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arXiv · 1912.10698

Bubble-assisted Liquid Hole Multipliers in LXe and LAr: towards "local dual-phase TPCs"

E. Erdal·L. Arazi·A. Breskin·S. Shchemelinin·A. Roy·A. Tesi·D. Vartsky·S. Bressler
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Abstract

The bubble-assisted Liquid Hole Multiplier (LHM) is a novel concept for the combined detection of ionization electrons and scintillation photons in noble-liquid time projection chambers. It consists of a perforated electrode immersed in the noble liquid, with heating wires generating a stable bubble underneath. Radiation-inducted ionization electrons in the liquid drift into the electrode's holes and cross the liquid-vapor interface into the bubble where they induce electroluminescence (EL). The top surface of the electrode is optionally coated with a CsI photocathode; radiation-induced UV-scintillation photons extract photoelectrons that induce EL in a similar way. EL-photons recorded with an array of photosensors, e.g. SiPMs, provide event localization. We present the basic principles of the LHM and summarize the results obtained in LXe and LAr.

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E. Erdal, L. Arazi, A. Breskin, S. Shchemelinin, A. Roy, A. Tesi, D. Vartsky, S. Bressler. 2019-12-23. Bubble-assisted Liquid Hole Multipliers in LXe and LAr: towards "local dual-phase TPCs". https://doi.org/10.1088/1748-0221/15/04/c04002

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