Abstract
The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, an ultra-low background, modular, HPGe detector array with a mass of 44-kg (29 kg 76Ge and 15 kg natGe) to search for neutrinoless double beta decay in 76Ge. The next generation of tonne-scale Ge-based neutrinoless double beta decay searches will probe the neutrino mass scale in the inverted-hierarchy region. The MAJORANA DEMONSTRATOR is envisioned to demonstrate a path forward to achieve a background rate at or below 1 count/tonne/year in the 4 keV region of interest around the Q-value of 2039 keV. The MAJORANA DEMONSTRATOR follows a modular implementation to be easily scalable to the next generation experiment. First, the prototype module was assembled; it has been continuously taking data from July 2014 to June 2015. Second, Module 1 with more than half of the total enriched detectors and some natural detectors has been assembled and it is being commissioned. Finally, the assembly of Module 2, which will complete MAJORANA DEMONSTRATOR, is already in progress.
Original language | English |
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Title of host publication | Workshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX 2015 |
Editors | Jouni Suhonen, Ivan Stekl, Osvaldo Civitarese |
Publisher | American Institute of Physics Inc. |
ISBN (Electronic) | 9780735413337 |
DOIs | |
State | Published - Oct 28 2015 |
Event | 10th Workshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX 2015 - Prague, Czech Republic Duration: Jun 9 2015 → Jun 12 2015 |
Publication series
Name | AIP Conference Proceedings |
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Volume | 1686 |
ISSN (Print) | 0094-243X |
ISSN (Electronic) | 1551-7616 |
Conference
Conference | 10th Workshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX 2015 |
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Country/Territory | Czech Republic |
City | Prague |
Period | 06/9/15 → 06/12/15 |
Funding
This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics. We acknowledge support from the Particle and Nuclear Astrophysics Program of the National Science Foundation. We acknowledge support from the Russian Foundation for Basic Research. We thank our hosts and colleagues at the Sanford Underground Research Facility for their support.
Keywords
- Majorana neutrino mass
- germanium detector
- neutrinoless double-beta decay