Nuclear Science and Techniques ›› 2019, Vol. 42 ›› Issue (2): 20201-020201.doi: 10.11889/j.0253-3219.2019.hjs.42.020201

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Development of RF superconducting cavity forward power coupler

Lubei LIU1,2,Chunlong LI1,Peiyan YU1,2,Fengfeng WANG2,Chenzhang YUAN1,Yuan HE1,Shenghu ZHANG1,Bin ZHANG1()   

  1. 1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2018-10-16 Revised:2019-01-21 Online:2019-02-10 Published:2019-02-19
  • Contact: Bin ZHANG E-mail:zhangb@impcas.ac.cn
  • About author:LIU Lubei, male, born in 1984, graduated from Changchun University of Science and Technology in 2017, master student, focusing on nuclear technology and applications|LIU Lubei, male, born in 1984, graduated from Changchun University of Science and Technology in 2017, master student, focusing on nuclear technology and applications|ZHANG Bin, E-mail:<email>zhangb@impcas.ac.cn</email>
  • Supported by:
    Supported by Strategic Priority Research Program of Chinese Academy of Sciences (No.XDA21010202)

Abstract: Background

The 25 MeV superconducting linac is a pre-research device of the China initiative accelerator driven system (CiADS), which includes a normal temperature front end, a superconducting acceleration section and a high-energy beam transmission line. The beam energy is 2.1 MeV at the normal-temperature front-end exit, and after the superconducting acceleration section, the proton beam is accelerated to 25 MeV. In this pre-exploration device, the superconducting cavity is the core accelerating component of the entire accelerator whilst the forward power coupler is an important part of it. So far, most of the design of forward power couplers in China adopt drawbar structure which has a simple structure and stable operation at low temperature (4 K), but the space utilization rate is low and not universal.

Purpose

This study aims to develop a new forward power coupler to replace the drawbar structure forward power couplers.

Methods

The characteristics of the multi-cavity type of 25 MeV superconducting linear accelerator was analyzed, a pulley-type forward power coupler structure with simple structure, and low temperature stability was designed and developed. The internal application of the project showed its high space utilization, suitability for various cavity types, and good universality.

Results

This type of forward power coupler has been used to test the cavities of 25 MeV superconducting linac. The test results show that the structure meets the engineering test requirements.

Conclusion

The pulley structure can be applied to different types of cavity.

Key words: CiADS, Superconducting cavity, Forward power coupler, Pulley structure, Universility

CLC Number: 

  • TL5