Experimental investigation of cooling capacity of 4K pulse tube cryocooler in magnetic fields

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

Hirayama, Takashi^1 ; Morie, Takaaki^1 ; Xu, Mingyao^2

Technology Research Center, Sumitomo Heavy Industries Ltd., 19 Natsushima-Cho, Yokosuka-City, Kanagawa

237-8555, Japan^1

Precision Equipment Group, Sumitomo Heavy Industries Ltd., 2-1-1 Yato-Cho, Nishitokyo-City, Tokyo

188-8585, Japan^2

关键词: Application systems;    Dilution refrigerator;    Experimental investigations;    High magnetic fields;    Measured temperatures;    Measuring systems;    Pulse tube cryocoolers;    Sumitomo heavy industries;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012035/pdf
DOI  :  10.1088/1757-899X/502/1/012035

来源: IOP

【 摘 要 】

4K pulse tube cryocoolers are used for various applications such as dilution refrigerators, NMR magnet systems and physical properties measuring systems, etc. In general, these application systems have high magnetic field source to apply magnetic field to cooling objects. Therefore, cryocoolers are inevitably exposed to the magnet field. In order to clarify the effect of the magnetic field on 4K pulse tube cryocoolers, we measured temperature behavior of Sumitomo Heavy Industries, Ltd.(SHI) 4K pulse tube cryocoolers, RP-082B2S, in magnetic fields up to 7.0 T. It is found that second stage temperature only increases slightly and the cooling capacity maintains in the specification of 0.9 W at 4.2 K up to 4.5 T. The experimental results are reported in this paper.