Low Background Signal Readout Electronics for the Majorana Demonstrator

Conference · Thu Jun 11 04:00:00 EDT 2015

DOI:https://doi.org/10.1063/1.4927982· OSTI ID:1184611

Guinn, Ian ^[1]; Rielage, Keith Robert ^[2]; Elliott, Steven Ray ^[2]; Xu, Wenqin ^[2]; Goett, John Jerome III ^[2]

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1. University of Washington
2. Los Alamos National Laboratory

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.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: LDRD
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1184611
• Report Number(s): LA-UR-15-24398
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Atomic and Nuclear Physics