Speakers
Mrs
Shuhua Wang
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
Mr
Yuefeng Liu
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
Description
The cryogenic permanent magnet undulator (CPMU) is one new-type undulator with advantages such as higher magnetic performance compared with conventional undulators at the same magnetic period and gap. Shanghai Institute of Applied Physics (SINAP) has been studying the related technologies and developing the CPMU, and apply the CPMUs for the future SSRF upgrade and the XFEL projects in China. A subcooled liquid nitrogen circulation system based on a conventional semi open-cycle cooling system is adopted to cool the CPMU. Flow chart of subcooled liquid nitrogen loop system and result of the on-line test are given in this paper. During operation, the subcooled liquid nitrogen supplying temperature is at the range between 77.2K and 78.5K, and pressure fluctuation is lower than ±1kPa, which can meet the operation requirements of CPMU.
Primary author
Mrs
Shuhua Wang
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
Co-authors
Mrs
Li Wang
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
Mr
Ming Li
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
Mr
Qiaogen Zhou
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
Mr
Yiyong Liu
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
Mr
Yuefeng Liu
(Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
