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CryoCsI, the proposed prototype, is a cryogenic undoped CsI scintillating detector, which has a much lower energy threshold potentially down to 0.5 keV$_{nr}$ compared to the doped CsI. This enhanced sensitivity of CryoCsI allows for the observation of more Coherent elastic neutrino-nucleus scattering events. Precise measurements of CEvNS can not only validate the predictions of the Standard Model but also explore new physics. In conjunction with other COHERENT detectors, CryoCsI has the potential to achieve world-leading sensitivities in a broad range of physics topics within and beyond the SM. The sensitivities of CryoCsI to hidden-sector dark matter, non-standard neutrino interactions, and neutron radius are explored. This thesis delves into the construction of CryoCsI and efforts to enhance its light yield from 20 to $50 \pm 2$ photoelectrons per keV electron-equivalent (keV$_{ee}$). It will address challenges with cryogenic SiPMs, including inferior energy resolution, optical cross-talk, and potential limitations on detecting rare events. Understanding the light yield of scintillating detectors for nuclear recoils is crucial, as explored through alpha-particle and neutron quen

Author

Ding, Keyu

Published

2024

Language

EN