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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 76Ge 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. The DEMONSTRATOR has a background goal of < 3 counts/ROI-tonne-year, which is expected to scale down to < 1 count/ROI-tonne-year for a one tonne experiment. The signal readout electronics, which must be placed in close proximity to the detectors, present a challenge toward reaching this background goal. This paper discusses the materials and design used to construct signal readout electronics with low enough backgrounds for the MAJORANA DEMONSTRATOR.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2]
  1. University of Washington
  2. Los Alamos National Laboratory
Publication Date:
OSTI Identifier:
1184611
Report Number(s):
LA-UR-15-24398
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: Low Radioactivity Techniques ; 2015-03-18 - 2015-03-20 ; Seattle, Washington, United States
Research Org:
Los Alamos National Laboratory (LANL)
Sponsoring Org:
LDRD
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS Atomic and Nuclear Physics