High efficient two-stage GM refrigerator with magnetic material in the liquid helium temperature region

T. Kuriyama, R. Hakamada, H. Nakagome, Y. Tokai, M. Sahashi, R. Li, O. Yoshida, K. Matsumoto, T. Hashimoto

Research output: Chapter in Book/Report/Conference proceedingChapter

45 Citations (Scopus)

Abstract

This paper describes experimental results obtained from a two-stage Gifford-McMahon (GM) refrigerator which uses a rare earth compound as a 2nd regenerator matrix instead of Pb (lead) matrix. The refrigeration capacity below 10 K for a conventional two-stage GM refrigerator is so small that the lowest temperature achieved is limited to the 8 K level. The purpose of this study is to improve the refrigeration performance in the temperature region below 10 K. The technical point is to use Er3Ni (Erbium-3 Nickel) as a 2nd stage regenerator matrix, because it has much larger volumetric specific heat than Pb below 15 K and has almost the same specific heat as Pb at higher temperature. The reciprocating speed was optimized to improve the refrigeration performance. Refrigeration capacity of 1 W at 6.59 K and no load temperature of 4.50 K were obtained from the Er3Ni regenerator. The refrigeration loss mechanism below 10 K is also discussed.

Original languageEnglish
Title of host publicationAdvances in Cryogenic Engineering
PublisherPubl by Plenum Publ Corp
Pages1261-1269
Number of pages9
Volume35
Editionpt B
ISBN (Print)0306435977
Publication statusPublished - 1990 Dec 1
EventProceedings of the 1989 Cryogenic Engineering Conference. Part 2 (of 2) - Los Angeles, CA, USA
Duration: 1989 Jul 241989 Jul 28

Other

OtherProceedings of the 1989 Cryogenic Engineering Conference. Part 2 (of 2)
CityLos Angeles, CA, USA
Period89/7/2489/7/28

ASJC Scopus subject areas

  • Engineering(all)

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