QT n -(4) L At the low temperature end, T = 4.2 K and (5) and the parameters p, A, X, Cp are constant and over a short length near the end the temperature variation can be taken as linear, which means that d2T -0 dx 2 From (3), (4), and (5) LI2pX 1 QT-Cp QL By differentiating dQT LI2 pX 1 dQL Cp Q~
A 4He-3He refrigerator through which 4He is circulated
β Scribed by K.W. Taconis; N.H. Pennings; P. Das; R. De Bruyn Ouboter
- Publisher
- Elsevier Science
- Year
- 1971
- Weight
- 152 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0031-8914
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π SIMILAR VOLUMES
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 cond
The sensitivity increase in bolometers obtained by operating temperatures of 1 K (helium-4) and 0.3 K (helium-3), with respect to standard bolometers cooled at pumped 4He temperature, represents in infrared and submillimetric astronomy a remarkable step forward in applications both on large ground t
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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.