Reduction of the Effective Electron Temperature in a Cryogen-free Dilution Refrigerator Via Electronic Filtering and Vibration Dampening
Cryogen-free dilution refrigerators (dry fridges) have become an increasingly popular solution to researchers’ cryogenic measurement needs due to their user friendliness and long term use cost savings (4 He does not need to be replenished). However, commercially available dry fridges frequently have an effective electron temperatures much warmer than the base temperature of the mixing chamber of the dry fridge. This thesis documents efforts taken to reduce the electron temperature in a dry fridge and the direct probing of the electron temperature via Coulomb blockade thermometry in a 500 nm wide quantum dot.
Manfra, Purdue University.
Electrical engineering|Condensed matter physics|Nanotechnology
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