Ge Detectors for LEGEND-200*

The Large Enriched Germanium Experiment for Neutrinoless double-beta Decay (LEGEND) is pursuing a phased approach to develop a ton-scale experiment searching for neutrinoless double-beta decay (0nbb) in ⁷⁶Ge. The experiment builds on the successes of two previous 0nbb experiments, the MAJORANA DEMONSTRATOR and the GERDA experiment. The first phase, LEGEND-200, will deploy ~200-kg of ⁷⁶Ge detectors enriched to >86%. 60-kg will be reused from GERDA and MAJORANA detectors. 140-kg of new detectors will be fabricated in the novel Inverted Coaxial Point Contact (ICPC) geometry developed to increase the mass of the detectors without sacrificing their excellent pulse shape discrimination (PSD) capabilities or energy resolution. LEGEND plans to begin commissioning and data-taking in late 2021. Before the detectors can be deployed, they need to be fully characterized. These tests include using a  ²²⁸Th source to measure each detector’s efficiency, energy resolution, and timing response as well as additional radial and longitudinal scans with ²⁴¹Am and ¹³³Ba sources to determine the dead-layer. A description of the characterization program and the performance of the ICPC detectors will be presented.