First observation of neutral bremsstrahlung electroluminescence in liquid argon
arXiv:2305.08084 · doi:10.1103/PhysRevLett.131.241001
Abstract
A recent discovery of additional mechanism of electroluminescence (EL) in noble gases due to the neutral bremsstrahlung (NBrS) effect led to a prediction that NBrS EL should be present in noble liquids as well. A theoretical model of NBrS EL in noble liquids was developed accordingly in the frameworks of Cohen-Lekner and Atrazhev. In this work, we confirm this prediction: for the first time, visible-range EL has been observed in liquid argon at electric fields reaching 90~kV/cm, using Gas Electron Multiplier (GEM) and Thick GEM (THGEM) structures. Absolute light yields of the EL were measured and found to be in excellent agreement with the theory, provided that the momentum-transfer cross section of electron scattering is used for calculation of NBrS cross section (instead of the energy-transfer one).
arXiv comment6 pages, 4 figures
References in corpus (26)
- Dark Matter Search Results from a One TonneYear Exposure of XENON1T
- Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX data
- DarkSide-50 532-day Dark Matter Search with Low-Radioactivity Argon
- Liquid noble gas detectors for low energy particle physics
- Characterization of Three High Efficiency and Blue Sensitive Silicon Photomultipliers
- Optical readout tracking detector concept using secondary scintillation from liquid argon generated by a thick gas electron multiplier
- A simulation toolkit for electroluminescence assessment in rare event experiments
- Revealing neutral bremsstrahlung in two-phase argon electroluminescence
- Measurements of proportional scintillation and electron multiplication in liquid xenon using thin wires
- Characterisation of a large area silicon photomultiplier
- GEM operation in helium and neon at low temperatures
- Electroluminescence and electron avalanching in two-phase detectors
- Photon emission and atomic collision processes in two-phase argon doped with xenon and nitrogen
- Neutral Bremsstrahlung emission in xenon unveiled
- X-ray ionization yields and energy spectra in liquid argon
- Neutral bremsstrahlung electroluminescence in noble liquids
- The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications
- Electron transport and electric field simulations in two-phase detectors with THGEM electrodes
- Neutral bremsstrahlung and excimer electroluminescence in noble gases and its relevance to two-phase dark matter detectors
- Low Energy Electronic Recoils and Single Electron Detection with a Liquid Xenon Proportional Scintillation Counter
- Measurement of emission spectrum for gaseous argon electroluminescence in visible light region from 300 to 600 nm
- Study of infrared scintillations in gaseous and liquid argon - Part I: methodology and time measurements
- Bremsstrahlung on noble gases at low energies
- Bubble-assisted Liquid Hole Multipliers in LXe and LAr: towards "local dual-phase TPCs"
- Puzzling time properties of proportional electroluminescence in two-phase argon detectors for dark matter searches
- Study of visible-light emission in pure and methane-doped liquid argon