Speaker
Emanuele Angelino
Description
The XENONnT Neutron Veto is a Gd-loaded water Cherenkov detector designed to reduce radiogenic neutron background in the XENONnT dark matter search. Initially operating with demineralized water, Gd was introduced using a dedicated system for recirculation and purification of the Gd-loaded water. Details of the Gd insertion process and the first results from an AmBe neutron calibration are presented. Due to the large cross-section of Gd for thermal neutron capture, the detector performance has improved, resulting in a reduction in neutron background by a factor of 2, compared to the first scientific runs.
