Journal ArticleDOI
The Effective Cross Section
TLDR
The effection cross section concept for low intensity light illumination of gas discharges is shown to be analogous to high intensity breakdown of gases as interpreted by Panarella's "effective photon" concept as discussed by the authors.Abstract:
The effection cross section concept for low intensity light illumination of gas discharges is shown to be analogous to high intensity breakdown of gases as interpreted by Panarella's "effective photon" concept. This mathematical result is suggested as a possible interpretation of strikingly similar nonlinearities of gas breakdown by light measured in both cases at their respectively different intensity levels.read more
Citations
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Journal ArticleDOI
Photoionization of excited atoms in dc gas discharges by low‐intensity light and its analogy to gas‐breakdown with high‐intensity lasers
TL;DR: Spectral effects and nonlinearities that characterize illumination of dc discharges by low-intensity light and illumination of gas cells by high-intensity lasers are described in this paper, which can be used to deepen the understanding of the low intensity EM radiation interaction with gas discharges and as a possible tool for further study of gas breakdown by highintensity lasers, including further investigation of the effective photon concept.
Journal ArticleDOI
Gas discharge response to light: dependence of linearity on space charge for optogalvanic and excited-state photoionization signals
TL;DR: Experiments involving He-Cd and Ar laser beam interactions with an Ar discharge indicate that space charge effects generated by the incident light itself are the physical mechanism responsible for nonlinearity of response in discharge regions of excited atom concentration spatial gradients.
Journal ArticleDOI
Photoionization of excited atoms by low intensity light: experimental test of the effective cross section
TL;DR: The effective cross-section concept, analogous mathematically to Panarella's effective photon concept, is confirmed experimentally and Uniform spatial profiles of excited atom cross sections yield linear response to incident light, unlike previous results with Gaussian spatial profiles.
References
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Journal ArticleDOI
Multiphoton ionization of rare gases at 1.06µ and 0.53µ
TL;DR: In this article, the orders of nonlinearity of the interaction between an intense focused beam of optical photons and matter in gaseous form at low pressure (10-3torr) brings into play some strongly nonlinear processes.
Journal ArticleDOI
Theory of laser-induced gas ionization
TL;DR: The mechanism of laser-induced gas ionization is analyzed in the context of the theories presently available, namely multiphoton and cascade theory, and their predictions are shown to be in serious divergence from experimentation as discussed by the authors.
Journal ArticleDOI
Improved detection of ultraviolet radiation with gas-filled phototubes through photoionization of excited atoms
TL;DR: Using dc biases higher than those recommended by manufacturers, it is possible to exploit photoionization of excited atoms to obtain high sensitivities to uv radiation using gas-filled phototubes.
Journal ArticleDOI
Focal-Length Dependence of Air Breakdown by a 20-psec Laser Pulse: Theoretical Interpretation through the Effective-Photon Concept
Journal ArticleDOI
Photo Ionization of Excited Atoms in Gas-Filled Photodiodes: Improved Detectivity with Microsecond-Order Risetime
Norman S. Kopeika,G. Eytan +1 more
TL;DR: In this paper, the authors used large dc bias fields for detecting ultra-violet raidation in gas-filled photodiodes, and showed that the response is non-linear with? varying inversely with wavelength.
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