Atmospheric Pressure Operation of a KrF Laser Oscillator and Amplifier with a Krypton-Rich Mixture and a Kr/F2 Mixture

1987 ◽  
Vol 11 (3) ◽  
pp. 548-559 ◽  
Author(s):  
Akira Suda ◽  
Minoru Obara ◽  
Akira Noguchi
Keyword(s):  
Atmospheric Pressure ◽  
Laser Oscillator ◽  
Rich Mixture ◽  
Krf Laser

Characteristics of an electron beam pumped KrF laser amplifier with an atmospheric‐pressure Kr‐rich mixture in a strongly saturated region

1987 ◽  
Vol 51 (4) ◽  
pp. 218-220 ◽  
Author(s):  
Akira Suda ◽  
Hiroshi Kumagai ◽  
Minoru Obara
Keyword(s):  
Electron Beam ◽  
Atmospheric Pressure ◽  
Laser Amplifier ◽  
Rich Mixture ◽  
Krf Laser

Properties of a KrF laser with atmospheric‐pressure Kr‐rich mixture pumped by an electron beam

1985 ◽  
Vol 58 (3) ◽  
pp. 1129-1134 ◽  
Author(s):  
Akira Suda ◽  
Minoru Obara ◽  
Akira Noguchi
Keyword(s):  
Electron Beam ◽  
Atmospheric Pressure ◽  
Rich Mixture ◽  
Krf Laser

Formation of plasma columns in atmospheric pressure gases by picosecond KrF laser pulses

1992 ◽  
Vol 93 (5-6) ◽  
pp. 366-377 ◽  
Author(s):  
Y.M. Li ◽  
J.N. Broughton ◽  
R. Fedosejevs ◽  
T. Tomie
Keyword(s):  
Atmospheric Pressure ◽  
Laser Pulses ◽  
Krf Laser

High‐efficiency extraction study of an electron beam pumped ArF laser amplifier with an atmospheric‐pressure Ar‐rich mixture

1988 ◽  
Vol 52 (16) ◽  
pp. 1294-1296 ◽  
Author(s):  
Young‐Woo Lee ◽  
Hiroshi Kumagai ◽  
Shu‐ichi Ashidate ◽  
Minoru Obara
Keyword(s):  
Electron Beam ◽  
Atmospheric Pressure ◽  
High Efficiency ◽  
Laser Amplifier ◽  
Rich Mixture ◽  
Extraction Study ◽  
Arf Laser

Carbon Dioxide Effects on the Flammability Characteristics of Biogas

2014 ◽  
Vol 493 ◽  
pp. 129-133
Author(s):  
Nurkholis Hamidi
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Flame Speed ◽  
Flammability Limit ◽  
Flammability Limits ◽  
Rich Mixture ◽  
Flammability Characteristics ◽  
The Rich ◽  
Observation Results

Flammability limits and flame speed of methane-carbon dioxide-air mixtures have been studied to understand the effect of carbondioxide on the flammability characteristic of biogas. The fuel of biogas discussed in this study was made by mixing gases of methane and carbon dioxide. The carbon dioxide was varied from 0% (by volume) untill reach the flammability limit of the stoikhiometri biogas-air mixtures. The observation was done using a cubic combustion bomb with the dimension of 500 mm x 200 mm x 10 mm with the initial condition being at room temperature and atmospheric pressure. The ignitor was set at the top of combustion bomb, so the flame propagated downward. Base on the observation results, the presence of carbon dioxide in the fuel ofbiogas caused the flammability limits of biogasair mixture narrower. The biogas-air mixture was still flammable with the highest content of carbon dioxide of 62.5 %vol when the mixture was sthoichiometri. Compared to methane-air mixture, the presence of carbon dioxide in biogas caused a reduction in the flame speed. The stoichiometri mixture has the highest flame speed when the carbon dioxide was not present in the fuel. However, when the carbon dioxide was added in the fuel, the rich mixture has the highest flame speed. This is a consequence of the rich biogas-air mixture having a higher fraction of the carbon dioxide components from the fuel compared to the stoichiometri and lean biogas-air mixture. The result also indicated that at the upper limit the flame still propagated downward to closed to the endwall. However, at the lower limit (lean mixtures), the flame did not intend to propagate downward, it was just at the top and propagate sideward.

Atmospheric pressure chemical vapour deposition of selenium films by KrF laser photolysis of dimethyl selenium

2001 ◽  
Vol 172 (3-4) ◽  
pp. 220-224 ◽  
Author(s):  
Josef Pola ◽  
Zdeněk Bastl ◽  
Jan Šubrt ◽  
Akihiko Ouchi
Keyword(s):  
Chemical Vapour Deposition ◽  
Atmospheric Pressure ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Laser Photolysis ◽  
Selenium Films ◽  
Krf Laser ◽  
Pressure Chemical

Atmospheric pressure operation of an electron beam excited KrF laser using Kr/F2mixtures

1984 ◽  
Vol 45 (11) ◽  
pp. 1165-1167 ◽  
Author(s):  
Akira Suda ◽  
Minoru Obara ◽  
Tomoo Fujioka
Keyword(s):  
Electron Beam ◽  
Atmospheric Pressure ◽  
Krf Laser

Power extraction study of ane‐beam‐pumped atmospheric pressure, Kr‐rich KrF laser amplifier

1989 ◽  
Vol 65 (12) ◽  
pp. 4532-4541 ◽  
Author(s):  
Young‐Woo Lee ◽  
Fumihiko Kannari ◽  
Minoru Obara
Keyword(s):  
Atmospheric Pressure ◽  
Laser Amplifier ◽  
Power Extraction ◽  
Extraction Study ◽  
Krf Laser

scholarly journals Detection of Unburned Hydrocarbons (UHC) in an Atmospheric Pressure Combustor With Premixing and Prevaporization Using a Tuneable Excimer Laser

1996 ◽  
Author(s):  
Rudolf Lachner ◽  
Daniel Theisen ◽  
Hans Kettl ◽  
Rainer Fink ◽  
Dieter Rist ◽  
...  
Keyword(s):  
Combustion Chamber ◽  
Excimer Laser ◽  
Atmospheric Pressure ◽  
Imaging Technique ◽  
Gaseous Fuel ◽  
Symmetry Line ◽  
Krf Laser ◽  
Unburned Hydrocarbons ◽  
193 Nm ◽  
Combustion Processes

Gaseous unburned hydrocarbons (UHC) are investigated in an atmospheric pressure combustor with premixing and prevaporization. The rectangular combustion chamber is equipped with silica quartz windows allowing laser-based investigations in the UV regime. A new double shell concept is employed to atomize the fuel (n-heptane) and to stabilize the flame. For the detection of UHC, a tuneable ArF (λ ≈ 193 nm) or KrF (λ ≈ 248 nm) excimer laser is used. The results show that this imaging technique is feasible in an atmospheric pressure, liquid fuelled combustor. Liquid and gaseous fuel is detected inside the vortices induced by the double shell, where the main combustion processes occur. Furthermore, droplets and UHC can be found along the symmetry line of the double shell. Comparing the two approaches used for the visualization of UHC, it turns out that the application of a KrF laser seems to be more suitable.

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