THE WAKE OF A CHARGE PARTICLE MOVING THROUGH A PLASMA WITH MAGNETIC FIELD Technical REPORT 401
Technical Report
·
OSTI ID:4743595
ABS>The motion of a charged particle through a low-density electron plasma placed in an external constant magnetic field was investigated by using transport equations. The inotion of the particle in the direction of the applied magnetic field is considered in some detail; the particles moving at right angles to the magnetic field are considered very briefly. The charge density developed in the medium as a result of interaction of the medium with the moving particle through long-range Coulomb force is evaluated for the wavelength, is preferred d , which is such that R > is preferred d > is preferred d /sub D/, where R is the distance from the moving particle, and is preferred d /sub D/, the Debye wavelength. Three types of charge-density waves were found to be associated with the moving test particle. One is a plasma electron'' wave that exists only for velocities of the test particle that are greater than the average thermal speed of the plasma electron; this wave also shows a Mach cone distribution. The second is an elliptically shaped extra-ordinary'' electromagnetic wave that exists for all velocities of the test particle, and is coupled to the plasma electron wave. The third is an almost spherical weak wave associated with the ordinary electromagnetic wave. This third wave is not coupled to the other waves within the range of approximation considered here, and it goes over to an exponentially decreasing charge distribution in the limit of very small magnetic field. (auth)
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge. Research Lab. of Electronics
- NSA Number:
- NSA-16-033929
- OSTI ID:
- 4743595
- Report Number(s):
- NP-12131
- Country of Publication:
- United States
- Language:
- English
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