Upgrade for Phase II of the Gerda experiment

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ID: 270534
2018
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Abstract
The Gerda collaboration is performing a sensitive search for neutrinoless double beta decay of \(^{76}\hbox {Ge}\) 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 (\(\hbox {100 kg}~\hbox {year}\)). 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.
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Authors Matteo Agostini,GERDA Collaboration,A. M. Bakalyarov,M. Balata,I. Barabanov,Laura Baudis,C. Bauer,E. Bellotti,S. Belogurov,S. T. Belyaev,Giovanni Benato,A. Bettini,Leonid Bezrukov,T. Bode,D. Borowicz,V. Brudanin,R. Brugnera,A. Caldwell,C. Cattadori,A. Chernogorov,Valerio 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,Konstantin 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,Matthias Bernhard 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,Bjoern Lehnert,M. Lindner,Ivano Lippi,A. Lubashevskiy,B. Lubsandorzhiev,Guillaume Lutter,C. Macolino,B. Majorovits,W. Maneschg,E. Medinaceli,M. Miloradovic,R. Mingazheva,M. Misiaszek,P. Moseev,I. Nemchenok,S. Nisi,Krzysztof Panas,L. Pandola,K. Pelczar,Alberto Pullia,C. Ransom,S. Riboldi,N. Rumyantseva,C. Sada,Francesco Salamida,M. Salathe,C. Schmitt,B. Schneider,Stefan Schönert,J. Schreiner,A-K. Schütz,O. Schulz,B. Schwingenheuer,O. Selivanenko,Egor 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,Anna Zsigmond,K. Zuber,G. Zuzel;Matteo Agostini;GERDA Collaboration;A. M. Bakalyarov;M. Balata;I. Barabanov;Laura Baudis;C. Bauer;E. Bellotti;S. Belogurov;S. T. Belyaev;Giovanni Benato;A. Bettini;Leonid Bezrukov;T. Bode;D. Borowicz;V. Brudanin;R. Brugnera;A. Caldwell;C. Cattadori;A. Chernogorov;Valerio 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;Konstantin 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;Matthias Bernhard 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;Bjoern Lehnert;M. Lindner;Ivano Lippi;A. Lubashevskiy;B. Lubsandorzhiev;Guillaume Lutter;C. Macolino;B. Majorovits;W. Maneschg;E. Medinaceli;M. Miloradovic;R. Mingazheva;M. Misiaszek;P. Moseev;I. Nemchenok;S. Nisi;Krzysztof Panas;L. Pandola;K. Pelczar;Alberto Pullia;C. Ransom;S. Riboldi;N. Rumyantseva;C. Sada;Francesco Salamida;M. Salathe;C. Schmitt;B. Schneider;Stefan Schönert;J. Schreiner;A-K. Schütz;O. Schulz;B. Schwingenheuer;O. Selivanenko;Egor 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;Anna Zsigmond;K. Zuber;G. Zuzel;
Journal the european physical journal c
Year 2018
DOI 10.1140/epjc/s10052-018-5812-2
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