Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 69: Search for Dark Matter 3
T 69.6: Vortrag
Mittwoch, 6. März 2024, 17:15–17:30, Geb. 30.35: HSI
ELOISE - Electronic stopping power in CaWO4 and Al2O3 for background simulations — •Holger Kluck1, Jens Burkhart1, and Michael Stoeger-Pollach2 — 1Institut für Hochenergiephysik der Österreichischen Akademie der Wissenschaften, 1050 Wien, Österreich — 2Technische Universität Wien, University Servicecentre for TEM, 1040 Wien, Österreich
CaWO4 and Al2O3 are well-known target materials for experiments searching for rare events like CEνNS with NUCLEUS or hypothetical dark matter-nucleus scattering with CRESST. Pushing the detection threshold down to sub-keV energies, experiments require verified and reliable simulations of radioactive background components at sub-keV energies, such as those based on the widely used Geant4 toolkit.
The ELOISE project aims to tackle this issue for electromagnetic particle interactions in both materials. Currently, we are preparing an evaluation of Geant4’s current accuracy by conducting benchmark simulations and comparing them with data from extended literature research and dedicated measurements. As sub-keV data on the electronic stopping power is rare or totally missing, ELOISE conducted dedicated measurements for CaWO4 and Al2O3. Currently, we are deducing electronic stopping powers from our measurements.
In this contribution, I will shortly motivate the problem and outline the scope of ELOISE. Afterwards, I will report the results of ELOISE’s reference measurements. Finally, I will discuss our preliminary findings for the electronic stopping power in CaWO4 and Al2O3 at sub-keV energies.
Keywords: Radioactive background; Geant4 simulation; Electronic stopping power; Low energy nuclear recoils