Speaker
Gerard VERMEULEN
(Institut Neel (CNRS))
Description
Institut Néel - CNRS and Air Liquide are presently developing a Closed-Cycle Dilution Refrigerator for Space. Recent sub-system level tests have demonstrated the operation of the low temperature components : the mixing chamber can provide close to 1µW at 50mK, the Still (in which the phase separation between liquid and gas occurs) can confine the liquid against gravity, and 4He can be efficiently re-circulated by means of a superfluid fountain pump. Yet, one of the major components for the system is the 3He compressor to re-circulate the 3He pumped at still level. In the tests at sub-system level, this compressor would be a commercial pump not adapted for space use. JAXA and SHI have been developing 3He compressors for use in a JT cooler (the so-called "1K class cooler"). Through recent developments, the minimum inlet pressure could be lowered towards CCDR requirements. A common program between JAXA and CNES has been set up to issue a coupled test of the CCDR with the modified 3He compressor. We present both subsystems and recent results obtained when coupling these 2 subsystems. We discuss potential next steps.
Author
Gerard VERMEULEN
(Institut Neel (CNRS))
Co-authors
Mr
Hiroyuki Sugita
(JAXA (Japan Aerospace Exploration Agency))
Mr
Kazuhisa Mitsuda
(JAXA (Japan Aerospace Exploration Agency))
Mr
Keisuke Shinozaki
(JAXA (Japan Aerospace Exploration Agency))
Mr
Kenichiro Sawada
(JAXA (Japan Aerospace Exploration Agency))
Mr
Philippe Camus
(CNRS - Institut Néel)
Sebastien Triqueneaux
(CNRS)
Mr
Stéphane D'Escrivan
(CNES (Centre National D'Etudes Spatiales))
Mr
Sylvain Martin
(ALAT (Air Liquide Advanced Technologies))
Mr
Takao Nakagawa
(JAXA (Japan Aerospace Exploration Agency))
Mr
Yoichi Satoh
(JAXA (Japan Aerospace Exploration Agency))
