Speaker
Description
BULLKID is an R&D project which investigates a way of increasing the active volume of cryogenic detectors.
Several cubic silicon absorbers are carved in a 5 mm thick 3-inch diameter wafer. An array of multiplexed Kinetic Inductance Detectors (KIDs) senses the cubes with one KID per cube. When a particle interacts in the silicon it produces phonons which are then detected by the KID. The advantage of using KIDs lies in their natural multiplexing capability which is crucial to scale the technology up to hundreds or thousands of sensors.
The first prototype built consists of 60 cubes, with a measured energy resolution of around 100 eV_nr. The response across the array is however not uniform and further refinements of the technology are ongoing.
Further improving the energy resolution is being evaluated as the next step in the R&D and might prove crucial in detecting Coherent elastic neutrino-nucleus scattering (CEvNS) or sub-GeV Dark Matter. If successful several wafers will be produced and stacked to reach the target mass.
In this poster we will describe the BULLKID project and the results from the operation of the first prototype.
