Tunnelling cooling by a normal--vacuum--superconductor junction |
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| Authors: | Zhang Xin and Zhang Dian-Lin |
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| Affiliation: | Department of Physics, Northwest University, Xi'an 710069, China; Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| 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. |
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| Keywords: | normal--vacuum--superconductor junction tunnelling refrigeration low temperature |
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