Astronomy and Astrophysics – Astronomy
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...606.1200d&link_type=abstract
The Astrophysical Journal, Volume 606, Issue 2, pp. 1200-1209.
Astronomy and Astrophysics
Astronomy
1
Magnetic Fields, Sun: Solar Wind, Turbulence
Scientific paper
Cosmic rays impacting a spacecraft have already passed through and interacted with the turbulent solar wind surrounding the spacecraft; therefore, they carry information on the three-dimensional structure of the turbulence. In particular, the simple, unlagged correlation between the magnetic fluctuations and fluctuations of the cosmic-ray flux can potentially provide unique information on the detailed nature of interplanetary magnetic turbulence. Starting with the Vlasov equation, subject to the usual quasi-linear approximations, we derive the leading-order approximation of the particle-field correlation for generalized axisymmetric turbulence geometry in a plasma flowing in an arbitrary direction with respect to the average magnetic field. This work presents the theoretical basis for interpreting future measurements of the particle-field correlation in the real solar wind. As an example, we apply the theory to mirror-symmetric magnetostatic slab turbulence and clearly show the effect of the fluctuating convection electric field.
Bieber John W.
de Koning Curt A.
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