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T: Fachverband Teilchenphysik
T 16: Search for Dark Matter I
T 16.7: Vortrag
Montag, 16. März 2026, 17:45–18:00, AM 00.014
Simulating DELight: the simulation framework of the DELight experiment — •Francesco Toschi for the DELight collaboration — Kirchhoff-Institut für Physik, Heidelberg University
The strong experimental constraints on well-motivated dark matter candidates for masses above 1 GeV/c2 motivates the exploration of lighter alternative candidates. Probing the low-mass regime requires ultra-low energy thresholds: these are already achieved by solid-state cryogenic detectors thanks to their phonon signal and ultra-sensitive sensors. Combining this approach of ultra-low energy phonon detection with much lighter target nuclei will further enhance the low mass reach. The Direct search Experiment for Light dark matter (DELight) will use a superfluid helium-4 target instrumented with large area microcalorimeters (LAMCALs), combining the low threshold of phonon-based detection with the scalability of noble liquids. This allows DELight to explore masses below 100 MeV/c2 with just 1 kg·d of exposure.
DELight is in its design phase, and detailed simulations play a central role in informing the design and construction of the final detector. This talk will present the DELight simulation framework, including the signal formation and propagation within the superfluid volume, as well as models of the relevant background sources.
Keywords: Superfluid helium; Light dark matter; Simulation; Cryogenic detectors; Phonon