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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 1863-1869 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The mechanism of negative differential conductivity (NDC) in an electron-beam sustained gas discharge of pure Xe is investigated by modeling. The drift velocity of electrons in Xe has been calculated using a self-consistent kinetic model. Model calculations involves the self-consistent solution of the Boltzmann equation for electron energy distribution function in the two-term approximation and a complete set of rate equations for the excited and ionic species in the discharge plasma. It is shown that the main factor responsible for the observation of the NDC effect is Coulomb interaction between electrons. Regions in experimentally achievable parameter space where NDC can be observed are determined. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 65 (1994), S. 1888-1890 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Gain and absorption of the ionic excimer (XeCs)+ emission at 160 nm in Ar/Xe/Cs mixtures were studied by kinetic model calculations. Both the e-beam and the self-sustained discharge excitation schemes were investigated. Model results indicate that when pumped by 20 ns, 1 MeV e-beam, the mixtures exhibit only loss as absorption due to atomic Cs dominates. Under discharge pumping, 99.9% of the atomic Cs is ionized. Positive net gain up to 2%/cm in the ternary discharge plasma is predicted by model calculations. © 1994 American Institue of Physics.
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  • 3
    ISSN: 1432-0649
    Keywords: 42.55G ; 52.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The vibrational kinetics of HCl in a Ne-buffered XeCl selfsustained laser discharge is self-consistently calculated by coupling the vibrational master equation with the chemical one, the Boltzmann equation for electron transport and the circuit equations. The results show the limits of the classical simplified schemes of HCl vibrational kinetics used in the literature. Problems connected with the neglection of HCl depletion instabilities in the calculations are discussed using a parallel resistor network model.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of experimental and theoretical physics 88 (1999), S. 227-234 
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An equation is derived for the smooth envelope of a wave field propagating in a plane stratified medium possessing the resonance small-scattering effect on one period of the structure. Rectilinear propagation of the envelope of the field is detected in the xz plane, where x is normal to the layers. The conditions under which this equation can be used are indicated. For a linear array of semiconductor diodes with a stepwise dependence of the permittivity on the coordinates, the conditions for stable propagation of the radiation are analyzed and an explicit solution of the isolated-soliton type is found.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of experimental and theoretical physics 88 (1999), S. 875-881 
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It has been theoretically proven that a chaotic laser driven by an injected signal derived from a similar chaotic master oscillator working at a slight frequency offset operates in a new mode of synchronization. There is a certain relationship between average laser fields, which has been approximately calculated in an explicit form, and instantaneous fields form an attractor about the point defined by these average values, with a relatively small spread in the phase trajectories around it. It has been shown that such a configuration can be used in transmitting confidential information.
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  • 6
    ISSN: 1572-8986
    Keywords: Excimer laser ; parallel resistor network ; halogen attachment stability ; microinstability ; vibrational kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract The satbilit r of the pumping discharge for XeCI (Ne/Xe/HCI) lasers is investigated by using different one-dimensional models, considering both bulk discharge instabilities and filamentary ones. It is found that the bulk stability in a XeCl laser discharge can he improved, under certain conditions, due to the vihrational excitation of HCl molecules: this effect is studied by using different models for the HCl vihrational kinetics. It is established that the very short instability time found in experiments cannot he explained as a result of hulk instability of the discharge. On the other hand, a satisfactory comparison with experiments can he obtained by adding to the model a simplified microinstability which develops in the discharge.
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  • 7
    ISSN: 1562-6938
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is commonly accepted that, as the current increases, a diffuse negative corona inevitably goes over to a strongly nonuniform and nonsteady spark discharge. In this paper, a new effect—the transition of a negative corona to a diffuse glow discharge at atmospheric pressure—is studied experimentally and numerically. The evolution of the corona parameters during the transition to the regime of a glow discharge is traced.
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  • 8
    ISSN: 1562-6938
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The breakdown of oxygen in a dc electric field is studied. A high concentration of oxygen molecules in the a 1Δg excited state is obtained in a purely chemical reactor. A decrease in the breakdown voltage at degrees of excitation exceeding 50% is observed. The theoretical decrement in the breakdown voltage obtained by solving the Boltzmann equation is in good agreement with the experimental data.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics 5 (1969), S. 92-97 
    ISSN: 1573-8191
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied mechanics and technical physics 27 (1986), S. 318-321 
    ISSN: 1573-8620
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The description of many physical systems comes down to the solution of a system of two nonlinear equations of the parabolic type. Such systems can be the electron-hole plasma of a semiconductor and a weakly ionized gas plasma, nonequilibrium superconductors, as well as a number of chemical and biological objects, the properties of which are determined by autocatalytic reactions. The formation of complicated nonuniform structures occurs upon the loss of stability in these systems. We shall examine the concrete problem of the development of an ionization-superheating instability in a self-maintained discharge, described by the equation of charged-particle balance of the plasma and the equation of heat balance. The mechanism of this stability is connected with the decrease in the density of gas escaping at constant pressure from a superheated region, and with the rise in electron temperature occurring as a consequence of this (see, e.g., [1]). Self-similar functions for the local values of the charged-particle density and the gas temperature, being solutions of the corresponding balance equations, are of interest for the understanding of the nonlinear state of this process. An ionization-superheating instability in a high-frequency field and a self-similar solution, describing the explosive development of conductivity in a constricting discharge, neglecting the thermal conductivity of the gas and charge recombination, were studied in [2]. Self-similar solutions of a pair of equations of the parabolic type under the conditions of a self-maintained glow discharge are investigated in the present paper. The solutions obtained can be of interest for a whole series of physical systems.
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