학술논문
Upgrade for Phase II of the Gerda experiment
Document Type
article
Author
GERDA Collaboration; Agostini, M; Bakalyarov, AM; Balata, M; Barabanov, I; Baudis, L; Bauer, C; Bellotti, E; Belogurov, S; Belyaev, ST; Benato, G; Bettini, A; Bezrukov, L; Bode, T; Borowicz, D; Brudanin, V; Brugnera, R; Caldwell, A; Cattadori, C; Chernogorov, A; D’Andrea, V; Demidova, EV; Di Marco, N; Domula, A; Doroshkevich, E; Egorov, V; Falkenstein, R; Frodyma, N; Gangapshev, A; Garfagnini, A; Grabmayr, P; Gurentsov, V; Gusev, K; Hakenmüller, J; Hegai, A; Heisel, M; Hemmer, S; Hiller, R; Hofmann, W; Hult, M; Inzhechik, LV; Ioannucci, L; Janicskó Csáthy, J; Jochum, J; Junker, M; Kazalov, V; Kermaïdic, Y; Kihm, T; Kirpichnikov, IV; Kirsch, A; Kish, A; Klimenko, A; Kneißl, R; Knöpfle, KT; Kochetov, O; Kornoukhov, VN; Kuzminov, VV; Laubenstein, M; Lazzaro, A; Lebedev, VI; 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; Schönert, S; Schreiner, J; Schütz, A-K; Schulz, O; Schwingenheuer, B; Selivanenko, O; Shevchik, E; Shirchenko, M; Simgen, H; Smolnikov, A; Stanco, L; Vanhoefer, L
Source
European Physical Journal C. 78(5)
Subject
Language
Abstract
The Gerda collaboration is performing a sensitive search for neutrinoless double beta decay of 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 (100 kgyear). It will reach thereby a half-life sensitivity of more than 10 26 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.