Development of Compact Dry 3He-4He Dilution Refrigerator for Transition Edge Sensor Microcalorimeter X-ray Detector Operation on Electron Microscopes

Keisuke Maehata, Naoko Iyomoto, Y. Yamanaka, T. Ito, T. Hara, K. Mitsuda, N. Y. Yamasaki, K. Tanaka

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A compact dry 3He- 4He dilution refrigerator (DR) was developed for operation of a superconducting transition edge sensor (TES) microcalorimeter x-ray detector mounted on a transmission electron microscope. A Gifford-McMahon (GM)-type mechanical cryocooler was used as a DR pre-cooler to operate the TES microcalorimeter without consuming liquid helium. To reduce the noise and vibrations generated by the GM cryocooler, the DR was separated from the cryocooler in a split system that allows a remote helium cooling loop to pre-cool the DR. In the DR unit, the dilution components of the still, the heat exchangers, and the cascade pair of mixing chambers were assembled into a compact cylinder. A snout made from an oxygen-free copper rod was attached to the DR mixing chamber for placement of the TES microcalorimeter x-ray detector. The lowest temperature and the cooling power in the mixing chamber were measured to be 87 mK and 20 μW at 100 mK, respectively. The DR unit was shown to maintain the temperature on top of the snout such that it was below the temperature required for multi-pixel-array TES microcalorimeter x-ray detector operation.

Original languageEnglish
Pages (from-to)1161-1165
Number of pages5
JournalJournal of Superconductivity and Novel Magnetism
Volume28
Issue number3
DOIs
Publication statusPublished - Feb 25 2015

Fingerprint

Refrigerators
refrigerators
Dilution
calorimeters
dilution
Electron microscopes
electron microscopes
Detectors
X rays
sensors
detectors
Sensors
x ray detectors
x rays
Helium
chambers
Cooling
cooling
heat exchangers
coolers

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Development of Compact Dry 3He-4He Dilution Refrigerator for Transition Edge Sensor Microcalorimeter X-ray Detector Operation on Electron Microscopes. / Maehata, Keisuke; Iyomoto, Naoko; Yamanaka, Y.; Ito, T.; Hara, T.; Mitsuda, K.; Yamasaki, N. Y.; Tanaka, K.

In: Journal of Superconductivity and Novel Magnetism, Vol. 28, No. 3, 25.02.2015, p. 1161-1165.

Research output: Contribution to journalArticle

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