Improvement of a 1.5W-class 4K Gifford-McMahon cryocooler

Onishi, Atsushi; Li, Rui; Asami, Hiroshi; Satoh, Toshimi; Kanazawa, Yoshiaki

doi:10.1016/b978-008042688-4/50082-x

Cited by 3 publications

(1 citation statement)

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“…Recently, numerous studies have been performed to improve the cooling performance and operating stability of the G-M refrigerator. Performance has been improved by using new regenerator magnetic materials [1][2][3][4][5][6], the introduction of the new structure for the regenerator, displacer and cold head [7][8][9][10][11][12], optimizing the operating conditions [13][14] and so on.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations and improvements for the 10 K G-M refrigerator

Hao¹,

Ju²

2012

AIP Conference Proceedings

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With the wide application of high performance cryo-pumps, high and low temperature superconducting devices, MRI, infrared detectors and cryogenic electronics, the development of high efficient and reliable 10 K G-M refrigerator is of critical importance and awaited by cryogenic industries. In the past two years, systematic studies have been carried out, and detailed experimental tests indicated that the cooling performance of the 10 K G-M refrigerator was improved by adding two additional rectification meshes inside the low temperature regenerator and by optimizing the system charge pressure. Furthermore, a new labyrinth sealing displacer was proposed and fabricated to substitute the traditional piston-ring sealing displacer for improved operating stability and reliability of the 10 K G-M refrigerator. The detailed experimental results and improvements were summarized and their optimal cases were given in this paper.

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