Low Radioactivity Techniques (LRT2022)

The background rejection capabilities of highly-pixelated solid-state detectors

Jun 17, 2022, 2:15 PM

15m

EEP 252 (South Dakota Mines)

Oral Presentation Experiment Backgrounds, Models, Simulations LRT 2022 - presentations

Speaker

Prof. Alvaro Chavarria (University of Washington)

Description

Highly-pixelated solid-state detectors offer outstanding capabilities in the identification and rejection of backgrounds from natural radioactivity. I will present the background identification techniques developed for the DAMIC experiment, which employs silicon CCDs to search for dark matter. DAMIC has demonstrated the capability to disentangle and measure the activities of every $\beta$ emitter from the ${}^{32}$Si, ${}^{238}$U and ${}^{232}$Th chains in the silicon target. Similar techniques will be adopted by the Selena Neutrino Experiment, which will employ hybrid amorphous ${}^{82}$Se/CMOS imagers to perform spectroscopy of $\beta \beta$ decay and solar neutrinos. I will present the proposed experimental strategy for Selena to achieve zero-background in a 100 ton-year exposure.

Presentation materials

Chavarria_LRT_2022.pdf

Peer reviewing

Paper

Accepted on Dec 9, 2022 by Richard Schnee

Background_Rejection_in_Highly_Pixelated_Solid_State_Detectors.pdf