Detachment instability of self-sustained volume discharge in active media of non-chain HF(DF) lasers

Journal Article · Fri Aug 27 00:00:00 EDT 2010 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2010V040N06ABEH014347· OSTI ID:21471333

Belevtsev, A A ^[1]; Kazantsev, S Yu; Kononov, I G; Firsov, K N ^[2]

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1. Institute for High Energy Densities, Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow (Russian Federation)
2. A M Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

The development of detachment instability in active media of electric-discharge non-chain HF(DF) lasers due to the electron-impact detachment of electrons from negative ions is considered. This instability is initiated in large volumes of SF{sub 6}-based gas mixtures, spatially separated from electrodes and heated by a pulsed CO{sub 2} laser. The self-organisation of self-sustained volume discharge upon laser heating, which results in the formation of quasi-periodic plasma structures within the discharge gap, is experimentally investigated. The evolution of these structures, depending on the gas temperature and specific deposition of electric energy, is analysed. The possible relationship between the self-organisation and detachment instability is discussed. A mechanism of development of single plasma channels in the working media of HF(DF) lasers, based on electron-impact destruction of negative ions is proposed. (active media)

• OSTI ID: 21471333
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 40, Issue 6; Other Information: DOI: 10.1070/QE2010v040n06ABEH014347; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANIONS
CARBON DIOXIDE LASERS
ELECTRIC DISCHARGES
ELECTRODES
ELECTRONS
HYDROFLUORIC ACID
INSTABILITY
LASER-RADIATION HEATING
MIXTURES
PERIODICITY
PLASMA
SULFUR FLUORIDES
CHARGED PARTICLES
DISPERSIONS
ELEMENTARY PARTICLES
FERMIONS
FLUORIDES
FLUORINE COMPOUNDS
GAS LASERS
HALIDES
HALOGEN COMPOUNDS
HEATING
HYDROGEN COMPOUNDS
INORGANIC ACIDS
INORGANIC COMPOUNDS
IONS
LASERS
LEPTONS
PLASMA HEATING
SULFUR COMPOUNDS
VARIATIONS