Abstract

Measurements of the properties of proportional scintillation light emitted in liquid xenon around thin wires are reported. The maximum proportional scintillation gain of 287 +97 photons per drift electron was obtained using 10 m m diameter gold plated tungsten wire. The threshold for electron multiplication and proportional scintillation is measured as 725 +48 and 412 +10 kV/cm, respectively. The threshold for proportional scintillation is in good agreement with previously published result, while the electron multiplication threshold represents a novel measurement. A complete set of parameters for the practical use of the electron multiplication and proportional scintillation processes in liquid xenon was also obtained for the first time. The work was triggered by the promising application of proportional scintillation in liquid xenon for simpler and more sensitive dark matter detectors.

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