Collisionless Shock Wave in a Plasma

概要

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An analysis is developed by the extension of Morawetz's method. One of the assumptions which is different from Morawetz's is the following; the ion and the electron have the same temperatures at x = -∞, in the uniform flow at far upstream. The analysis shows that the shock thickness is of order of the geometric mean of the gyroradii of the ion and the electron at x = -∞. Inside the shock, an electric field is induced by charge separation. This field causes the drift of electrons along the shock surface. Current by this drift of electrons increases the intensity of the magnetic field. Some of ions are expected to bounce many times at the front of the shock because of the existence of the electric field induced by the charge separation. As a result, they are expected to have large velocities in the neighborhood of the shock. These bouncing ions contribute to produce asymmetric fields before and after the shock wave.
社団法人日本物理学会の論文
1967-08-05