Phase boundary detection for dilution refrigerators

Details Phase boundary detection for dilution refrigerators Phase boundary detection for dilution refrigerators

2004-09-27

arxiv.org/abs/physics/0409136v1

Review of Scientific Instruments -- September 2004 -- Volume 75, Issue 9, pp. 3071-3073

Physics

Instrumentation and Detectors

3 pages

Scientific paper

10.1063/1.1784568

We describe a device to conveniently measure the positions of the phase boundaries in a dilution refrigerator. We show how a simple modification of a standard capacitive level gauge (segmentation of one of the electrodes) permits a direct calibration of the capacitance versus phase boundary position. We compare this direct calibration with the indirect procedure that must be adopted for a conventional capacitive level gauge. The device facilitates the correct adjustment of the 3He/4He fraction in the dilution refrigerator.

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