Development of a Small He II Cryostat with Optical Windows for a Micro-gravity Experiment

In order to study the film boiling phenomena in saturated superfluid helium (He IIs) under a microgravity environment, a very compact visualization system has been fabricated and tested at KEK. It consists of a cryostat, a vacuum pump, a high-speed video camera and electrical circuits for measuremen...

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Published inTEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) Vol. 45; no. 5; pp. 238 - 243
Main Authors KIMURA, Nobuhiro, TAKADA, Suguru, GOTOH, Syuhichi, KAWAMATA, Hiroshi, IIDA, Masahisa, MURAKAMI, Masahide, NAGAI, Hideaki, MAMIYA, Mikito
Format Journal Article
LanguageJapanese
Published CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN 2010
Subjects
compact visualization system
drop tower
film boiling
micro-gravity
superfluid helium
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Summary:In order to study the film boiling phenomena in saturated superfluid helium (He IIs) under a microgravity environment, a very compact visualization system has been fabricated and tested at KEK. It consists of a cryostat, a vacuum pump, a high-speed video camera and electrical circuits for measurement. The cryostat in the system is equipped with optical windows for the visualization of film boiling in He IIs. The system was tested to verify the thermal and safety performances under a microgravity environment using a 10 m-drop tower at the Hokkaido Center of the National Institute of Advanced Industrial Science and Technology (AIST). Successful system operation from 1.94 to 2.05 K under microgravity conditions below 1 × 10-3 g was confirmed. The design and test results are described in this technical note.
ISSN:0389-2441
1880-0408
DOI:10.2221/jcsj.45.238