PNNL

Abstract

The Majorana Demonstrator, an array of high purity germanium detectors, was constructed to search for the neutrinoless double-beta decay in 76Ge and other physics beyond the Standard Model. To achieve these goals, the readout electronics were designed to have low electronic noise, and radioactive backgrounds were minimized by using low-mass components and low radio activity materials near the detectors. This paper provides a description of all components of the Majorana Demonstrator readout electronics, spanning the front-end electronics and internal cabling, back-end electronics, digitizer, and power supplies, along with the grounding scheme. The spectroscopic performance achieved with these readout electronics is also demonstrated.