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CryoCsI crystal shape optimization based on optical simulations

ORAL

Abstract

COHERENT collaboration is the first that observed Coherent elastic neutrino-nucleus scatter (CEvNS) events in 2017. A 14.6 kg doped CsI at room temperature was placed 20 meters away from the 1.4 MW Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory (ORNL). The SNS pulsed proton beam provides a uniquely high background rejection and high-intensity neutrinos. CryoCsI is a cryogenic undoped CsI scintillating detector, which has a much lower energy threshold potentially down to 0.5 keVnr. Working with other COHERENT detectors, CryoCsI can produce world-leading sensitivities on broad physics topics in and beyond the Standard Model. In this talk, I'll present optical simulation studies on optimizing the shape of a ~10 kg CryoCsI crystal.

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Publication: Dmitry Chernyak, Daniel Pershey, Jing Liu, Keyu Ding, Nathan Saunders, and Tupendra Oli, Prospect of undoped inorganic crystals at 77 Kelvin for low-mass dark matter search at Spallation Neutron Source, Eur. Phys. J. C, 80(6):547 (2020).<br>Keyu Ding, Dmitry Chernyak, and Jing Liu, Light yield of cold undoped CsI crystal down to 13 keV and the application of such crystals in neutrino detection, Eur. Phys. J. C, 80(12):1146, 2020.<br>Keyu Ding, Jing Liu, Yongjin Yang, and Dmitry Chernyak, First operation of undoped CsI directly coupled with SiPMs at 77 Kelvin, Eur. Phys. J. C, 82(4):344, 2022.<br>Keyu Ding, Jing Liu, Yongjin Yang, Kate Scholberg, Daine M Markoff, Performance of a liquid nitrogen cryostat for the study of nuclear recoils in undoped CsI crystals, arXiv preprint, arXiv:2303.05437.<br>COHERENT Collaboration, Accessing new physics with an undoped, cryogenic CsI CEvNS detector for COHERENT at the SNS, arXiv preprint, arXiv:2311.13032.

Presenters

  • Keyu Ding

    University of South Dakota

Authors

  • Keyu Ding

    University of South Dakota

  • Jing Liu

    University of South Dakota