The Cryogenic Dark Matter Search and Carrier Transport in 40 MilliKelvin Germanium $<100>$

The Cryogenic Dark Matter Search (CDMS) is searching for Weakly Interacting Massive Particles (WIMPs) via their interactions in Ge and Si detectors at a temperature of $40 ~mK$. Measuring the ionized charge and non-thermalized phonons from particle interactions enables CDMS to discriminate candidate WIMP interactions from electromagnetic background. Operation at such low temperature represents a unique regime for electron and hole transport processes. As these carriers are always hot, typical assumptions of thermal equilibrium are no longer valid. We have simulated transport processes of charge carriers in germanium $<100>$ at a temperature of $40 ~mK$. We will present how this new understanding is beneficial to future detector development.