Measurement of the Drift Velocity and Transverse Diffusion of Electrons in Liquid Xenon with the EXO-200 Detector

Abstract

The EXO-200 Collaboration is searching for neutrinoless double beta decay using a liquid xenon (LXe) time projection chamber. This measurement relies on modeling the transport of charge deposits produced by interactions in the LXe to allow discrimination between signal and background events. Here we present measurements of 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${}_{-0.010}^{+0.014}$~mm/$\mu$s and a transverse diffusion coefficient of 55$\pm$4~cm${}^2$/s.

9 pages, 7 figures, added minor clarifications recommended by the reviewer on E-field non-uniformities, minor edits to formatting of figures to conform with journal requirements

Cited by in corpus (18)

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• Characterization of alpha and beta interactions in liquid xenon
• Design and construction of Xenoscope -- a full-scale vertical demonstrator for the DARWIN observatory
• Prospects of charge signal analyses in liquid xenon TPCs with proportional scintillation in the liquid phase
• Design and performance of the field cage for the XENONnT experiment
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• Search for Two-neutrino Double-Beta Decay of ${}^{136}\mathrm{Xe}$ to the $0_1^{+}$ excited state of ${}^{136}\mathrm{Ba}$ with the Complete EXO-200 Dataset
• Development of a Monte Carlo tool for simulating electron transport in noble liquids
• Feasibility of Liquid-phase Xenon Proportional Scintillation for Low-energy Physics
• Design Challenges for a Future Liquid Xenon Observatory
• Design and production of the high voltage electrode grids and electron extraction region for the LZ dual-phase xenon time projection chamber
• A Comprehensive Monte Carlo Simulation Tool on Electron Transport in Noble Gases and Liquids
• A flexible test facility for liquid xenon detector development