Status of the MAJORANA DEMONSTRATOR

S Vasilyev,G K Giovanetti,R L Varner,R G H Robertson,J Macmullin,N Snyder,J Gruszko,N Abgrall,C D Christofferson,M Shirchenko,C Cuesta,C X Balderrot-Barrera,S J Meijer,A W P Poon,K Vorren,B R Jasinski,A Galindo-Uribarri,M Buuck,E Yakushev,D Byram,D C Radford,T Gilliss,B Shanks,J F Wilkerson,C Wiseman,F T Avignone,J Goett,M A Howe,I J Arnquist,V E Guiseppe,J Rager,E Romero-Romero,J E Trimble,I Zhitnikov,A S Barabash,M F Kidd,J A Detwiler,A M Suriano,M P Green,A Bradley ,Y V Efremenko ,Richard T Kouzes ,D J Tedeschi ,I S Guinn ,Y D Chan ,C.‐H Yu ,A Caldwell ,С И Коновалов ,F Bertrand ,C O’Shaughnessy,J Leon,K Vetter,S Howard,R D Martin,H Ejiri,K E Keeter,B R White,V Yumatov,E W Hoppe,R Henning,M Busch,V Brudanin,S R Elliott,J L Orrell,W Xu,S Mertens,B D Laferriere,K Rielage

doi:10.1134/s1063779616060253

Abstract

The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, an ultralow background, 40-kg modular high purity Ge (HPGe) detector array to search for neutrinoless double-beta decay (0νββ-decay) in 76Ge. The goal of the experiment is to demonstrate a background rate at or below 3 counts/(t-y) in the 4 keV region of interest (ROI) around the 2039 keV Q-value for 76Ge 0νββ-decay. In this paper, the status of the MAJORANA DEMONSTRATOR, including its design and measurements of properties of the HPGe crystals is presented.

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