Speaker
Description
Precision measurements of angular correlations and energy distributions in neutron beta decay are sensitive to new physics. Currently some angular correlations require measurement of the decay proton and electron in dedicated detectors, reducing the achievable acceptance. Charged Particle Thermal Kinetic Inductance Detectors (CP-TKIDs) are cryogenic detectors that can be naturally multiplexed and could reach an energy resolution as low as 200 eV at 1 MeV for a 1 cm x 1 cm x 2 mm pixel. A stack of two CP-TKIDs, one with a ~10 $\mu$m thick absorber and the other with a 1.8 mm thick absorber, could discriminate between protons and electrons, and a m$^2$ surface area array with 10$^4$ pixels could be readout on as few as 10 readout lines. This would facilitate large increases in acceptance along with hundreds of times increased angular granularity at an order of magnitude improved energy resolution. We present the ongoing prototyping and testing of the detector technology and the initial design work for a full-scale next-generation experiment.
