Topic
Buffer gas
About: Buffer gas is a research topic. Over the lifetime, 3565 publications have been published within this topic receiving 47283 citations.
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TL;DR: In this paper, the authors measured the rates of decay of the atomic ion species in afterglow plasmas in pure neon and argon at various pressures within the range 0·01-2 torr.
Abstract: Measurements have been made at room temperature of the rates of decay of the atomic ion species in afterglow plasmas in pure neon and argon at various pressures within the range 0·01-2 torr. In both gases, the variation of the measured decay rates with pressure, observed over about two orders of magnitude in pressure, is consistent with the loss of the atomic inert gas ions by diffusion to the plasma boundary and by conversion to molecular inert gas ions in three-body reactions with the neutral gas. The present measurements constitute the first observations of the three-body conversion process in argon by a method providing mass identification of the participating ion species. The values obtained for the rates of the conversion reaction in neon and in argon and for the reduced mobilities of the atomic inert gas ions in their pure parent gases are νNe+ = (99±5)po2s-1, νAr+ = (313±12)po2s-1 μNe+ = 4.6±0.4 cm2 V-1s-1, μAr+ = 1.75±0.15) cm2 V-1s-1. These results are compared with the values which have been obtained by other workers and comparisons are also made with the existing theoretical estimates of the measured parameters.
52 citations
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TL;DR: In this article, the authors used three-photon ionization spectroscopy for the detection of ground-state atomic hydrogen and deuterium with an implicit time resolution of less than 10 nsec.
Abstract: Resonantly enhanced three‐photon ionization spectroscopy is employed for the detection of ground‐state atomic hydrogen and deuterium. Concentrations as low as 4×109 atoms/cm3 in the presence of 1017 atoms/cm3 of buffer gas are detected with an implicit time resolution of less than 10 nsec. A useful dynamic range of at least 4×104 is demonstrated and saturation of the ionization in a 2×10−4‐cm3 focal volume is observed. The presence of H can easily be distinguished from that of D and the three‐dimensional spatial distribution of H or D can be determined.
52 citations
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27 Aug 1976TL;DR: In this article, a hydrogen-oxygen fueled internal combustion engine is described, which utilizes an inert gas such as argon, as a working fluid to increase the efficiency of the engine, eliminate pollution, and facilitate operation of a closed cycle energy system.
Abstract: A hydrogen-oxygen fueled internal combustion engine is described herein, which utilizes an inert gas, such as argon, as a working fluid to increase the efficiency of the engine, eliminate pollution, and facilitate operation of a closed cycle energy system. In a system where sunlight or other intermittent energy source is available to separate hydrogen and oxygen from water, the oxygen and inert gas are taken into a diesel engine into which hydrogen is injected and ignited. The exhaust is cooled so that it contains only water and the inert gas. The inert gas in the exhaust is returned to the engine for use with fresh oxygen, while the water in the exhaust is returned to the intermittent energy source for reconversion to hydrogen and oxygen.
51 citations
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TL;DR: In this article, the spatial distribution of small-signal gain in a plane transverse to the laser axis has been measured and the active discharge cross sections with better than 90% gain uniformity were 2.8×3.0 and 2.5 cm2 for XeCl and KrF, respectively.
Abstract: Spatially uniform avalanche discharges of relatively long duration have been obtained in a UV‐preionized, high‐pressure, rare‐gas–halide laser. In the case of XeCl pulse durations as long as 70 ns have been observed. The spatial distribution of the small‐signal gain in a plane transverse to the laser axis has been measured. The active discharge cross sections with better than 90% gain uniformity were 2.8×3.0 and 2.8×2.5 cm2 for XeCl and KrF, respectively. The use of neon rather than helium as a buffer gas increased the discharge cross section, and the laser pulse duration resulting in improved laser output energy densities of 4.5 J/l in XeCl and 2.8 J/l in KrF.
51 citations
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TL;DR: In this paper, a high efficiency potassium laser using a 0.15 nm bandwidth alexandrite laser as the pump source was demonstrated, achieving a 64% slope efficiency and a 57% optical to optical conversion.
51 citations