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Abgrall, N.; Arnquist, I.J.; Avignone, F.T.; Barabash, A.S.; Bertrand, F.E.; Bradley, A.W.; Brudanin, V.; Busch, M.; Buuck, M.; Byram, D.; Caldwell, A.S.; Chan, Y-D.; Christofferson, C.D.; Chu, P.-H.; Cuesta, C.; Detwiler, J.A.; Doe, P.J.; Dunagan, C.; Efremenko, Yu; Ejiri, H.; Elliott, S.R.; Fu, Z.; Galindo-Uribarri, A.; Giovanetti, G.K.; Goett, J.; Green, M.P.; Gruszko, J.; Guinn, I.S.; Guiseppe, V.E.; Henning, R.; Hoppe, E.W.; Howard, S.; Howe, M.A.; Jasinski, B.R.; Keeter, K.J.; Kidd, M.F.; Konovalov, S.I.; Kouzes, R.T.; LaFerriere, B.D.; Leon, J.; Li, A.; MacMullin, J.; Martin, R.D.; Massarczyk, R.; Meijer, S.J.; Mertens, S.; Orrell, J.L.; O'Shaughnessy, C.; Poon, A.W.P.; Radford, D.C.; Rager, J.; Rielage, K.; Robertson, R.G.H.; Romero-Romero, E.; Shanks, B.; Shirchenko, M.; Snyder, N.; Suriano, A.M.; Tedeschi, D.; Thompson, A.; Ton, K.T.; Trimble, J.E.; Varner, R.L.; Vasilyev, S.; Vetter, K.; Vorren, K.; White, B.R.; Wilkerson, J.F.; Wiseman, C.; Xu, W.; Yakushev, E.; Yu, C.-H.; Yumatov, V.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 07/2016, Letnik: 823Journal Article
The Majorana Collaboration is constructing the Majorana Demonstrator, an ultra-low background, 44-kg modular high-purity Ge (HPGe) detector array to search for neutrinoless double-beta decay in 76Ge. The phenomenon of surface micro-discharge induced by high-voltage has been studied in the context of the Majorana Demonstrator. This effect can damage the front-end electronics or mimic detector signals. To ensure the correct performance, every high-voltage cable and feedthrough must be capable of supplying HPGe detector operating voltages as high as 5kV without exhibiting discharge. R&D measurements were carried out to understand the testing system and determine the optimum design configuration of the high-voltage path, including different improvements of the cable layout and feedthrough flange model selection. Every cable and feedthrough to be used at the Majorana Demonstrator was characterized and the micro-discharge effects during the Majorana Demonstrator commissioning phase were studied. A stable configuration has been achieved, and the cables and connectors can supply HPGe detector operating voltages without exhibiting discharge.
