Speaker
Keyu Ding
(University of South Dakota)
Description
The light yield of a small undoped CsI crystal directly coupled with two SiPMs at about 77~Kelvin was measured to be $42.8 \pm 1.1$~photoelectrons (PE) per keV electron-equivalent (keVee) using $X$ and $\gamma$-ray peaks from an $^{241}$Am radioactive source. The operation of an undoped CsI crystal coupled with two SiPMs at 77~K was the first attempt in the world. The high light yield together with some other technical advantages makes it a great neutrino and dark matter detector, particularly at the Spallation Neutron Source, Oak Ridge National Laboratory.
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