Numerical study of He/CF{sub 3}I pulsed discharge used to produce iodine atom in chemical oxygen-iodine laser
- School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116024 (China)
The pulsed discharge for producing iodine atoms from the alkyl and perfluoroalky iodides (CH{sub 3}I, CF{sub 3}I, etc.) is the most efficient method for achieving the pulse operating mode of a chemical oxygen-iodine laser. In this paper, a one-dimensional fluid model is developed to study the characteristics of pulsed discharge in CF{sub 3}I-He mixture. By solving continuity equation, momentum equation, Poisson equation, Boltzmann equation, and an electric circuit equation, the temporal evolution of discharge current density and various discharge products, especially the atomic iodine, are investigated. The dependence of iodine atom density on discharge parameters is also studied. The results show that iodine atom density increases with the pulsed width and pulsed voltage amplitude. The mixture ratio of CF{sub 3}I and helium plays a more significant role in iodine atom production. For a constant voltage amplitude, there exists an optimal mixture ratio under which the maximum iodine atom concentration is achieved. The bigger the applied voltage amplitude is, the higher partial pressure of CF{sub 3}I is needed to obtain the maximum iodine atom concentration.
- OSTI ID:
- 22130483
- Journal Information:
- Physics of Plasmas, Vol. 20, Issue 4; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ATOMS
BOLTZMANN EQUATION
CHEMICAL LASERS
CONTINUITY EQUATIONS
CURRENT DENSITY
GLOW DISCHARGES
HELIUM
IODINE
IODINE LASERS
METHYL IODIDE
MIXTURES
NUMERICAL ANALYSIS
ONE-DIMENSIONAL CALCULATIONS
OXYGEN
PARTIAL PRESSURE
PLASMA DENSITY
PLASMA PRESSURE
POISSON EQUATION
PULSES
TRANSPORT THEORY