Outgassing characteristics analysis of mechanical cryocooler materials

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

Sawada, Kenichiro^1 ; Itahashi, Takamasa^2 ; Urabe, Tomoyuki^2 ; Sato, Yoichi^3 ; Shinozaki, Keisuke^3 ; Sugita, Hiroyuki^3 ; Kanao, Kenichi^4 ; Tsunematsu, Shoji^4 ; Otsuka, Kiyomi^4 ; Narasaki, Katsuhiro^4

JAXA Research Unit II, Research and Development Directorate, 3-1-1 Yoshinodai, Chuo-ku, Kanagawa Sagamihara, Japan^1

JAXA Space Technology Directorate i, 2-1-1 Sengen, Ibaraki Tsukuba, Japan^2

JAXA Research Unit II, Research and Development Directorate, 2-1-1 Sengen, Ibaraki Tsukuba, Japan^3

SHI Ehime Works 5-2 Soubiraki-cho, Niihama Ehime, Japan^4

关键词: Adsorption energies;    Atmospheric pressure ionization;    Constituent materials;    Cryocoolers;    Outgassing characteristics;    Outgassing rate;    Single stage;    Vacuum environment;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012043/pdf
DOI  :  10.1088/1757-899X/502/1/012043

来源: IOP

【 摘 要 】

Three types of outgassing rate measurements were conducted for the constituent materials of a single-stage Stirling (1ST) cooler: outgas measurement by total mass loss in a vacuum environment; outgassing rate measurement using the Quartz Crystal Microbalance (QCM) in a vacuum environment; and outgassing rate measurement using the Atmospheric Pressure Ionization Mass Spectrometer (API-MS) in an argon gas flowing environment. Relative comparisons of the adsorption energy and outgassing rate were made based on these measurement results. It was confirmed that the outgassing rate of the cold head polyimide part and compressor voice coil was dominant.