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Phase boundary detection for dilution refrigerators
2004
Review of Scientific Instruments
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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.
doi:10.1063/1.1784568
fatcat:kdzpjrel6bb25lbtjr7vuixkoe