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

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 vapor...

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Bibliographic Details
Published in:Journal of instrumentation 2020-04, Vol.15 (4), p.C04002-C04002
Main Authors: Erdal, E., Arazi, L., Breskin, A., Shchemelinin, S., Roy, A., Tesi, A., Vartsky, D., Bressler, S.
Format: Article
Language:English
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Summary: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 vapor bubble underneath. Radiation-induced 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 photo-sensors, e.g. SiPMs, provide event localization. We present the basic principles of the LHM concept and summarize the results obtained in LXe and LAr.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/15/04/C04002