A new approach to the front-end readout of cryogenic ionization detectors

TL;DR

This paper introduces a compact, low-background front-end readout circuit for cryogenic ionization detectors, reducing component count and space to minimize interference in low-signal experiments.

Contribution

A novel, simplified readout circuit design that minimizes components and space near the detector, reducing background noise in sensitive experiments.

Findings

Reduces detector background interference

Uses only two cables for biasing and readout

Simplifies the front-end readout design

Abstract

We present a novel approach to the readout of ionization detectors. The solution allows to minimize the number of components and the space occupation close to the detector. This way a minimal impact is added on the radioactive background in those experiments where very low signal rates are expected, such as GERDA and MAJORANA. The circuit consists in a JFET transistor and a remote second stage. The DC feedback path is closed using a diode. Two signal cables are only necessary for biasing and readout.