Liquid Hole-Multipliers: A potential concept for large single-phase noble-liquid TPCs of rare events

6th Symposium on Large TPCs for Low Energy Rare Event Detection

Breskin, Amos^1

Department of Astrophysics and Particle Physics, Weizmann Institute of Science, 76100 Rehovot, Israel^1

关键词: Cascaded gas ELECTRON multipliers;    Dark matter detectors;    Gas electron multipliers;    Gaseous photomultipliers;    Ionization charge;    Ionization electrons;    Radiation-induced;    Scintillation light;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/460/1/012020/pdf
DOI  :  10.1088/1742-6596/460/1/012020

来源: IOP

【 摘 要 】

A novel concept is proposed for large-volume single-phase noble-liquid TPC detectors for rare events. Both radiation-induced scintillation-light and ionization-charge are detected by Liquid Hole-Multipliers (LHM), immersed in the noble liquid. The latter may consist of cascaded Gas Electron Multipliers (GEM), Thick Gas Electron Multiplier (THGEM) electrodes or others, coated with CsI UV-photocathodes. Electrons, photo-induced on CsI by primary scintillation in the noble liquid, and event-correlated drifting ionization electrons are amplified in the cascaded elements primarily through electroluminescence, and possibly through additional moderate avalanche, occurring within the holes. The resulting charge-signals or light-pulses are recorded on anode pads or with photosensors-e.g. gaseous photomultipliers (GPM), respectively. Potential affordable solutions are proposed for multi-ton dark-matter detectors; open questions are formulated for validating this dream.