Bubble-assisted Liquid Hole Multipliers in LXe and LAr: towards "local dual-phase TPCs"
arXiv:1912.10698 · doi:10.1088/1748-0221/15/04/C04002
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.
arXiv commentpresented at LIDINE 2019; to be published in JINST
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- Development of very-thick transparent GEMs with wavelength-shifting capability for noble element TPCs
- Design and construction of Xenoscope -- a full-scale vertical demonstrator for the DARWIN observatory
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