Adiabatic Melting Experiment on Helium Mixtures: Status and Prospects

A. Sebedash*, S. Boldarev, T. Riekki, J. Tuoriniemi

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

We describe the improvements made to our earlier experiment, aiming to cool saturated helium mixtures at the melting pressure to ultra-low temperatures in the microkelvin regime. Cooling is produced by dissolving pure 3He in the superfluid state to pure 4He being released from the solid phase within the mixture of isotopes at the melting pressure. The limiting factor for the performance was considered to be the inevitable coupling of the liquid mixture with the surroundings at higher temperatures, such as through the filling line and the sintered surfaces needed for the pre-cooling phase. These issues could be largely eliminated by the new design of the experiment. Results of testing the new components at low temperatures are presented and discussed.

Original languageEnglish
Pages (from-to)588-595
Number of pages8
JournalJournal of Low Temperature Physics
Volume187
Issue number5-6
DOIs
Publication statusPublished - 1 Jun 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Dilution cooling
  • Helium mixtures
  • Solid helium
  • Superfluidity

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