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Title: Low background signal readout electronics for the MAJORANA DEMONSTRATOR

The MAJORANA Collaboration will seek neutrinoless double beta decay (0νββ) in {sup 76}Ge using isotopically enriched p-type point contact (PPC) high purity Germanium (HPGe) detectors. A tonne-scale array of HPGe detectors would require background levels below 1 count/ROI-tonne-year in the 4 keV region of interest (ROI) around the 2039 keV Q-value of the decay. In order to demonstrate the feasibility of such an experiment, the MAJORANA DEMONSTRATOR, a 40 kg HPGe detector array, is being constructed with a background goal of < 3 count/ROI-tonne-year, which is expected to scale down to < 1 count/ROI-tonne-year for a tonne-scale experiment. The signal readout electronics, which must be placed in close proximity to the detectors, present a challenge toward reaching this background goal. This talk will discuss the materials and design used to construct signal readout electronics with low enough backgrounds for the MAJORANA DEMONSTRATOR.
Authors:
; ; ; ; ; ;  [1] ; ; ; ; ;  [2] ; ; ; ; ;  [3] ;  [4] ;  [5] ; more »;  [6] ; « less
  1. Center for Experimental Nuclear Physics and Astrophysics, and Department of Physics, University of Washington, Seattle, WA (United States)
  2. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA (United States)
  3. Pacific Northwest National Laboratory, Richland, WA (United States)
  4. Department of Physics and Astronomy, University of South Carolina, Columbia, SC (United States)
  5. (United States)
  6. Oak Ridge National Laboratory, Oak Ridge, TN (United States)
Publication Date:
OSTI Identifier:
22488700
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1672; Journal Issue: 1; Conference: LRT 2015: 5. international workshop in low radioactivity techniques, Seattle, WA (United States), 18-20 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; DESIGN; DOUBLE BETA DECAY; EXPERIMENT PLANNING; GERMANIUM 76; HIGH-PURITY GE DETECTORS; KEV RANGE; P-TYPE CONDUCTORS; Q-VALUE; READOUT SYSTEMS