Operational Characteristics of the 200-m Flexible Cryogenic Transfer System

Autor: F. Z. Hsiao, L. J. Chen, W. S. Chiou, M. C. Lin, C. H. Lo, H. H. Tsai, M. H. Chang, T. C. Yu, L. H. Chang, M. H. Tsai, T. F. Lin, T. T. Yang, Y. H. Lin, H. C. Li, M. S. Yeh, F. T. Chung, C. Wang
Rok vydání: 2013
Předmět:
Zdroj: Journal of Superconductivity and Novel Magnetism. 26:1479-1483
ISSN: 1557-1947
1557-1939
DOI: 10.1007/s10948-012-2035-x
Popis: 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 120 W is 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 four-tube 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.
Databáze: OpenAIRE
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