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Full Inter-Digitized Detectors For The EDELWEISS-II Dark Matter Search

Abstract : A new design for the Ge bolometers of the EDELWEISS project is described here, based on innovative interleaved charge collection electrodes with high background discrimination capabilities. The measured surface event rejection is compatible with WIMP sensitivity levels down to 10(-) 9 picobarn (pb). Use of interleaved electrodes on the overall surface of the Ge crystal, including its lateral surface, results to a high fiducial volume of the order of 80%. Electronic setup is fairly simple with a total of five JFET based read-out amplifiers, one for the NTD-Ge heat channel and four for the ionization signal. Fabrication process is quite simple and the design is easily scalable to higher mass bolometers (1 kg Ge crystal), making it very appealing for the future 1 ton scale EUREKA Dark Matter experiment.
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Contributor : Christine Hadrossek Connect in order to contact the contributor
Submitted on : Wednesday, March 21, 2012 - 1:27:39 PM
Last modification on : Friday, October 8, 2021 - 9:40:01 AM


  • HAL Id : in2p3-00681379, version 1



S. Marnieros, E. Armengaud, C. Augier, L. Berge, Angélique Benoit, et al.. Full Inter-Digitized Detectors For The EDELWEISS-II Dark Matter Search. 13th International Workshop on Low Temperature Detectors, Jul 2009, Stanford, United States. pp.635-638. ⟨in2p3-00681379⟩



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