Abstract The possibility of cooling a system from liquid helium temperature, 4.2 K, using a tunnel junction refrigerator is analysed. Calculations show that the device can be used over a wide temperature range from 4 K down to well below 1 mK with necessary cooling power. However, several serious difficulties must be overcome before the method can be used in low temperature laboratories.
Received: 07 March 2007
Revised: 12 March 2007
Accepted manuscript online:
PACS:
07.20.Mc
(Cryogenics; refrigerators, low-temperature detectors, and other low-temperature equipment)
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