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Proceedings of the Twelfth International Cryogenic Engineering Conference Southampton, UK, 12–15 July 1988 | 1988

DEVELOPMENT OF A 4 K GM/JT CRYOCOOLER

Yoon-Myung Kang; Katsumi Sakitani; Shoichi Taneya; Kazuo Miura

4 K Gifford-McMahon/Joule-Thomson cryocoolers, which have refrigeration capacity rating of 3.5 W at 4.3 K and efficiency relative to Carnot 4%, were developed. One prototype has operated for 20,000 hours without JT service and several other units for 10,000 hours each in the field. No JT blockage problems have been observed. Several types of interface were also developed for application, e.g., recondensing helium in the cryostat for MRI or single crystal growth, and cooling sensors or mixers for far-infrared wave measurements.


Archive | 1988

Very low temperature refrigerator

Katsumi Sakitani; Yoon M. Kang; Shinichiro Shinozaki; Shoichi Taneya; Kazuo Miura; Tadashi Ogura; Satoshi Noguchi


Archive | 2004

Rotary type expander and fluid machinery

Masakazu Okamoto; Michio Moriwaki; Eiji Kumakura; Tetsuya Okamoto; Katsumi Sakitani


Archive | 1988

Cryogenic refrigeration system for cooling a specimen

Kazuo Miura; Yoon M. Kang; Shoichi Taneya; Satoshi Noguchi; Katsumi Sakitani


Archive | 2003

Volume expander and fluid machine

Katsumi Sakitani; Michio Moriwaki; Masakazu Okamoto; Eiji Kumakura; Tetsuya Okamoto


Archive | 2004

Rotary expansion machine and fluid machinery

Masakazu Okamoto; Michio Moriwaki; Eiji Kumakura; Tetsuya Okamoto; Katsumi Sakitani


Archive | 1997

Rotary compressor and refrigerating apparatus

Katsumi Sakitani; Masanori Masuda; Takahiro Uematsu; Takekazu Obitani; Shigeharu Taira; Youichi Oonuma


Archive | 2005

Displacement type expander

Eiji Kumakura; Masakazu Okamoto; Tetsuya Okamoto; Katsumi Sakitani


Archive | 2005

Positive displacement expander

Eiji Kumakura; Masakazu Okamoto; Tetsuya Okamoto; Katsumi Sakitani


Archive | 2005

Fluid machine having reduced heat input to fluid

Tetsuya Okamoto; Eiji Kumakura; Masakazu Okamoto; Michio Moriwaki; Katsumi Sakitani

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