Speaker
Description
CUPID is a proposed next-generation experiment that will search for neutrinoless double-β (0νββ) decay in $^{100}$Mo using ~1600 Li$_2$$^{100}$MoO$_4$ scintillating crystals operated as low-temperature calorimeters close to ∼10mK. It will leverage the crystal’s energy loss mechanism to tag particle type by simultaneously measuring the thermal and scintillation signals. We will use an auxiliary low-temperature calorimeter to detect light with high photon collection efficiency. The light detectors must have a very low energy threshold 𝒪(100eV) and good timing resolution < 1 ms to tag α background and 2νββ pile-up events in the region of interest, and are crucial to reach the CUPID background goal of <1E-4 counts/(keV.kg.yr) for its baseline design. In this talk, I will briefly discuss the R&D status of a future upgrade using a novel Iridium/Platinum bilayer superconducting transition-edge-sensor (TES) on a large area dielectric wafer (Si/Ge), acting as light-detectors. CUPID is under development at the 250 kg level but is already looking to the next stage with 1 ton of $^{100}$Mo (CUPID-1T). Scaling the next generation of crystalline detectors to the ton size requires ten thousand channels or more; efforts to decrease this wire density using frequency-division multiplexing are ongoing. These efforts still require technical solutions to demonstrate performance at operating temperature; systems must also adhere to stringent noise, crosstalk, and radiopurity constraints. I will discuss our efforts toward these technical solutions.
| Early Career | Yes |
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