Speaker
Description
The nEXO experiment will search for neutrinoless double beta decay (0νββ) using a 5-tonne liquid xenon time projection chamber filled with xenon enriched to 90% in Xe-136.The experiment has a projected half-life sensitivity beyond 10^28 years for a 10 year data taking. Observation of 0νββ would demonstrate lepton number violation and confirm the Majorana nature of neutrinos. This talk presents an overview of nEXO and recent R&D efforts at Stanford. We report LXe tests of prototype cryogenic ASICs for ionization charge readout and progress on a SiPM array with external electronics. We also describe a 64-kg LXe TPC under construction to host four charge readout modules, enabling studies of inter-tile cross-talk and energy resolution. These prototypes inform key design choices for nEXO, aiming to optimize signal readout, suppress noise, and enhance sensitivity to 0νββ.
