Optimization of integration time and distance cut in the CUPID array.

CUPID, a proposed next-generation neutrinoless double beta decay search, will deploy an array of approximately ~1,500 Li₂MoO₄ crystals (isotopically enriched in ¹⁰⁰Mo) operated as cryogenic calorimeters in the CUORE cryostat. The experiment aims for a background index of 10^-4 counts/(keV*kg*yr) and half-life sensitivity of 0νββ decay of 1.4*10²⁷ yr with 10 years of livetime. The scintillation and thermal signals from the crystals together allow for discrimination of α and β/γ events resulting in rejection of α-induced backgrounds while maintaining a high efficiency of ββ signals. Furthermore, the highly segmented crystal array allows differences in spatial and time signatures of background-like and signal-like events to be exploited to further reduce backgrounds. In this talk, we will discuss development and validation of Monte-Carlo simulation tools to model spatial and temporal correlation of events in the array and their connection to optimizing background tagging.