The bubble-assisted Liquid Hole Multiplier (LHM) is a recently-proposed concept for the combined detection of ionization electrons and primary scintillation photons in noble-liquid time projection chambers. The LHM comprises a perforated micro-pattern electrode (e.g. Thick Gas Electron Multiplier - THGEM, or Gas Electron Multiplier - GEM) immersed in the liquid, with a bubble of the noble gas supported underneath. Ionization electrons and scintillation-induced photoelectrons extracted from a cesium iodide photocathode drift through the electrode's holes and induce electroluminescence (EL) signals in the bubble; these are recorded by photon detectors located closely below the electrode. We present recent results in the development of LHMs, comparing the response of different electrodes to ionization and photon-induced electrons.
@article{arxiv.1708.00073,
title = {Progress with Xenon Liquid Hole Multipliers},
author = {Lior Arazi and Eran Erdal and Yevgeniya Korotinsky and Michael Rappaport and Arindam Roy and Sergei Shchemelinin and David Vartsky and Amos Breskin},
journal= {arXiv preprint arXiv:1708.00073},
year = {2017}
}
Comments
Presented at 2016 IEEE NSS/MIC, Strasbourg, France, 29 October - 5 November 2016