Alumina shunt for precooling a cryogen-free 4He or 3He refrigerator

Uhlig, K.

doi:10.1016/j.cryogenics.2016.07.011

Cited by 1 publication

(2 citation statements)

References 9 publications

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“…Thermal links below the still stage were made by amorphous alumina shunts, which have been previously proved effective for cooling from room temperature to 50 K. [36] The test cooling of our CFDR verifies that they are able to facilitate cooling intermediate cold plate and mixing chamber stages down to 10 K while serving as sufficiently weak thermal links at millikelvin temperatures. Similar designs could be generalized to other facilities.…”

Section: Discussionmentioning

confidence: 63%

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Development of a cryogen-free dilution refrigerator

Fan²,

T.³

et al. 2022

Chinese Phys. B

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With thermal fluctuation strongly suppressed, low temperature environment is essential for studies of condensed matter physics and developments of quantum technologies. Ultra-low temperature below 20 mK has demonstrated its importance and significance in physical sciences and information techniques. Dilution refrigeration is by far the best feasible and reliable method to generate and keep lattice temperature in this range. With a potential shortage of helium supply, cryogen-free dilution refrigerator (CFDR), eliminating the necessity of regular helium refill, becomes the main facility for the purpose of creating ultralow temperature environments. Here we describe our successful construction of a CFDR which reached a base temperature of around 10.9 mK for continuous circulation and 8.6 mK for single-shot operation. We describe its operating mechanism and the designs of key components, especially some unique designs including heat switch and alumina thermal link. Possible improvements in the future are also discussed.

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Section: Discussionmentioning

confidence: 63%

“…Alumina shunts have been proved effective for cooling above 50 K in cryogen-free 4 He and 3 He refrigerators. [36] The diameter of the shunts is 5 mm and the length is 3 cm. Copper caps are attached to both ends of the rods by epoxy (Stycast 2850), serving as anchor connectors to stages.…”

Section: Heat Switchmentioning

confidence: 99%

Development of a cryogen-free dilution refrigerator

Fan²,

T.³

et al. 2022

Chinese Phys. B

View full text Add to dashboard Cite

show abstract

Alumina shunt for precooling a cryogen-free 4He or 3He refrigerator

Cited by 1 publication

References 9 publications

Development of a cryogen-free dilution refrigerator

Development of a cryogen-free dilution refrigerator

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