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Design of the Large Dimension Cold Shield Cooled by G-M Cryocooler

Authors: Gong Jie, Yu Qianxu, Liu Min, Shan Weiwei


The design of methods of the 20 K large dimension cold shield used for infrared radiation demarcating in space environment simulation test were introduced in this paper. The cold shield were cooled by five G-M cryocoolers , and the dimension of the cold shield is the largest in our country.Cold shield installation and distribution and compensator for contraction on cooling were introduced detailedly. The temperature distribution and cool-down time of cold shield surface were also calculated and analysed in this paper. The design of cold shield resolves the difficulty of compensator for contraction on cooling successfully. Test results show that the actual technical performance indicators of cold shield met and exceeded the design requirements.

Keywords: Satellite, cold shield, G-M cryocooler´╝îinfrared radiometer demarcating, space environment simulation equipments

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