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Scintillations in a magnetized plasma. Part 2. The fourth-order moment

  • D. B. Melrose (a1)
Abstract

The theory of strong scintillations in a weakly anisotropic plasma is used to derive an equation satisfied by the correlation functions for the Stokes parameters. The coefficients that describe these correlation functions are determined explicitly in terms of a matrix generalization of the standard phasestructure function. In discussing implications of the theory, emphasis is placed on terms that have no counterpart in an isotropic plasma. It is shown that the decay of the linear polarizaiton that results from differential Faraday rotation is different in the mean squares and the square means of the Stokes parameters. In principle, this allows one to determine properties relating to the fluctuations of the magnetic field along the ray path. A formal treatment of polarization dependent intensity fluctuations in a magnetized plasma is presented and discussed briefly.

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A. Ishimaru 1978 Wave Propagation and Scattering in Random Media. Vol. 2. Multiple Scattering, Turbulence, Rough Surfaces, and Remode Sensing. Academic.

A. M. Prokhorov , F. V. Bunkin , K. S. Gochelashvily & V. I. Shishov 1975 Proc. IEEE 63, 790.

V. H. Rumsey 1975 Radio Sci. 10, 107.

S. R. Spangler 1982 Astrophys. J. 261, 310.

V. I. Tatarski & V. U. Zavorotnyi 1980 Prog. Optics 18, 204.

B. J. Uscinski 1982 Proc. R. Soc. Lond. A 380, 137.

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Journal of Plasma Physics
  • ISSN: 0022-3778
  • EISSN: 1469-7807
  • URL: /core/journals/journal-of-plasma-physics
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