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Abgrall, N.; Aguayo, E.; Avignone, F.T.; Barabash, A.S.; Bertrand, F.E.; Boswell, M.; Brudanin, V.; Busch, M.; Byram, D.; Caldwell, A.S.; Chan, Y-D.; Christofferson, C.D.; Combs, D.C.; Cuesta, C.; Detwiler, J.A.; Doe, P.J.; Efremenko, Yu; Egorov, V.; Ejiri, H.; Elliott, S.R.; Fast, J.E.; Finnerty, P.; Fraenkle, F.M.; Galindo-Uribarri, A.; Giovanetti, G.K.; Goett, J.; Green, M.P.; Gruszko, J.; Guiseppe, V.E.; Gusev, K.; Hallin, A.L.; Hazama, R.; Hegai, A.; Henning, R.; Hoppe, E.W.; Howard, S.; Howe, M.A.; Keeter, K.J.; Kidd, M.F.; Kochetov, O.; Konovalov, S.I.; Kouzes, R.T.; LaFerriere, B.D.; Leon, J.; Leviner, L.E.; Loach, J.C.; MacMullin, J.; MacMullin, S.; Martin, R.D.; Meijer, S.; Mertens, S.; Nomachi, M.; Orrell, J.L.; O'Shaughnessy, C.; Overman, N.R.; Phillips, D.G.; Poon, A.W.P.; Pushkin, K.; Radford, D.C.; Rager, J.; Rielage, K.; Robertson, R.G.H.; Romero-Romero, E.; Ronquest, M.C.; Schubert, A.G.; Shanks, B.; Shima, T.; Shirchenko, M.; Snavely, K.J.; Snyder, N.; Suriano, A.M.; Thompson, J.; Timkin, V.; Tornow, W.; Trimble, J.E.; Varner, R.L.; Vasilyev, S.; Vetter, K.; Vorren, K.; White, B.R.; Wilkerson, J.F.; Wiseman, C.; Xu, W.; Yakushev, E.; Young, A.R.; Yu, C.-H.; Yumatov, V.
Physics procedia, 01/2015, Letnik: 61, Številka: CJournal Article
The MAJORANA DEMONSTRATOR will search for the neutrinoless double beta decay (ββ(0ν)) of the isotope 76Ge with a mixed array of enriched and natural germanium detectors. In view of the next generation of tonne-scale germanium-based ββ(0ν)-decay searches, a major goal of the MAJORANA DEMONSTRATOR is to demonstrate a path forward to achieving a background rate at or below 1 cnt/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039-keV Q-value of the 76Ge ββ(0ν)-decay. Such a requirement on the background level significantly constrains the design of the readout electronics, which is further driven by noise and energy resolution performances. We present here the low-noise low- background front-end electronics developed for the low-capacitance p-type point contact (P-PC) germanium detectors of the MAJORANA DEMONSTRATOR. This resistive-feedback front-end, specifically designed to have low mass, is fabricated on a radioassayed fused-silica substrate where the feedback resistor consists of a sputtered thin film of high purity amorphous germanium and the feedback capacitor is based on the capacitance between gold conductive traces.
