caa a22 4500 44536601X CHVBK 20180317142930.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10909-010-0272-6 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0272-6 Development of a 3He Refrigerator for Possible Experiments of Solid 4He on a Small Jet Plane [Elektronische Daten] [T. Takahashi, M. Suzuki, R. Nomura, Y. Okuda] The gravity on the Earth (g E) has not been taken seriously to mask the fundamental phenomena on quantum solids, though there are some important studies on the critical phenomena of superfluid 4He under microgravity. We are planning to investigate the effect of gravity on the equilibrium shape of solid 4He. Since we had a chance to do such an experiment on a small jet plane through the ground based program by JAXA, we got started to construct a cryostat which could cool down as low as 500mK and meet severe restrictions of experiments on a jet plane. The main part of the refrigerator was a usual 3He-evaporator pumped by a scroll pump. Asmall GM refrigerator was installed to provide 4K stage. 1K pot was also put in which was also pumped by another scroll pump to condense 3He gas and sample 4He. The cryostat was designed to have two optical windows to be able to observe solid 4He under microgravity. In the test flight for the refrigerator, the minimum temperature of 690mK was kept during the entire flight of two hours in which 7 to 8 times parabolic flight was performed. Each parabolic flight includes about 20seconds microgravity and 20seconds 1.5 to 2.0g E period before and after the microgravity. We did some preliminary experiments with bcc solid 4He under microgravity. The crystal remained stuck to the bottom of the sample cell even in the 20 seconds microgravity condition. Springer Science+Business Media, LLC, 2010 Cryogenics nationallicence Liquid-solid interfaces nationallicence Growth kinetics of 4He nationallicence Microgravity environments for crystal growth nationallicence Takahashi T. Department of Condensed Matter Physics, Tokyo Institute of Technology, O-okayama, Meguro-ku, 152-8551, Tokyo, Japan aut Suzuki M. Department of Condensed Matter Physics, Tokyo Institute of Technology, O-okayama, Meguro-ku, 152-8551, Tokyo, Japan aut Nomura R. Department of Condensed Matter Physics, Tokyo Institute of Technology, O-okayama, Meguro-ku, 152-8551, Tokyo, Japan aut Okuda Y. Department of Condensed Matter Physics, Tokyo Institute of Technology, O-okayama, Meguro-ku, 152-8551, Tokyo, Japan aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 733-739 0022-2291 162:5-6<733 2011 162 10909 https://doi.org/10.1007/s10909-010-0272-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0272-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Takahashi T. Department of Condensed Matter Physics, Tokyo Institute of Technology, O-okayama, Meguro-ku, 152-8551, Tokyo, Japan aut NATIONALLICENCE 700 1- Suzuki M. Department of Condensed Matter Physics, Tokyo Institute of Technology, O-okayama, Meguro-ku, 152-8551, Tokyo, Japan aut NATIONALLICENCE 700 1- Nomura R. Department of Condensed Matter Physics, Tokyo Institute of Technology, O-okayama, Meguro-ku, 152-8551, Tokyo, Japan aut NATIONALLICENCE 700 1- Okuda Y. Department of Condensed Matter Physics, Tokyo Institute of Technology, O-okayama, Meguro-ku, 152-8551, Tokyo, Japan aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 733-739 0022-2291 162:5-6<733 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer