Reducing current noise in cryogenic experiments by vacuum-insulated cables

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Abstract

We measure the current noise of several cryogenic cables in a pulse tube based dilution refrigerator at frequencies between about 1 mHz and 50 kHz. We show that vibration-induced noise can be efficiently suppressed by using vacuum-insulated cables between room temperature and the 2nd pulse tube stage. A noise peak below 4 fA at the 1.4 Hz operation frequency of the pulse tube and a white noise density of 0.44 fA / Hz in the millihertz range are obtained.
Original languageEnglish
Article number10511
JournalReview of Scientific Instruments
Volume87
Issue number10
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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