3He/4He dilution refrigerator with pulse-tube refrigerator precooling
β Scribed by Kurt Uhlig
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 155 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0011-2275
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π SIMILAR VOLUMES
A refrigerator capable of operating both in evaporation and dilution modes is described. The refrigerator provides preliminary cooling of investigated samples down to a starting temperature of about 0.3 K and permits the location of samples directly in the mixing chamber as well as their replacement
A ZHe/"He dilution refrigerator is described where a commercial two-stage Gifford-McMahon refrigerator (Leybold RGD 210) cools the dilution unit and the radiation shields of the cryostat. This work is a continuation of previously described experiments where a more powerful closed cycle refrigerator
A 3He/4He dilution refrigerator is described where the instreaming 3He is precooled and liquefied by a counterflow heat exchanger which makes use of the enthalpy of the cold 3He gas pumped out of the still, and by subsequent Joule-Thomson expansion. This condenser replaces the usual 4He condenser.