Self-contained compact pulsed laser based on an auto-wave photon-branched chain reaction

2000 ◽  
Vol 71 (6) ◽  
pp. 813-818 ◽  
Author(s):  
R.R. Letfullin ◽  
T.F. George
Keyword(s):  
Pulsed Laser ◽  
Chain Reaction ◽  
Branched Chain

scholarly journals On the explosion of chain-thermal reactions

1982 ◽  
Vol 24 (2) ◽  
pp. 194-202 ◽  
Author(s):  
R. O. Ayeni
Keyword(s):  
Activation Energy ◽  
Asymptotic Analysis ◽  
Upper Bound ◽  
Homogeneous Model ◽  
Chain Reaction ◽  
Isothermal Reaction ◽  
Thermal Reactions ◽  
Spatially Homogeneous ◽  
Branched Chain ◽  
A Chain

AbstractA chain reaction of oxygen (reactant) and hydrogen (active intermediary) with mtrosyl chloride (sensitizer) as a catalyst may be modelled mathematically as a non-isothermal reaction. In this paper we present an asymptotic analysis of a spatially homogeneous model of a non-isothermal branched-chain reaction. Of particular interest is the so-called explosion time and we provide an upper bound for it as a function of the activation energy which can vary over all positive values. We also establish a bound on the temperature when the activation energy is finite.

scholarly journals Laser-Induced Photon-Branched Chain Reaction in a Chemically-Active Gas-Dispersed Medium

2008 ◽  
Vol 2008 ◽  
pp. 1-10
Author(s):  
Renat R. Letfullin ◽  
Thomas F. George ◽  
Galen C. Duree
Keyword(s):  
Active Medium ◽  
High Energy ◽  
Extensive Study ◽  
Chain Process ◽  
Chain Reaction ◽  
Two Phase ◽  
Dispersed Medium ◽  
Branched Chain ◽  
Short Time ◽  
Promising Avenue

A promising avenue in the development of high-energy pulsed chemical HF/DF lasers and amplifiers is the utilization of a photon-branched chain reaction initiated in a two-phase active medium, that is, a medium containing a laser working gas and ultradispersed passivated metal particles. These particles are evaporated under the action of IR laser radiation which results in the appearance of free atoms, their diffusion into the gas, and the development of a photon-branching chain process, which involves photons as both reactants and products. The key obstacle here is the formation of a relatively large volume (in excess of 103 cm3) of the stable active medium and filling this volume homogeneously for a short time with a submicron monodisperse metal aerosol, which has specified properties. In this paper, results are presented for an extensive study of laser initiation of a photon-branched chain reaction in a gas-dispersed H2–F2 medium.

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