The Majorana Low-noise Low-background Front-end Electronics
The MAJORANA DEMONSTRATOR will search for the neutrinoless double beta decay (ββ(0ν) of the isotope 76Ge with a mixed array of enriched and natural Germanium detectors. In view of the next generation of tonne-scale germanium-based (ββ(0ν)-decay searches, a major goal of the MAJORANA DEMONSTRATOR is to demonstrate a path forward to achieving a background rate at or below 1 cnt/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039-keV Q-value of the 76Ge (ββ(0ν)-decay. Such a requirement on the background level significantly constrains the design of the readout electronics, which is further driven by noise and energy resolution performances. We present here the low-noise low background front-end electronics developed for the low-capacitance p-type point contact (P-PC) germanium detectors of the MAJORANA DEMONSTRATOR. This resistive-feedback front-end, specifically designed to have low mass, is fabricated on a radioassayed fused-silica substrate where the feedback resistor consists of a sputtered thin film of high purity amorphous germanium and the feedback capacitor is based on the capacitance between gold conductive traces.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1452871
- Report Number(s):
- PNNL-SA-111627; KB0401022
- Journal Information:
- Physics Procedia, Vol. 61, Issue C; ISSN 1875-3892
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
The MAJORANA DEMONSTRATOR Neutrinoless Double-Beta Decay Experiment
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journal | January 2014 |
ADC Nonlinearity Correction for the Majorana Demonstrator
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journal | March 2021 |
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