Signal and noise simulation of CUORE bolometric detectors

TL;DR

This paper introduces a software simulation tool for CUORE bolometric detectors, modeling signal and noise characteristics, including temperature effects, nonlinearities, and pileups, to improve understanding of detector performance.

Contribution

The work presents a novel software tool that accurately simulates CUORE bolometer signals and noise, accounting for temperature variations and nonlinearities, validated against experimental data.

Findings

Simulations match experimental data well

Tool captures effects of temperature drifts and pileups

Improves understanding of detector energy resolution

Abstract

Bolometric detectors are used in particle physics experiments to search for rare processes, such as neutrinoless double beta decay and dark matter interactions. By operating at cryogenic temperatures, they are able to detect particle energies from a few keV up to several MeV, measuring the temperature rise produced by the energy released. This work focusses on the bolometers of the CUORE experiment, which are made of TeO$_2$ crystals. The response of these detectors is nonlinear with energy and changes with the operating temperature. The noise depends on the working conditions and significantly affects the energy resolution and the detection performances at low energies. We present a software tool to simulate signal and noise of CUORE-like bolometers, including effects generated by operating temperature drifts, nonlinearities and pileups. The simulations agree well with data.