeng. Design of a Test Cavity for 162.5 MHz FPC[J]. Nuclear Physics Review, 2018, 35(2): 154-158. doi: 10.11804/NuclPhysRev.35.02.154