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arxiv 1506.04279 v1 pith:N57KOGLW submitted 2015-06-13 physics.ins-det nucl-ex

Low Background Signal Readout Electronics for the MAJORANA DEMONSTRATOR

I. Guinn , N. Abgrall , I.J. Arnquist , F.T. Avignone III , C.X. Baldenegro-Barrera , A.S. Barabash , F.E. Bertrand , A.W. Bradley
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V. Brudanin M. Busch M. Buuck D. Byram A.S. Caldwell Y-D. Chan C.D. Christofferson C. Cuesta J.A. Detwiler Yu. Efremenko H. Ejiri S.R. Elliott A. Galindo-Uribarri T. Gilliss G.K. Giovanetti J. Goett M.P. Green J. Gruszko V.E. Guiseppe R. Henning E.W. Hoppe S. Howard M.A. Howe B.R. Jasinski K.J. Keeter M.F. Kidd S.I. Konovalov R.T. Kouzes B.D. LaFerriere J. Leon J. MacMullin R.D. Martin S.J. Meijer S. Mertens J.L. Orrell C. O'Shaughnessy A.W.P. Poon D.C. Radford J. Rager K. Rielage R.G.H. Robertson E. Romero-Romero B. Shanks M. Shirchenko N. Snyder A.M. Suriano D. Tedeschi J.E. Trimble R.L. Varner S. Vasilyev K. Vetter K. Vorren B.R. White J.F. Wilkerson C. Wiseman W. Xu E. Yakushev C.-H. Yu V. Yumatov I. Zhitnikov
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classification physics.ins-det nucl-ex
keywords backgroundmajoranademonstratordetectorselectronicshpgereadoutroi-tonne-year
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The MAJORANA Collaboration will seek neutrinoless double beta decay (0nbb) 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 with a background goal of <3 counts/ROI-tonne-year, which is expected to scale down to <1 count/ROI-tonne-year for a tonne-scale experiment. The signal readout electronics, which must be placed in close proximity to the detectors, present a challenge toward reaching this background goal. This talk will discuss the materials and design used to construct signal readout electronics with low enough backgrounds for the MAJORANA DEMONSTRATOR.

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