Conversion efficiencies of electron beam energy to vacuum ultraviolet light for Ne, Ar, Kr, and Xe excited with continuous electron beams

Morozov, A.; Heindl, T.; Krücken, R.; Ulrich, A.; Wieser, J.

doi:10.1063/1.2931000

Cited by 35 publications

(30 citation statements)

References 31 publications

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“…The observed atomic lines are similar to those seen by Kurunczi et al (2001) using high-pressure microhollow discharge in He. Emission of H(Lyα) is also observed in pure He by Fuchs et al (1995) using a low-frequency He discharge lamp and by Morozov et al (2008) in pure Ne. Aside from the intense H(Lyα) emission, Fedenev et al (2004) have observed the nitrogen lines from a radiation source using pure He excited by an electron beam.…”

Section: Methodsmentioning

confidence: 88%

Optimization of a Solar Simulator for Planetary-Photochemical Studies

Es-sebbar

Bénilan

Fray

et al. 2015

ApJS

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Low-temperature microwave-powered plasma based on hydrogen and hydrogen with noble gas mixtures are widely used as a continuous vacuum ultraviolet (VUV) source in laboratory experiments carried out to mimic the photochemistry in astrophysical environments. In this work, we present a study dedicated to optimizing such sources in terms of mono-chromaticity at Lyα (H(Lyα) line at 121.6 nm ∼ 10.2 eV) and high spectral irradiance. We report the influence on the emission spectrum of a wide range of experimental conditions including gas composition (pure H 2 , pure He, and H 2 /He mixture), gas pressure, flow rates, and microwave power. The absolute spectral irradiance delivered by this VUV light source has been measured. With a microwave input power of 100 W, the best conditions for producing a quasi-monochromatic source are a 1% H 2 /He gas mixture at a total pressure of 5 mbar and a flow rate of 2 sccm. By changing the microwave input power from 30 to 120 W, H(Lyα) increases by more than one order of magnitude. A comparison between the current measurements and the solar VUV spectral irradiance is reported over 115-170 nm.

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Section: Methodsmentioning

confidence: 88%

Optimization of a Solar Simulator for Planetary-Photochemical Studies

Es-sebbar

Bénilan

Fray

et al. 2015

ApJS

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“…Fig. 1 Photon emission spectra in gaseous Ar due to ordinary scintillations in the VUV measured in [22], NBrS electroluminescence at 8.3 Td theoretically calculated in [15] and avalanche scintillations in the NIR measured in [17,18]. Also shown are the photon detection efficiency (PDE) of the SiPMs (MPPC 13360-6050PE [23]) at an overvoltage of 5.6 V obtained from [24] and the transmittance of the acrylic plate (1.5 mm thick) in front of the SiPM matrix, used in this study…”

Section: Wavelength (Nm)mentioning

confidence: 99%

SiPM-matrix readout of two-phase argon detectors using electroluminescence in the visible and near infrared range

Aalseth¹,

Abdelhakim²,

Agnes³

et al. 2021

Eur. Phys. J. C

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Proportional electroluminescence (EL) in noble gases is used in two-phase detectors for dark matter searches to record (in the gas phase) the ionization signal induced by particle scattering in the liquid phase. The “standard” EL mechanism is considered to be due to noble gas excimer emission in the vacuum ultraviolet (VUV). In addition, there are two alternative mechanisms, producing light in the visible and near infrared (NIR) ranges. The first is due to bremsstrahlung of electrons scattered on neutral atoms (“neutral bremsstrahlung”, NBrS). The second, responsible for electron avalanche scintillation in the NIR at higher electric fields, is due to transitions between excited atomic states. In this work, we have for the first time demonstrated two alternative techniques of the optical readout of two-phase argon detectors, in the visible and NIR range, using a silicon photomultiplier matrix and electroluminescence due to either neutral bremsstrahlung or avalanche scintillation. The amplitude yield and position resolution were measured for these readout techniques, which allowed to assess the detection threshold for electron and nuclear recoils in two-phase argon detectors for dark matter searches. To the best of our knowledge, this is the first practical application of the NBrS effect in detection science.

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“…The singlet and triplet excimer states are responsible respectively for the fast and slow emission components observed in proportional EL. Their time constants are of 4.2 ns and 3.1 μs respectively: [8], NBrS EL at 8.3 Td theoretically calculated in [9] and avalanche scintillations in the near infrared (NIR) measured in [10,11]. Also shown are the photon detection efficiency (PDE) of SiPM (MPPC 13360-6050PE (Hamamatsu)) at overvoltage of 5.6 V and the transmittance of the acrylic plate (1.5 mm thick) [12].…”

Section: Electroluminescence Due To Excimer Emissionmentioning

confidence: 99%

Electroluminescence and Electron Avalanching in Two-Phase Detectors

Buzulutskov

2020

Instruments

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Electroluminescence and electron avalanching are the physical effects used in two-phase argon and xenon detectors for dark matter searches and neutrino detection, to amplify the primary ionization signal directly in cryogenic noble-gas media. We review the concepts of such light and charge signal amplification, including a combination thereof, both in the gas and in the liquid phase. Puzzling aspects of the physics of electroluminescence and electron avalanching in two-phase detectors are explained, and detection techniques based on these effects are described.

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Conversion efficiencies of electron beam energy to vacuum ultraviolet light for Ne, Ar, Kr, and Xe excited with continuous electron beams

Cited by 35 publications

References 31 publications

Optimization of a Solar Simulator for Planetary-Photochemical Studies

Optimization of a Solar Simulator for Planetary-Photochemical Studies

SiPM-matrix readout of two-phase argon detectors using electroluminescence in the visible and near infrared range

Electroluminescence and Electron Avalanching in Two-Phase Detectors

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