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Liquid-phase purification for multi-tonne xenon detectors

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arxiv 2205.07336 v2 pith:7YUWKW2H submitted 2022-05-15 physics.ins-det

G. Plante , E. Aprile , J. Howlett , Y. Zhang This is my paper · ORCID
classification physics.ins-det
keywords liquidxenonpurificationdetectorsmassmeasuredpurityremoval
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As liquid xenon detectors grow in scale, novel techniques are required to maintain sufficient purity for charges to survive across longer drifts. The Xeclipse test facility at Columbia University was built to test the removal of electronegative impurities through cryogenic filtration powered by a liquid xenon pump, enabling a far higher mass flow rate than gas-phase purification through heated getters. In this paper, we present results from Xeclipse, including measured oxygen removal rates for two sorbent materials, which were used to guide the design and commissioning of the XENONnT liquid purification system. Thanks to this innovation, XENONnT has achieved an electron lifetime greater than 10 ms in an 8.6 tonne total mass, perhaps the highest purity ever measured in a liquid xenon detector.

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Cited by 2 Pith papers

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

  1. Light Dark Matter Search with 7.8 Tonne-Year of Ionization-Only Data in XENONnT

    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.

  2. Radon Removal in XENONnT down to the Solar Neutrino Level

    physics.ins-det 2025-02 conditional novelty 5.0 of 10

    XENONnT reduced radon-222 in its liquid xenon target to 0.90 ± 0.07 micro-becquerel per kilogram, the lowest level reported for an operational dual-phase dark matter detector, matching the solar neutrino background.

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