Characterization of Neutron Transmutation Doped Germanium Thermistors for the CUPID Experiment
POSTER
Abstract
The CUPID (CUORE Upgrade with Particle IDentification) experiment is a next-generation search for neutrinoless double-beta decay (0νββ) using Li₂MoO₄ scintillating bolometers enriched in 100Mo, planned to operate at ≈10 mK in the existing CUORE cryostat at the INFN Gran Sasso National Laboratory. Observation of 0νββ would demonstrate the Majorana nature of neutrinos, violation of lepton number, and signal new physics beyond the Standard Model.
Each CUPID detector employs a Neutron Transmutation Doped (NTD) germanium thermistor as an ultrasensitive thermometer converting phonon energy into measurable resistance changes.
In this poster we present testing and characterization data of prototype NTD thermistors carried out in the temperature range between 10 and 100 mK in an R&D dilution refrigerator at Virginia Tech and report on interpretation of the data with Mott’s variable-range hopping model.
Each CUPID detector employs a Neutron Transmutation Doped (NTD) germanium thermistor as an ultrasensitive thermometer converting phonon energy into measurable resistance changes.
In this poster we present testing and characterization data of prototype NTD thermistors carried out in the temperature range between 10 and 100 mK in an R&D dilution refrigerator at Virginia Tech and report on interpretation of the data with Mott’s variable-range hopping model.
*This work is supported by the Department of Energy Office of Science under Award No. DE-SC0020423
Presenters
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Chaturanga Wengappuliarachchige
- Virginia Tech