Orateurs
Description
The EDELWEISS collaboration performs light Dark Matter (DM) particle searches with high-purity germanium bolometers collecting both charge and phonon signals. Our recent results (PhysRevD.106.062004) using NbSi Transition Edge Sensor (TES) equipped detectors operated underground at the Laboratoire Souterrain de Modane (LSM) has shown the high relevance of this technology for future dark matter searches. As most cryogenic dark matter experiments, this study was limited by unknown low-energy backgrounds. In this context, the EDELWEISS collaboration, as part of its SubGeV program, is working on a new design of germanium bolometers using NbSi TES : CRYOSEL. These innovative TES phonon sensors called Super conducting Single Electron Device (SSED) will be sensitive to the athermal phonons induced by the amplification of a single charge drifting in the strong electric field generated in the detector and hence, will be able to discriminate against our main low-energy background, which is not affected by this amplification.
