Speaker
Description
There are two 450W and one 890W helium cryogenic systems, which were installed at Taiwan light source (TLS) and Taiwan photon source (TPS), respectively. The TLS helium cryogenic system were used for one SRF cavity and five superconducting magnets. The TPS helium cryogenic system was used for two SRF cavities at the present stage. These three helium cryogenic system experienced the pressure degradation, which reduced the performance and increased liquid nitrogen consumption for the precooling over the past few years. We had try to set up the cryogenic adsorber to capture the impurities, but, making no difference for the pressure degradation to the system. The impurities comprised of not only gas but also moisture. It was found that the cryogenic adsorber was not efficiently for the moisture. This paper was aimed to study the phenomena of pressure degradation. The moisture removal system was also presented and discussed.
