The COBRA demonstrator at the LNGS underground laboratory

  • J. Ebert
  • , M. Fritts
  • , D. Gehre
  • , C. Gößling
  • , T. Göpfert
  • , C. Hagner
  • , N. Heidrich
  • , R. Klingenberg
  • , T. Köttig
  • , K. Kröninger
  • , T. Michel
  • , T. Neddermann
  • , C. Nitsch
  • , C. Oldorf
  • , T. Quante
  • , S. Rajek
  • , H. Rebber
  • , O. Reinecke
  • , K. Rohatsch
  • , O. Schulz
  • A. Sörensen, I. Stekl, J. Tebrügge, R. Temminghoff, R. Theinert, J. Timm, T. Wester, B. Wonsak, S. Zatschler, K. Zuber

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

The COBRA demonstrator, a prototype for a large-scale experiment searching for neutrinoless double beta-decay, was built at the underground laboratory Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It consists of an array of 64 monolithic, calorimetric CdZnTe semiconductor detectors with a coplanar-grid design and a total mass of 380 g. It is used to investigate the experimental challenges faced when operating CdZnTe detectors in low-background mode, to identify potential background sources and to show the long-term stability of the detectors. The first data-taking period started in 2011 with a subset of the detectors, while the demonstrator was completed in November 2013. To date, more than 250 kg d of data have been collected. This paper describes the technical details of the experimental setup and the hardware components.

Original languageEnglish (US)
Pages (from-to)114-120
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume807
DOIs
StatePublished - Jan 21 2016

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

Keywords

  • CZT
  • CdZnTe
  • Coplanar-grid
  • Neutrinoless double beta-decay
  • Semiconductor detector

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