5 research outputs found

    On a criterion for determining the complete continuity of Urysohn's integral operator

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    Nonlinear operator for determining complete continuity when kernel is function of variable

    Electrical conductivity of plasmas of DB white dwarf atmospheres

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    The static electrical conductivity of non-ideal, dense, partially ionized helium plasma was calculated over a wide range of plasma parameters: temperatures 1104KT1105K1\cdot 10^{4}\textrm{K} \lesssim T \lesssim 1\cdot 10^{5}\textrm{K} and mass density 1×106g/cm3ρ2g/cm31 \times 10^{-6} \textrm{g}/\textrm{cm}^{3} \lesssim \rho \lesssim 2 \textrm{g}/\textrm{cm}^{3}. Calculations of electrical conductivity of plasma for the considered range of plasma parameters are of interest for DB white dwarf atmospheres with effective temperatures 1104KTeff3104K1\cdot 10^{4}\textrm{K} \lesssim T_{eff} \lesssim 3\cdot 10^{4}\textrm{K}. Electrical conductivity of plasma was calculated by using the modified random phase approximation and semiclassical method, adapted for the case of dense, partially ionized plasma. The results were compared with the unique existing experimental data, including the results related to the region of dense plasmas. In spite of low accuracy of the experimental data, the existing agreement with them indicates that results obtained in this paper are correct

    Measurement of the Velocity of Particles Emerging from a Plasma Flame by High-Speed Cine-Streak Photography

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