Akash Dixit Rose Hills
Charge Transport in mK Ge and Si Detectors for the Cryogenic Dark Matter Search
Dark matter is ubiquitous in this universe yet has not been detected directly. The leading candidate particles for dark matter are Weakly Interacting Massive Particles (WIMPs). The Cryogenic Dark Matter Search utilizes measurement of ionization and phonons in order to discriminate between background particles and rare WIMP interactions. Achieving complete charge collection by the ionization readout is challenging due to trapping within the low temperature Germanium and Silicon detectors. The charge transport experiment will provide great insight into the phenomenon of charge trapping and this information will have wide implications in low temperature semiconductor physics. Examining the trapping curves will also allow us to better understand the charge collection mechanism for the CDMS detectors. With this information we can more accurately distinguish between background particles and rare WIMP interactions, eventually leading to the detection of dark matter.