15-20 October 2017
CERN
Europe/Zurich timezone

45 GHz Microwave Power Transmission and Coupling Scheme Study with Superconducting ECR Ion Source at IMP

17 Oct 2017, 10:10
20m
CERN

CERN

Centre international de Conférence Genève (CICG). http://www.cicg.ch/
Oral presentaion Applications and related technologies 4th Session

Speaker

Mr Junwei Guo (Institute of Modern Physics, Chinese Academy of Sciences)

Description

A versatile platform for basic researches LEAF or Low Energy Accelerator Facility has been launched at IMP. In order to meet the beam intensity requirements of highly charged heavy ions, a 45 GHz superconducting ECR ion source FECR (a Fourth generation ECR ion source) is under intense R&D at IMP. Therefore, we introduced a 45 GHz gyrotron system which is capable of providing output power up to 20 kW in both CW and pulse modes as a microwave power source for FECR. Other than the gyrotron oscillator, the microwave power transmission, coupling and ECR heating are critical issues for FECR. Since the wavelength of 45 GHz microwave is about 6.67 mm and the maximum power level is 20 kW, the quasi-optical transmission scheme is utilized for high power transmission. This scheme has already been widely utilized in fusion devices, while to accommodate with an ECRIS, the outcome yet remains to be evidenced. The design and technical details of transmission line and coupling system will be presented in this paper. After off-line tests of microwave transmission efficiency and mode purity, 45 GHz gyrotron microwave source will be commissioned with SECRAL II (a superconducting ECR ion source optimized for 28 GHz operation), and some preliminary results of ECR heating and intense beam production will be discussed in this paper.

Primary author

Mr Junwei Guo (Institute of Modern Physics, Chinese Academy of Sciences)

Co-authors

Dr Liangting Sun (Institute of Modern Physics, Chinese Academy of Sciences) Dr Xinjian Niu (University of Electronic Science and Technology of China) Mr Zhen Shen (Institute of Modern Physics, Chinese Academy of Sciences) Mrs Xuezhen Zhang (Institute of Modern Physics, Chinese Academy of Sciences) Mr Wenhui Zhang (Institute of Modern Physics, Chinese Academy of Sciences) Xing Fang (Institute of Modern Physics, Chinese Academy of Sciences) Dr Hongwei Zhao (Institute of Modern Physics, Chinese Academy of Sciences)

Presentation materials