Upgrade for Phase\ua0II of the Gerda experiment
- Agostini, M.
- Bakalyarov, A. M.
- Balata, M.
- Barabanov, I.
- Baudis, L.
- Bauer, C.
- Bellotti, E.
- Belogurov, S.
- Belyaev, S. T.
- Benato, G.
- Bettini, A.
- Bezrukov, L.
- Bode, T.
- Borowicz, D.
- Brudanin, V.
- Brugnera, R.
- Caldwell, A.
- Cattadori, C.
- Chernogorov, A.
- D\u2019Andrea, V.
- Demidova, E. V.
- Di Marco, N.
- Domula, A.
- Doroshkevich, E.
- Egorov, V.
- Falkenstein, R.
- Frodyma, N.
- Gangapshev, A.
- Garfagnini, A.
- Grabmayr, P.
- Gurentsov, V.
- Gusev, K.
- Hakenm\ufcller, J.
- Hegai, A.
- Heisel, M.
- Hemmer, S.
- Hiller, R.
- Hofmann, W.
- Hult, M.
- Inzhechik, L. V.
- Ioannucci, L.
- Janicsk\uf3 Cs\ue1thy, J.
- Jochum, J.
- Junker, M.
- Kazalov, V.
- Kerma\uefdic, Y.
- Kihm, T.
- Kirpichnikov, I. V.
- Kirsch, A.
- Kish, A.
- Klimenko, A.
- Knei fl, R.
- Kn\uf6pfle, K. T.
- Kochetov, O.
- Kornoukhov, V. N.
- Kuzminov, V. V.
- Laubenstein, M.
- Lazzaro, A.
- Lebedev, V. I.
- Lehnert, B.
- Lindner, M.
- Lippi, I.
- Lubashevskiy, A.
- Lubsandorzhiev, B.
- Lutter, G.
- Macolino, C.
- Majorovits, B.
- Maneschg, W.
- Medinaceli, E.
- Miloradovic, M.
- Mingazheva, R.
- Misiaszek, M.
- Moseev, P.
- Nemchenok, I.
- Nisi, S.
- Panas, K.
- Pandola, L.
- Pelczar, K.
- Pullia, A.
- Ransom, C.
- Riboldi, S.
- Rumyantseva, N.
- Sada, C.
- Salamida, F.
- Salathe, M.
- Schmitt, C.
- Schneider, B.
- Sch\uf6nert, S.
- Schreiner, J.
- Sch\ufctz, A. -K.
- Schulz, O.
- Schwingenheuer, B.
- Selivanenko, O.
- Shevchik, E.
- Shirchenko, M.
- Simgen, H.
- Smolnikov, A.
- Stanco, L.
- Vanhoefer, L.
- Vasenko, A. A.
- Veresnikova, A.
- von Sturm, K.
- Wagner, V.
- Wegmann, A.
- Wester, T.
- Wiesinger, C.
- Wojcik, M.
- Yanovich, E.
- Zhitnikov, I.
- Zhukov, S. V.
- Zinatulina, D.
- Zsigmond, A. J.
- Zuber, K.
- Zuzel, G.
DOIAbstract
The Gerda collaboration is performing a sensitive search for neutrinoless double beta decay of Ge-76 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 (100 kg year). It will reach thereby a half-life sensitivity of more than 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 o...
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