Characterization of 30 [Formula: see text] Ge enriched Broad Energy Ge detectors for GERDA Phase II

M Agostini; A M Bakalyarov; E Andreotti; M Balata; I Barabanov; L Baudis; N Barros; C Bauer; E Bellotti; S Belogurov; G Benato; A Bettini; L Bezrukov; T Bode; D Borowicz; V Brudanin; R Brugnera; D Budjáš; A Caldwell; C Cattadori; A Chernogorov; V D'Andrea; E V Demidova; N Di Marco; A Domula; E Doroshkevich; V Egorov; R Falkenstein; K Freund; A Gangapshev; A Garfagnini; C Gooch; P Grabmayr; V Gurentsov; K Gusev; J Hakenmüller; A Hegai; M Heisel; S Hemmer; R Hiller; W Hofmann; M Hult; L V Inzhechik; 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; B Lehnert; Y Liao; M Lindner; I Lippi; A Lubashevskiy; B Lubsandorzhiev; G Lutter; C Macolino; B Majorovits; W Maneschg; G Marissens; M Miloradovic; R Mingazheva; M Misiaszek; P Moseev; I Nemchenok; 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; 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; GERDA Collaboration

doi:10.1140/epjc/s10052-019-7353-8

Characterization of 30 $^{76}$ Ge enriched Broad Energy Ge detectors for GERDA Phase II

Eur Phys J C Part Fields. 2019;79(11):978. doi: 10.1140/epjc/s10052-019-7353-8. Epub 2019 Nov 27.

Authors

M Agostini¹, A M Bakalyarov², E Andreotti³, M Balata⁴, I Barabanov⁵, L Baudis⁶, N Barros⁷, C Bauer⁸, E Bellotti^{9

10}, S Belogurov^{5

11}, G Benato⁶, A Bettini^{12

13}, L Bezrukov⁵, T Bode¹, D Borowicz¹⁴, V Brudanin¹⁴, R Brugnera^{12

13}, D Budjáš¹, A Caldwell¹⁵, C Cattadori¹⁰, A Chernogorov¹¹, V D'Andrea¹⁶, E V Demidova¹¹, N Di Marco⁴, A Domula⁷, E Doroshkevich⁵, V Egorov¹⁴, R Falkenstein¹⁷, K Freund¹⁷, A Gangapshev^{8

5}, A Garfagnini^{12

13}, C Gooch¹⁵, P Grabmayr¹⁷, V Gurentsov⁵, K Gusev^{14

2

1}, J Hakenmüller⁸, A Hegai¹⁷, M Heisel⁸, S Hemmer¹³, R Hiller⁶, W Hofmann⁸, M Hult³, L V Inzhechik⁵, J Janicskó Csáthy¹, J Jochum¹⁷, M Junker⁴, V Kazalov⁵, Y Kermaïdic⁸, T Kihm⁸, I V Kirpichnikov¹¹, A Kirsch⁸, A Kish⁶, A Klimenko^{14

8}, R Kneißl¹⁵, K T Knöpfle⁸, O Kochetov¹⁴, V N Kornoukhov^{5

11}, V V Kuzminov⁵, M Laubenstein⁴, A Lazzaro¹, B Lehnert⁷, Y Liao¹⁵, M Lindner⁸, I Lippi¹³, A Lubashevskiy¹⁴, B Lubsandorzhiev⁵, G Lutter³, C Macolino⁴, B Majorovits¹⁵, W Maneschg⁸, G Marissens³, M Miloradovic⁶, R Mingazheva⁶, M Misiaszek¹⁸, P Moseev⁵, I Nemchenok¹⁴, K Panas¹⁸, L Pandola¹⁹, K Pelczar⁴, A Pullia²⁰, C Ransom⁶, S Riboldi²⁰, N Rumyantseva^{14

2}, C Sada^{12

13}, F Salamida¹⁶, M Salathe⁸, C Schmitt¹⁷, B Schneider⁷, S Schönert¹, A-K Schütz¹⁷, O Schulz¹⁵, B Schwingenheuer⁸, O Selivanenko⁵, E Shevchik¹⁴, M Shirchenko¹⁴, H Simgen⁸, A Smolnikov^{14

8}, L Stanco¹³, L Vanhoefer¹⁵, A A Vasenko¹¹, A Veresnikova⁵, K von Sturm^{12

13}, V Wagner⁸, A Wegmann⁸, T Wester⁷, C Wiesinger¹, M Wojcik¹⁸, E Yanovich⁵, I Zhitnikov¹⁴, S V Zhukov², D Zinatulina¹⁴, A J Zsigmond¹⁵, K Zuber⁷, G Zuzel¹⁸; GERDA Collaboration

Affiliations

¹ 16Physik Department and Excellence Cluster Universe, Technische Universität München, Munich, Germany.
² 14National Research Centre "Kurchatov Institute", Moscow, Russia.
³ 7European Commission, JRC-Geel, Geel, Belgium.
⁴ 1INFN Laboratori Nazionali del Gran Sasso, LNGS, Assergi, Italy.
⁵ 12Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia.
⁶ 20Physik Institut der Universität Zürich, Zurich, Switzerland.
⁷ 5Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden, Germany.
⁸ 8Max-Planck-Institut für Kernphysik, Heidelberg, Germany.
⁹ 9Dipartimento di Fisica, Università Milano Bicocca, Milan, Italy.
¹⁰ INFN Milano Bicocca, Milan, Italy.
¹¹ Institute for Theoretical and Experimental Physics, NRC "Kurchatov Institute", Moscow, Russia.
¹² 17Dipartimento di Fisica e Astronomia dell'Università di Padova, Padua, Italy.
¹³ INFN Padova, Padua, Italy.
¹⁴ 6Joint Institute for Nuclear Research, Dubna, Russia.
¹⁵ 15Max-Planck-Institut für Physik, Munich, Germany.
¹⁶ 2INFN Laboratori Nazionali del Gran Sasso and Università degli Studi dell'Aquila, L'Aquila, Italy.
¹⁷ 19Physikalisches Institut, Eberhard Karls Universität Tübingen, Tübingen, Germany.
¹⁸ 4Institute of Physics, Jagiellonian University, Cracow, Poland.
¹⁹ 3INFN Laboratori Nazionali del Sud, Catania, Italy.
²⁰ 11Dipartimento di Fisica, Università degli Studi di Milano e INFN Milano, Milan, Italy.

Abstract

The GERmanium Detector Array (Gerda) is a low background experiment located at the Laboratori Nazionali del Gran Sasso in Italy, which searches for neutrinoless double-beta decay of $^{76}$ Ge into $^{76}$ Se+2e $^{-}$ . Gerda has been conceived in two phases. Phase II, which started in December 2015, features several novelties including 30 new ⁷⁶Ge enriched detectors. These were manufactured according to the Broad Energy Germanium (BEGe) detector design that has a better background discrimination capability and energy resolution compared to formerly widely-used types. Prior to their installation, the new BEGe detectors were mounted in vacuum cryostats and characterized in detail in the Hades underground laboratory in Belgium. This paper describes the properties and the overall performance of these detectors during operation in vacuum. The characterization campaign provided not only direct input for Gerda Phase II data collection and analyses, but also allowed to study detector phenomena, detector correlations as well as to test the accuracy of pulse shape simulation codes.