Liquid Hole Multipliers: bubble-assisted electroluminescence in liquid xenon
arXiv:1505.02316 · doi:10.1088/1748-0221/10/08/P08015
Abstract
In this work we discuss the mechanism behind the large electroluminescence signals observed at relatively low electric fields in the holes of a Thick Gas Electron Multiplier (THGEM) electrode immersed in liquid xenon. We present strong evidence that the scintillation light is generated in xenon bubbles trapped below the THGEM holes. The process is shown to be remarkably stable over months of operation, providing - under specific thermodynamic conditions - energy resolution similar to that of present dual-phase liquid xenon experiments. The observed mechanism may serve as the basis for the development of Liquid Hole Multipliers (LHMs), capable of producing local charge-induced electroluminescence signals in large-volume single-phase noble-liquid detectors for dark matter and neutrino physics experiments.
Submitted to JINST
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- First in-beam studies of a Resistive-Plate WELL gaseous multiplier
- First results of a large-area cryogenic gaseous photomultiplier coupled to a dual-phase liquid xenon TPC
- The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications
- First demonstration of VUV-photon detection in liquid xenon with THGEM and GEM-based Liquid Hole Multipliers
- Recent Advances in Bubble-Assisted Liquid Hole Multipliers in Liquid Xenon
- First demonstration of a bubble-assisted Liquid Hole Multiplier operation in liquid argon
- First Imaging Results of a Bubble-assisted Liquid Hole Multiplier with SiPM readout in Liquid Xenon
- Bubble-assisted Liquid Hole Multipliers in LXe and LAr: towards "local dual-phase TPCs"
- Novel electron and photon recording concepts in noble-liquid detectors
- Evolution and Recent Developments of the Gaseous Photon Detectors Technologies
- First results on FHM -- a Floating Hole Multiplier
- Xenon Bubble Chambers for Direct Dark Matter Detection
- Electron transfer efficiency in liquid xenon across THGEM holes
- Direct observation of bubble-assisted electroluminescence in liquid xenon