Abstract
CUORE is a cryogenic detector that will be operated at LNGS to search for neutrinoless double beta decay (0νββ) of 130Te. The detector installation was completed in summer 2016. Before the installation, several cold runs were done to test the cryogenic system performance. In the last cold run the base temperature of 6.3 mK was reached in stable condition. CUORE-0, a CUORE prototype, has proven the feasibility of CUORE, demonstrating that the target background of 0.01 counts/keV/kg/y and the energy resolution of 5 keV are within reach.
Highlights
TeO2 bolometerA bolometer is a low temperature detector in which the energy released into the crystal is converted in thermal phonons
- The low energy spectrum of TeO2 bolometers: results and dark matter perspectives for the CUORE-0 and CUORE experiments F
: CUORE is a cryogenic detector that will be operated at LNGS to search for neutrinoless double beta decay (0ν β β) of 130Te
Summary
A bolometer is a low temperature detector in which the energy released into the crystal is converted in thermal phonons. A bolometer consists in three principal parts: a diamagnetic and dielectric crystal as energy absorber, a thermistor that converts the thermal signal into an electrical one, and a thermal link between the crystal and the heat bath. G is the thermal conductance between crystal and heat bath (see figure 2a). The basic elemenent of the CUORE bolometer is a TeO2 crystal equipped with a NTD-Ge sensor and a silicon heater (see figure 2b). Since the thermal detectors are sensitive to temperature drift, which would spoil their intrinsic energy resolution, the heater is used to correct the signal for this problem during initial stage of data analysis. The heater periodically injects a fixed-energy pulse into each crystal to emulate particle interaction and bolometer response
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