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arXiv · 2002.00893

An In-Situ Movable Calibration Source for Cryogenic Particle Detectors

N. Mast·M. Fritts·D. Sincavage·P. Cushman·V. Mandic
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Abstract

A prototype device capable of moving a radioactive calibration source to multiple positions was operated at millikelvin temperatures using a modified commercial stepper motor. It was developed as an in-situ calibration strategy for cryogenic dark matter detectors. Data taken by scanning a calibration source across multiple radial positions of a prototype dark matter detector demonstrated its functionality. Construction, heat load, and operation of the device are discussed, as is the effect of the motor on the detector operation. A sample dataset taken over multiple positions of a SuperCDMS detector is presented as an example of the utility of such a device.

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N. Mast, M. Fritts, D. Sincavage, P. Cushman, V. Mandic. 2020-04-29. An In-Situ Movable Calibration Source for Cryogenic Particle Detectors. https://doi.org/10.1016/j.nima.2020.164070

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