Title

Using SQUIDs to Detect Charge in Cryogenic Germanium Detectors

Document Type

Article

Publication Date

2-23-2012

Publisher

Springer

Abstract

This paper describes an impedance matching network which allows charge impulses to be measured by a SQUID amplifier with an RMS charge noise of less than 100 e, assuming the SQUID amplifier has a current noise of 2 pA/√Hz, and the current pulse has a duration of about 1 μs or shorter. The component values are provided for an example system which has an RMS charge noise of 91 e, assuming all dissipative circuit elements are cooled to a temperature of 100 mK.

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