Operation of a TES microcalorimeter cooled by a compact liquid-helium-free 3He-4He dilution refrigerator directly coupled to a Gifford-McMahon cooler

T. Umeno, K. Maehata, K. Ishibashi, Y. Kamioka, S. Yoshida, K. Takasaki, K. Tanaka

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A superconducting transition edge thermosensor (TES) microcalorimeter was irradiated with LX-ray photons emitted by an 241Am source maintained at an operating temperature of 120 mK using a compact liquid-helium-free 3He-4He dilution refrigerator directly coupled to a Gifford-McMahon (GM) cooler. The first and second stages of the GM cooler were directly coupled to the first and second pre-cool heat exchangers of a stick shaped dilution unit through copper plates in a vacuum chamber. The helium-free dilution refrigerator provided a cooling power of 20 μW at 100 mK. Detection signals of LX-ray photons emitted by the 241Am source were observed by operating the TES microcalorimeter in a severe noise environment induced by the mechanical vibrations of the GM cooler.

Original languageEnglish
Pages (from-to)314-319
Number of pages6
JournalCryogenics
Volume50
Issue number5
DOIs
Publication statusPublished - May 2010

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

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