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Investigation of background electron emission in the LUX detector

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arxiv 2004.07791 v2 pith:CWJY2OYX submitted 2020-04-16 physics.ins-det

D. S. Akerib , S. Alsum , H. M. Araújo , X. Bai , J. Balajthy , A. Baxter , E. P. Bernard , A. Bernstein
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T. P. Biesiadzinski E. M. Boulton B. Boxer P. Brás S. Burdin D. Byram M. C. Carmona-Benitez C. Chan J. E. Cutter L. de Viveiros E. Druszkiewicz A. Fan S. Fiorucci R. J. Gaitskell C. Ghag M. G. D. Gilchriese C. Gwilliam C. R. Hall S. J. Haselschwardt S. A. Hertel D. P. Hogan M. Horn D. Q. Huang C. M. Ignarra R. G. Jacobsen O. Jahangir W. Ji K. Kamdin K. Kazkaz D. Khaitan E. V. Korolkova S. Kravitz V. A. Kudryavtsev E. Leason B. G. Lenardo K. T. Lesko J. Liao J. Lin A. Lindote M. I. Lopes A. Manalaysay R. L. Mannino N. Marangou D. N. McKinsey D. M. Mei M. Moongweluwan J. A. Morad A. St. J. Murphy A. Naylor C. Nehrkorn H. N. Nelson F. Neves A. Nilima K. C. Oliver-Mallory K. J. Palladino E. K. Pease Q. Riffard G. R. C. Rischbieter C. Rhyne P. Rossiter S. Shaw T. A. Shutt C. Silva M. Solmaz V. N. Solovov P. Sorensen T. J. Sumner M. Szydagis D. J. Taylor R. Taylor W. C. Taylor B. P. Tennyson P. A. Terman D. R. Tiedt W. H. To L. Tvrznikova U. Utku S. Uvarov A. Vacheret V. Velan R. C. Webb J. T. White T. J. Whitis M. S. Witherell F. L. H. Wolfs D. Woodward J. Xu C. Zhang
This is my paper · ORCID
classification physics.ins-det
keywords electronemissionbackgrounddarkdetectormatterdifferentelectrons
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Dual-phase xenon detectors, as currently used in direct detection dark matter experiments, have observed elevated rates of background electron events in the low energy region. While this background negatively impacts detector performance in various ways, its origins have only been partially studied. In this paper we report a systematic investigation of the electron pathologies observed in the LUX dark matter experiment. We characterize different electron populations based on their emission intensities and their correlations with preceding energy depositions in the detector. By studying the background under different experimental conditions, we identified the leading emission mechanisms, including photoionization and the photoelectric effect induced by the xenon luminescence, delayed emission of electrons trapped under the liquid surface, capture and release of drifting electrons by impurities, and grid electron emission. We discuss how these backgrounds can be mitigated in LUX and future xenon-based dark matter experiments.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quartz fluorescence backgrounds in xenon particle detectors

    hep-ex 2025-05 conditional novelty 7.0 of 10

    The delayed photon noise that follows scintillation pulses in liquid xenon detectors is mostly ultraviolet-induced fluorescence from quartz photosensor windows, not from the xenon or the detector walls.

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    hep-ex 2026-01 conditional novelty 6.0 of 10

    An S2-only analysis of 7.83 tonne-years of XENONnT data finds no dark matter excess and sets 90% CL limits, e.g. 6.0e-45 cm^2 for spin-independent scattering at 5 GeV/c^2.

  3. First constraints on the coherent elastic scattering of reactor antineutrinos off xenon nuclei

    hep-ex 2024-11 accept novelty 6.0 of 10

    The RED-100 experiment sets the first constraints on reactor antineutrino coherent scattering off xenon nuclei, with 90% C.L. upper limits 60 to 90 times the Standard Model expectation.

  4. Search for Light Dark Matter in Low-Energy Ionization Signals from XENONnT

    hep-ex 2024-11 accept novelty 6.0 of 10

    XENONnT's first science run excludes new parameter space for sub-keV bosonic dark matter absorption and 10-20 MeV/c^2 dark matter-electron scattering, setting the strongest direct-detection limits for these channels.

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