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High voltage testing for the Majorana Demonstrator

  • Author(s): Abgrall, N
  • Arnquist, IJ
  • Avignone, FT
  • Barabash, AS
  • Bertrand, FE
  • Bradley, AW
  • Brudanin, V
  • Busch, M
  • Buuck, M
  • Byram, D
  • Caldwell, AS
  • Chan, Y-D
  • Christofferson, CD
  • Chu, P-H
  • Cuesta, C
  • Detwiler, JA
  • Doe, PJ
  • Dunagan, C
  • Efremenko, Yu
  • Ejiri, H
  • Elliott, SR
  • Fu, Z
  • Galindo-Uribarri, A
  • Giovanetti, GK
  • Goett, J
  • Green, MP
  • Gruszko, J
  • Guinn, IS
  • Guiseppe, VE
  • Henning, R
  • Hoppe, EW
  • Howard, S
  • Howe, MA
  • Jasinski, BR
  • Keeter, KJ
  • Kidd, MF
  • Konovalov, SI
  • Kouzes, RT
  • LaFerriere, BD
  • Leon, J
  • Li, A
  • MacMullin, J
  • Martin, RD
  • Massarczyk, R
  • Meijer, SJ
  • Mertens, S
  • Orrell, JL
  • O'Shaughnessy, C
  • Poon, AWP
  • Radford, DC
  • Rager, J
  • Rielage, K
  • Robertson, RGH
  • Romero-Romero, E
  • Shanks, B
  • Shirchenko, M
  • Snyder, N
  • Suriano, AM
  • Tedeschi, D
  • Thompson, A
  • Ton, KT
  • Trimble, JE
  • Varner, RL
  • Vasilyev, S
  • Vetter, K
  • Vorren, K
  • White, BR
  • Wilkerson, JF
  • Wiseman, C
  • Xu, W
  • Yakushev, E
  • Yu, C-H
  • Yumatov, V
  • et al.

© 2016 Elsevier B.V. All rights reserved. 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 5 kV 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.

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