Experiment of Low Heat Loss Liquid Helium Transfer line for NSRRC Cryogenic System

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Chuang, P.S.^1 ; Tsai, H.H.^1 ; Chiang, H.W.^2 ; Hsiao, F.Z.^1 ; Liao, W.R.^1 ; Li, H.C.^1 ; Chiou, W.S.^1 ; Chang, S.H.^1 ; Lin, T.F.^1

National Synchrotron Radiation Research Centre, 101 Hsin-Ann Road, Hsinchu

30076, Taiwan^1

National Tsing Hua University, National Synchrotron Radiation Research Centre, 101 Hsin-Ann Road No. 101 Kuang-Fu Road, Hsinchu

30076, Taiwan^2

关键词: Cryogenic system;    Mechanical parts;    Photon sources;    Stable operation;    Structure stability;    Superconducting radio frequency;    Transfer lines;    X ray photons;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012072/pdf
DOI  :  10.1088/1757-899X/502/1/012072

来源: IOP

【 摘 要 】

X-ray photon sources are used in research. During the past decade, the technology of the X-ray photon source has grown rapidly. To fulfil demands for an X-ray photon source in Taiwan, the Taiwan Photon Source (TPS), an electron accelerator with the energy of 3 GeV has been constructed with high brilliance and flux. To let the Superconducting radio frequency (SRF) system and cryogenic undulators in TPS to be under stable operation, the cryogenic system is therefore very important. Refrigerant of the TPS cryogenic system is liquid helium, to maintain LHe in its state, temperature has to be maintained below 4.5 K; however to evaporate 1 gram of liquid helium, only 20 Joule is needed. Therefore, the Multi-Channel Line (MCL) has been developed to prevent liquid helium vaporizing. Several mechanical parts have been designed to reduce heat loss and strengthen structure stability. In this paper, assembly of the transfer line and experimental results are discussed.