Background Control for nEXO – a Neutrinoless Double Beta Decay Experiment

nEXO is a tonne-scale neutrinoless double beta decay (0νββ) search experiment. It searches for 0νββ of ¹³⁶Xe using a liquid Xe time projection chamber (TPC). It is projected to reach a half-life sensitivity of about 10²⁸ years with 10 years of exposure time. To achieve this unprecedented sensitivity, stringent limits on radioactivity are necessary to control backgrounds to a sufficiently low level. Detector construction materials contribute most to the background budget in the form of intrinsic radioactivity and outgassed radon. Material storage and handling also contribute through cosmogenic activation, radon daughter plateout, and dust deposition. This talk will discuss our current plans on the estimation, measurement, and mitigation of backgrounds that affect nEXO.