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Improved 3He/4He refrigerator

✍ Scribed by G Dall'Oglio; W Fischer; L Martinis; L Pizzo

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
146 KB
Volume
33
Category
Article
ISSN
0011-2275

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✦ Synopsis

The characteristics and performance of an improved 3He/4He double stage refrigerator are presented. It is based on the same principle as the previous double stage refrigerator described in reference 1. A new geometry was used to overcome both the extra thermal input due to gas convection in the condensation lines and the long period required to precool at 4.2 K. The improved refrigerator reaches an operative temperature of =0.35 K without any external mechanical pumping. The refrigerator has been used to cool 3He bolometers.

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