Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 103: Search for Dark Matter IV
T 103.4: Vortrag
Freitag, 20. März 2026, 09:45–10:00, AM 00.014
Status of large-area cryogenic microcalorimeter (LAMCAL) development for DELight — •Lena Hauswald1, Christian Jeup1, Friedrich Wagner1, and Sebastian Kempf1,2 — 1Institute of Micro- and Nanoelectronic Systems, Karlsruhe Institute of Technology (KIT), Germany. — 2Institute for Data Processing and Electronics, Karlsruhe Institute of Technology (KIT), Germany.
The Direct Search Experiment for Light Dark Matter (DELight) is a pioneering initiative aimed at probing light dark matter (LDM). By utilizing superfluid 4He as target material, DELight will enable the exploration of weakly interacting DM candidates with masses notably below 100 MeV/c2. To achieve the required detector sensitivity for resolving the various signal channels of the superfluid, both in terms of time and energy resolution, DELight focuses on the development of large-area cryogenic microcalorimeters (LAMCALs) based on magnetic microcalorimeter (MMC) technology.
In contrast to state-of-the-art MMCs, each LAMCAL will be operated as athermal phonon detector. Here, the energy of athermal phonons generated by a energy deposit and propagating ballistically within the absorber is converted into a temperature rise of the paramagnetic temperature sensor via Al-based superconducting phonon collectors. Consequently, the signal rise time is governed by the phonon collection time, while the absorber heat capacity becomes negligible to first order, enabling excellent energy resolution. This contribution presents the current status of LAMCAL development for DELight, highlighting their potential and the challenges encountered to date.
Keywords: Dark matter detector; Large-area microcalorimeter; Low temperature detector