Journal of Radio Electronics. eISSN 1684-1719. 2026. ¹6
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2026.6.9
THERMAL RELAXATION
OF GAS-GAP THERMAL SWITCH
BASED ON 10 T CRYOMAGNET SYSTEM
K.A. Kolesov1,2, O.V. Belova3, S.S. Morkovin3, I.I. Musabirov4, A.V. Mashirov1,3
1Kotelnikov IRE RAS,
125009, Russia, Moscow, Mokhovaya str., 11, b. 72Chelyabinsk State University,
454001, Russia, Chelyabinsk, Br. Kashirinykh str., 1293Bauman Moscow State Technical University,
105005, Russia, Moscow, 2-nd Baumanskaya str., 54Institute for Metals Superplasticity Problems RAS,
450001, Russia, Ufa, Stepana Khalturina str., 39
The paper was received May 15, 2026.
Abstract. This article studies the operating parameters of a gas-gap thermal switch in a cryogenic magnetic refrigerator based on a superconducting magnet cryostat. Helium was used as the heat exchange gas and a magnetocaloric alloy disk made of GdNi2 and a copper cylinder served as heat exchange elements. The relaxation times of the gas-gap thermal switch elements were experimentally determined at temperatures of 24 K, 61 K, 75 K, and 80 K. It was shown that the relaxation times of the contact pair of a cryogenic mechanical thermal switch with an indium thermal interface and a cryogenic gas-gap thermal switch are virtually identical. The potential cooling capacity was determined and a refrigeration cycle for a single cascade of a cryogenic magnetic refrigerator with a gas-gap thermal switch was constructed.
Key words: gas-gap thermal switch, mechanical thermal switch, cryogenic magnetic refrigeration.
Financing: The study was supported by the Russian Science Foundation ¹ 25-19-20141, https://rscf.ru/project/25-19-20141/.
Corresponding author: Mashirov Alexey Victorovich, a.v.mashirov@mail.ru
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For citation:
Kolesov K.A., Belova O.V., Morkovin S.S., Musabirov I.I., Mashirov A.V. Gas-gap thermal switch for a cryogenic magnetic refrigerator based on GdNi2. // Journal of Radio Electronics. – 2026. – ¹ 6. https://doi.org/10.30898/1684-1719.2026.6.9 (In Russian)