Dzhelepov Laboratory of Nuclear Problems

Date and Time: Monday, 19 October 2020, at 3:00 PM

Venue: Online conference in Zoom

Seminar topic: “EDELWEISS/RICOCHET: Joint project for Direct Dark Matter search and precision study of CEνNS with new cryogenic detectors”

Speaker: E. A. Yakushev

Abstract:

In direct searches for Dark Matter (DM) a technology developing by EDELWEISS experiment is arrays of Ge mono-crystal detectors operated at a temperature of few mK. A simultaneous measurement of ionization and heat signals allows efficient identification of nuclear and electron recoils. New results demonstrated the high relevance of cryogenic Ge detectors for the search of DM interactions producing eV-scale signals. The same technology and detectors will be applied for precision measurements of CEvNS in the region of full coherency in the Ricochet experiment (reactor neutrinos). Due to direct energy reconstruction (heat signal) the main uncertainty arising due to not well-known quenching in germanium will be avoided. 1 kg of new cryogenic detectors (developing thanks to joint R&D of EDELWEISS and Ricochet teams) will be integrated in the Ricochet. The first phase is going to be performed at ILL (Grenoble, France) site, on a distance at about 8 m from the 58 MW nuclear reactor, with first results expected to 2025. In addition to the main goal: precise (1% level) study of CEvNS the experiment will target NMM and other New physics phenomena. Possibility of further phases of the experiment at a Nuclear power plant (a 3.2 GW reactor) at Russia is under investigation.

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