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Reaching a temperature of 0.64 K in an He4 cryostat with a new geometry

✍ Scribed by J.M. Goldschvartz; W.P. van der Merwe; A. Kollen

Publisher: Elsevier Science
Year: 1975
Tongue: English
Weight: 149 KB
Volume: 15
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(75)90189-7

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✦ Synopsis

The old problem of reaching temperatures below 1 K with liquid helium II film traps and adsorption pumps has been tackled several times. 1,2,3,4,5 On the other hand, Staas and Severijns 6 have designed a sophisticated and elegant device using as a cooling method the interaction between the superfluid and the normal fluid flow through a capillary. Nevertheless, none reached temperatures below 0.7 K.

In this note we report the first reproducible results obtained with a new design of cryostat which includes an helium II film trap and a charcoal adsorption pump. In Fig. 1 a crosssection with the features of the new cryostat is shown.

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