Speaker
Description
CUPID (CUORE Upgrade with Particle IDentification) is a next-generation experiment planning to search for the
neutrinoless double-beta decay with bolometric detectors, featuring 250 kg of $^{100}$Mo. The detector will be operated
in a custom cryostat at the Gran Sasso National Laboratory (Italy), which is currently hosting the
CUORE experiment, a large array of TeO$^{2}$ bolometers. CUPID will exploit scintillating bolometers consisting
of Li$_2^{100}$MoO$_4$ crystals facing thin Ge-wafer-based bolometric light detectors. The light detectors will allow for
full discrimination of the alpha background. Since the various background contributions can limit the experiment's sensitivity, all the components are being carefully investigated and benchmarked in view of the CUPID design.
A critical contribution to the CUPID background comes from the pile-up of two-neutrino-double-beta-decay
events of $^{100}$Mo. This can be mitigated by the use of enhanced light detectors based on the Neganov-Luke-Trofimov
(NTL) effect, which provide fast signals and a high signal-to-noise ratio. A demonstrator with 10 Ge NTL light detectors
has been measured in an underground cryogenic facility in Canfranc (Spain). The light detectors have been
characterized in terms of sensitivity, energy resolution, and noise power spectrum. This test
allows us to evaluate the feasibility of employing NTL LDs in the CUPID experiment and to assess the sensitivity
reach of CUPID with the enhanced light channels.
| Submitted on behalf of a Collaboration? | Yes |
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