European Physical Journal C: Particles and Fields (May 2018)

Upgrade for Phase II of the Gerda experiment

  • GERDA Collaboration,
  • M. Agostini,
  • A. M. Bakalyarov,
  • M. Balata,
  • I. Barabanov,
  • L. Baudis,
  • C. Bauer,
  • E. Bellotti,
  • S. Belogurov,
  • S. T. Belyaev,
  • G. Benato,
  • A. Bettini,
  • L. Bezrukov,
  • T. Bode,
  • D. Borowicz,
  • V. Brudanin,
  • R. Brugnera,
  • A. Caldwell,
  • C. Cattadori,
  • A. Chernogorov,
  • V. D’Andrea,
  • E. V. Demidova,
  • N. Di Marco,
  • A. Domula,
  • E. Doroshkevich,
  • V. Egorov,
  • R. Falkenstein,
  • N. Frodyma,
  • A. Gangapshev,
  • A. Garfagnini,
  • P. Grabmayr,
  • V. Gurentsov,
  • K. Gusev,
  • J. Hakenmüller,
  • A. Hegai,
  • M. Heisel,
  • S. Hemmer,
  • R. Hiller,
  • W. Hofmann,
  • M. Hult,
  • L. V. Inzhechik,
  • L. Ioannucci,
  • J. Janicskó Csáthy,
  • J. Jochum,
  • M. Junker,
  • V. Kazalov,
  • Y. Kermaïdic,
  • T. Kihm,
  • I. V. Kirpichnikov,
  • A. Kirsch,
  • A. Kish,
  • A. Klimenko,
  • R. Kneißl,
  • K. T. Knöpfle,
  • O. Kochetov,
  • V. N. Kornoukhov,
  • V. V. Kuzminov,
  • M. Laubenstein,
  • A. Lazzaro,
  • V. I. Lebedev,
  • B. Lehnert,
  • M. Lindner,
  • I. Lippi,
  • A. Lubashevskiy,
  • B. Lubsandorzhiev,
  • G. Lutter,
  • C. Macolino,
  • B. Majorovits,
  • W. Maneschg,
  • E. Medinaceli,
  • M. Miloradovic,
  • R. Mingazheva,
  • M. Misiaszek,
  • P. Moseev,
  • I. Nemchenok,
  • S. Nisi,
  • K. Panas,
  • L. Pandola,
  • K. Pelczar,
  • A. Pullia,
  • C. Ransom,
  • S. Riboldi,
  • N. Rumyantseva,
  • C. Sada,
  • F. Salamida,
  • M. Salathe,
  • C. Schmitt,
  • B. Schneider,
  • S. Schönert,
  • J. Schreiner,
  • A-K. Schütz,
  • O. Schulz,
  • B. Schwingenheuer,
  • O. Selivanenko,
  • E. Shevchik,
  • M. Shirchenko,
  • H. Simgen,
  • A. Smolnikov,
  • L. Stanco,
  • L. Vanhoefer,
  • A. A. Vasenko,
  • A. Veresnikova,
  • K. von Sturm,
  • V. Wagner,
  • A. Wegmann,
  • T. Wester,
  • C. Wiesinger,
  • M. Wojcik,
  • E. Yanovich,
  • I. Zhitnikov,
  • S. V. Zhukov,
  • D. Zinatulina,
  • A. J. Zsigmond,
  • K. Zuber,
  • G. Zuzel

DOI
https://doi.org/10.1140/epjc/s10052-018-5812-2
Journal volume & issue
Vol. 78, no. 5
pp. 1 – 30

Abstract

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Abstract The Gerda collaboration is performing a sensitive search for neutrinoless double beta decay of $$^{76}\hbox {Ge}$$ 76Ge at the INFN Laboratori Nazionali del Gran Sasso, Italy. The upgrade of the Gerda experiment from Phase I to Phase II has been concluded in December 2015. The first Phase II data release shows that the goal to suppress the background by one order of magnitude compared to Phase I has been achieved. Gerda is thus the first experiment that will remain “background-free” up to its design exposure ($$\hbox {100 kg}~\hbox {year}$$ 100 kgyear ). It will reach thereby a half-life sensitivity of more than $$10^{26}$$ 1026 year within 3 years of data collection. This paper describes in detail the modifications and improvements of the experimental setup for Phase II and discusses the performance of individual detector components.