EXCESS24

ELOISE – Comparing Geant4 simulations at sub-keV against electron energy loss spectroscopy of CaWO$_4$ and Al$_2$O$_3$

Not scheduled

20m

Amaldi Room (Physics Department - Edificio Marconi)

Speaker

Holger Kluck (Institute of High Energy Physics (HEPHY) of the Austrian Academy of Sciences)

Description

CaWO$_4$ and Al$_2$O$_3$ are well-known target materials for experiments searching for rare events like CE$\nu$NS with NUCLEUS or hypothetical dark matter-nucleus scattering with CRESST. In the presence of sub-keV backgrounds of unknown origin, like the Low Energy Excess, experiments are also in need for verified and reliable simulations of known background components at sub-keV energies, e.g. based on the widely used Geant4 toolkit.
The ELOISE project aims to tackle this issue for electromagnetic particle interactions in both materials. We are currently in the process of evaluating Geant4’s accuracy by comparing benchmark simulations with dedicated Electron Energy Loss Spectroscopy (EELS) of CaWO$_4$ and Al$_2$O$_3$ at sub-keV energies.
In this contribution, I will briefly describe the problem and outline the scope of ELOISE. Afterwards, I will report the results of ELOISE’s EELS measurements. Finally, I will discuss our preliminary comparison with Geant4 simulations of CaWO$_4$ and Al$_2$O$_3$ at sub-keV energies.