Electric field microfluctuations on the shock front in the model experiments

Details Electric field microfluctuations on the shock front in the model experiments Electric field microfluctuations on the shock front in the model experiments

Sep 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ap%26ss..24..245p&link_type=abstract

Astrophysics and Space Science, Volume 24, Issue 1, pp.245-257

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

Fluctuations of the electric and magnetic field are studied in collisionless shock formed during plasma flow over a terrella. Spectra of magnetic fluctuations in the laboratory experiment and in space appear to coincide in dimensionless units. Electric field fluctuations appear at the shock wave formation, with frequencies in the hybrid Larmor frequency range. The appearance of noise is preceeded by the formation of positive potential maxima. The reflection of ions from the potential maxima must lead to two stream motion in a plasma with magnetized electrons. Such motion is unstable and excites longitudinal waves. Dissipation of energy of the directional motion after damping of electrical noises apparently occurs only through microfluctuations of the magnetic field.

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