SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 69: Neutrinos, Dark Matter IX

T 69.4: Vortrag

Mittwoch, 22. März 2023, 16:35–16:50, POT/0112

Improved detector response modelling for single-charge sensitive SuperCDMS detectors — •Matthew Wilson and Alexander Zaytsev for the SuperCDMS collaboration — Karlsruhe Institute of Technology, Institute for Astroparticle Physics

Recently, R&D facilities within the SuperCDMS collaboration have developed and employed cryogenic, high-voltage, eV-scale (HVeV) detectors with single-charge sensitivity. For a typical event observed by one of these gram-sized, silicon crystal detectors, the total amount of phonon energy measured is proportional to the number of electron-hole pairs created by the interaction. However, crystal imperfections and surface effects can cause propagating charges to either trap inside the crystal or ionize additional charges, producing non-quantized measured energy as a result. Modelling these detector-response effects continues to be important for the HVeV R&D program in order to understand calibration data and apply these effects on potential signals for dark matter searches. This presentation showcases an improved, more robust model of these detector-response effects that has fewer limitations and is capable of modelling more effects compared to previous models. This model allows for more accurate characterization of HVeV detectors and may facilitate discrimination between potential dark matter signals and background sources.