Speaker
Description
Modeling phonon-mediated signals in solid state detectors with TES readout requires connecting crystal phonon transport to the electrothermal response of the sensor. This talk presents a framework coupling G4CMP to a TES electrothermal simulation for pulse shape modeling and tuning against SuperCDMS HVeV detector data, with successful reproduction of LED calibration spectra. A key outcome is the identification of parameter degeneracies between G4CMP crystal parameters and TES readout parameters that affect distinct features of the pulse shape. These degeneracies are intrinsic to the detector physics and cannot be resolved by tuning the two subsystems independently. We discuss future extensions of the MCMC inference framework to incorporate an analytical description of the phonon arrival time distribution, exploring whether G4CMP can be used to inform such a parameterization, as a step toward joint crystal and TES parameter inference.
