Optimization procedure for the cooling of liquid3He by adiabatic demagnetization of praseodymium nickel
作者:
J. M. Parpia,
W. P. Kirk,
P. S. Kobiela,
T. L. Rhodes,
Z. Olejniczak,
G. N. Parker,
期刊:
Review of Scientific Instruments
(AIP Available online 1985)
卷期:
Volume 56,
issue 3
页码: 437-443
ISSN:0034-6748
年代: 1985
DOI:10.1063/1.1138319
出版商: AIP
数据来源: AIP
摘要:
The construction and performance of a single stage nuclear demagnetization apparatus utilizing 0.267 mole of praseodymium nickel material is described. An optimization procedure to minimize entropy production during the demagnetization of the hyperfine enhanced material has been developed which enabled the cryostat to cool a liquid‐3He sample to a temperature of 350 &mgr;K. The effects of measured heat leaks and inferred eddy‐current heating are accounted for satisfactorily in a model of this procedure.
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