SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 15: Neutrinos, Dark Matter III
T 15.2: Vortrag
Montag, 20. März 2023, 16:45–17:00, POT/0006
DELight: Direct Search Experiment for Light Dark Matter with Superfluid Helium — •Francesco Toschi1, Klaus Eitel1, Christian Enss1,2, Torben Ferber1, Loredana Gastaldo2, Felix Kahlhoefer1, Sebastian Kempf1, Greta Heine1, Markus Klute1, Sebastian Lindemann3, Marc Schumann3, Kathrin Valerius1, and Belina von Krosigk1 — 1Karlsruhe Institute of Technology — 2Heidelberg University — 3University of Freiburg
The DM-nucleon scattering parameter space of Light Dark Matter (LDM) has been barely experimentally probed, as it requires an energy detection threshold down to a few tens of eV. The “Direct search Experiment for Light dark matter” (DELight) aims at using superfluid helium-4 as target, particularly suited because of its low nuclear mass and radiopurity, while providing both photon and quasiparticle signal channels valuable for event classification. DELight will deploy Magnetic Micro-Calorimeters (MMCs) operating at a temperature of 20 mK, promising high resolution and a threshold of a few eV. With an exposure of only 1 kg×d and an energy threshold of 20 eV, in its first phase DELight will be able to probe unexplored regions of the parameter space for LDM masses below 100 MeV with an expected sensitivity lower than 10−39 cm2 at 20 MeV.
In this talk we will present the working principle of the detector technologies as well as an overview of the ongoing R&D towards the realization of DELight.