DELight: a Direct search Experiment for Light dark matter with superfluid helium
Belina von Krosigk, Klaus Eitel, Christian Enss, Torben Ferber, Loredana Gastaldo, Felix Kahlhoefer, Sebastian Kempf, Markus Klute, Sebastian Lindemann, Marc Schumann, Francesco Toschi, Kathrin Valerius

TL;DR
The paper introduces DELight, a novel experiment using superfluid helium and magnetic micro-calorimeters to detect ultra-light dark matter particles below 100 MeV, aiming to explore uncharted parameter space.
Contribution
DELight is the first experiment to combine superfluid helium with magnetic micro-calorimeters for light dark matter detection at sub-100 MeV masses.
Findings
Design of DELight targeting sub-100 MeV dark matter
Potential to explore new parameter space in light dark matter
Innovative use of superfluid helium as active target
Abstract
To reach ultra-low detection thresholds necessary to probe unprecedentedly low Dark Matter masses, target material alternatives and novel detector designs are essential. One such target material is superfluid He which has the potential to probe so far uncharted light Dark Matter parameter space at sub-GeV masses. The new ``Direct search Experiment for Light dark matter'', DELight, will be using superfluid helium as active target, instrumented with magnetic micro-calorimeters. It is being designed to reach sensitivity to masses well below 100\,MeV in Dark Matter-nucleus scattering interactions.
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Atomic and Subatomic Physics Research · Quantum, superfluid, helium dynamics
