In-situ Variable Small Gap for Measurement of Finite-size Scaling Near the Lambda Transition

The development of a small-gap capacitor, especially utilizable for studying finite-size effects near the 4He superfluid phase transition, is discussed. This device is designed to provide a range of known sample heights of small measure, commensurate with the ability to closely approach the superflu...

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Bibliographic Details
Published in:Journal of low temperature physics 2007-03, Vol.146 (5-6), p.499-510
Main Authors: Niemela, J J, Ihas, G G
Format: Article
Language:English
Subjects:
Boundary conditions
Capacitors
Fluids
Low temperature
Low temperature physics
Phase transitions
Size effects
Superfluidity
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Summary:The development of a small-gap capacitor, especially utilizable for studying finite-size effects near the 4He superfluid phase transition, is discussed. This device is designed to provide a range of known sample heights of small measure, commensurate with the ability to closely approach the superfluid transition, in which other variations in boundary conditions are avoided. In addition to the ability to adjust the gap of this capacitor at low temperature, parallelism can be maintained to a high degree.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-006-9280-y