Operational Characteristics of the 200-m Flexible Cryogenic Transfer System
Journal
Journal of Superconductivity and Novel Magnetism
Journal Volume
26
Journal Issue
5
Pages
1479-1483
Date Issued
2013
Author(s)
Lin, M. C.
Wang, C.
Chang, M. H.
Chung, F. T.
Yeh, M. S.
Lin, Y. H.
Chen, L. J.
Tsai, M. H.
Yang, T. T.
Yu, T. C.
Chang, L. H.
Hsiao, F. Z.
Tsai, H. H.
Chiou, W. S.
Li, H. C.
Lin, T. F.
Abstract
A proper cryogenic environment is essential for the operation of superconducting devices. A test area for the superconducting radio-frequency modules (SRF) has been established in the RF laboratory at National Synchrotron Radiation Research Center in Taiwan; these modules require much liquid helium during conditioning and performance tests; a cooling capacity of 120Wis expected for the acceptance test of the SRF module. The cryogenic environment of the test area is completed on transferring the liquid helium over a remarkable length of 205 m from the two cryogenic plants at Taiwan Light Source, with a valve box located at each end to control and to measure the cryogenic flow. Flexible cryogenic transfer lines of concentric fourtube type are chosen for both the supply of liquid helium and the return of cold helium gas. Functional examination of this long transfer system was first achieved with a 500- L Dewar in the radio-frequency laboratory; an SRF module was then installed in the test area for practical operation. The primary concern about the cryogenic transfer system is the heat loss; a measurement technique based on the principle of thermodynamics is developed and proposed herein. With the available sensors inside the valve boxes and the heaters inside the 500-L Dewar and the test SRF module, this technique has proved promissing from the measured results.
SDGs
Type
journal article