Status of the MAJORANA DEMONSTRATOR
- University of Washington, Seattle
- Lawrence Berkeley National Laboratory (LBNL)
- Pacific Northwest National Laboratory (PNNL)
- University of South Carolina
- Oak Ridge National Laboratory (ORNL)
- Institute of Theoretical & Experimental Physics (ITEP), Moscow, Russia
- Joint Institute for Nuclear Research, Dubna, Russia
- Duke University/TUNL
- University of South Dakota
- South Dakota School of Mines and Technology
- Los Alamos National Laboratory (LANL)
- University of Tennessee, Knoxville (UTK)
- Osaka University, Japan
- University of North Carolina, Chapel Hill / Triangle Universities Nuclear Laboratory, Durham, NC
- University of North Carolina / Triangle Universities Nuclear Lababoratory, Durham
- University of South Carolina, Columbia
- Black Hills State University, Spearfish, South Dakota
- Tennessee Technological University (TTU)
- UNC/Triangle Univ. Nucl. Lab, Durham, NC/ORNL
The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, an ultra-low background, modular, HPGe detector array with a mass of 44-kg (29 kg Ge-76 and 15 kg Ge-nat) to search for neutrinoless double beta decay in Ge-76. 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 MAJO-RANA 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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1343522
- Resource Relation:
- Journal Volume: 1685; Conference: Workshop on Calculation of Double-beta-decay Matrix Elements (MEDEX '15) - Prague, , Czech Republic - 6/9/2015 12:00:00 AM-6/12/2015 12:00:00 AM
- Country of Publication:
- United States
- Language:
- English
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Status of the MAJORANA DEMONSTRATOR
The Majorana Demonstrator search for neutrinoless double beta decay