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arXiv · 1604.03903

Reducing current noise in cryogenic experiments by vacuum-insulated cables

E. Mykkänen·J. S. Lehtinen·A. Kemppinen·C. Krause·D. Drung·J. Nissilä·A. J. Manninen
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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/\sqrt{Hz} in the millihertz range are obtained.

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E. Mykkänen, J. S. Lehtinen, A. Kemppinen, C. Krause, D. Drung, J. Nissilä, A. J. Manninen. 2016-08-29. Reducing current noise in cryogenic experiments by vacuum-insulated cables. https://doi.org/10.1063/1.4963904

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