Mechanically operated thermal switches for use at ultralow temperatures

Pat R. Roach*, J. B. Ketterson, B. M. Abraham, Paul D. Roach, J. Monson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Some thermal switch designs are discussed in which a 4He actuated bellows is used to make or break mechanical contact between two sections containing metallic surfaces. Techniques are discussed which permit the switch sections to make thermal contact to liquid 3He by employing a large liquid-solid surface area. Designs are presented for a Pomeranchuk cell and an adiabatic demagnetization cell, which incorporate the bellows-actuated mechanical switch concept.

Original languageEnglish (US)
Pages (from-to)207-209
Number of pages3
JournalReview of Scientific Instruments
Issue number2
StatePublished - 1975

ASJC Scopus subject areas

  • Instrumentation


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