Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 104: Search for Dark Matter 5

T 104.2: Vortrag

Donnerstag, 24. März 2022, 16:35–16:50, T-H36

remoTES sensors: Development of a novel detector design for NaI cryogenic calorimeters for the COSINUS dark matter experiment — •Mukund Bharadwaj for the COSINUS collaboration — Max Planck Institute for Physics, Fohringer Ring 6, Munich, Germany - 80805

The COSINUS experiment is an upcoming low-threshold, cryogenic experiment being setup at the Laboratori Nazionali Del Gran Sasso, Italy. It aims to provide a model independent cross-check of the DAMA/LIBRA claim of a potential dark-matter like modulating signal, the result of which is contrary to data reported by other direct dark matter experiments over the past few decades.

COSINUS utilizes a dual-channel readout system based on transition edge sensors(TESs) that allows for particle discrimination. It consists of ultra-pure scintillating sodium iodide (NaI) crystals enclosed by a silicon detector which function as the phonon and light channels respectively. The physical and chemical properties of NaI prevent the direct deposition of a TES on it’s surface. In order to overcome this, a new prototype detector design dubbed remoTES has been developed. It utilizes a gold pad coupled to the absorber crystal as the primary interface to transmit the phonon signal to the TES, which is fabricated on a separate wafer substrate. The first preliminary results from above ground R&D measurements are reported in this talk.