The nEXO detector: design overview

This report presents an overview of the design solutions adopted for the nEXO detector, a large enriched-liquid-xenon time projection chamber to search for the neutrinoless double beta decay (0v DBD) of ¹³⁶Xe. The nEXO concept is inherited from EXO-200, the first 100-kg scale DBD experiment to produce physics results, which ran between 2010 and 2018 at the WIPP underground site in New Mexico. Important novel solutions were introduced for nEXO that ease some aspects of the scale-up and, most importantly, allow nEXO to achieve a > 100-fold higher sensitivity to 0v DBD than its predecessor.