The MAJORANA DEMONSTRATOR for 0 νββ : Current Status and Future Plans

M P Green,N Abgrall,E Aguayo,F T Avignone,A S Barabash,F E Bertrand,M Boswell,V B Brudanin,Michael P Busch, D Byram,A S Caldwell,Y D Chan,C D Christofferson,D C Combs,C Cuesta,J A Detwiler, P J Doe,Y V Efremenko,V Egorov,H Ejiri, S R Elliott,J Fast, P Finnerty, F M Fraenkle,A Galindouribarri,G K Giovanetti,J Goett,J Gruszko,V E Guiseppe,K Gusev,A L Hallin,R Hazama,A Hegai,Reyco Henning,E W Hoppe,Samuel M Howard,M A Howe, K J Keeter,M F Kidd, O Kochetov,S I Konovalov,R T Kouzes,B D Laferriere,J Leon, L E Leviner,J C Loach, J Macmullin,S Macmullin,R D Martin,S J Meijer,S Mertens, M Nomachi,J L Orrell, C Oshaughnessy,N R Overman,D G Phillips,A W P Poon,K Pushkin,D C Radford,J P Rager,K Rielage,R G H Robertson,E Romeroromero,M Ronquest,A Schubert,B Shanks,T Shima,M Shirchenko,K J Snavely,N Snyder,A M Suriano,J M Thompson,V Timkin,W Tornow, J E Trimble,R L Varner,S Vasilyev,K Vetter,K Vorren,B R White,J F Wilkerson,C Wiseman,Wei Xu,Euvgeny K Yakushev,A R Young,C H Yu, V Yumatov

Physics Procedia（2015）

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摘要

The MAJORANA DEMONSTRATOR will search for neutrinoless-double-beta decay (0νββ) in 76Ge, while establishing the feasibility of a future tonne-scale germanium-based 0νββ experiment, and performing searches for new physics beyond the Standard Model. The experiment, currently under construction at the Sanford Underground Research Facility in Lead, SD, will consist of a pair of modular high-purity germanium detector arrays housed inside of a compact copper, lead, and polyethylene shield. Through a combination of strict materials qualifications and assay, low-background design, and powerful background rejection techniques, the Demonstrator aims to achieve a background rate in the 0νββ region of interest (ROI) of no more than 3 counts in the 0νββ-decay ROI per tonne of target isotope per year (cnts/(ROI-t-y)). The current status of the Demonstrator is discussed, as are plans for its completion.

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关键词

germanium detector,neutrinoless double beta decay

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