METHOD OF DETECTING IONISATION SIGNAL IN CHARGE EMISSION DETECTORS Russian patent published in 2014 - IPC G01T1/00 

FIELD: physics.

SUBSTANCE: invention relates to low-background experiments to search for rare events, e.g., interactions of dark matter with ordinary matter, and can be used in experiments to investigate interaction of neutrinos (antineutrinos) with energy of 1-100 MeV with matter. The method of detecting an ionisation signal in charge emission detectors includes generating an electric field in liquid xenon, pulling ionisation electrons towards the liquid-saturated vapour boundary surface, drawing (emitting) ionisation electrons into the gas phase and subsequent detection thereof in the gas phase, wherein an electronegative substance is dissolved in the liquid xenon, said substance having a high capture coefficient for ionisation electrons, thermalised under the boundary surface of liquid and gaseous xenon, and simultaneously having a low capture coefficient for ionisation electrons drifting in the liquid xenon.

EFFECT: significant reduction of the background of captured subsurface electrons, low energy threshold of detection and high sensitivity.

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