The DarkSide Multiton Detector for the Direct Dark Matter Search
A summary of the expected nuclear and electron recoil backgrounds depositing 55–240 in an 18-ton-year exposure of DarkSide-G2. We assume 39Ar at our recently measured limit . For PMTs, we use the expected background in the R11065-G2s based on measurements reported by Hamamatsu and our ongoing R&D. For the cryostat, we use detailed measurements of the steel used for the DarkSide-50 cryostat. After cuts include fiducial, energy, and multihit cuts.