Electron drift velocity and transverse diffusion measurements in liquid Xe with EXO-200:
EXO-200 is using a liquid xenon (LXe) time projection chamber to search for 0nbb. This measurement relies on modeling the transport of charge deposits produced by interactions in the LXe to allow discrimination between signal and background events. As reported in Physical Review C (2017), by varying the electric field of the EXO-200 TPC, we measured the transverse diffusion constant and drift velocity of electrons at drift fields between 20 V/cm and 615 V/cm using EXO-200 data. At the operating field of 380 V/cm EXO-200 measures a drift velocity of 1.705+0.014−0.010mm/μs and a transverse diffusion coefficient of 55±4cm2/s. This measurement provide information for liquid xenon dark matter detectors such as LZ and XENON, as well as for the future nEXO detector.