Accession Number:

AD0619888

Title:

RADIATION BY A UNIFORMLY ROTATING LINE CHARGE IN A PLASMA

Descriptive Note:

Interim rept.

Corporate Author:

POLYTECHNIC INST OF BROOKLYN NY DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s):

Report Date:

1965-06-01

Pagination or Media Count:

77.0

Abstract:

A theoretical investigation is conducted for the radiation produced by a linear distribution of electric charge executing circular motion both inside and outside a cylindrical plasma column. The analysis includes the effects of compressibility and anisotropy of the plasma upon the radiation characteristics of the charge distribution. In the incompressible isotropic case, a dipole resonance phenomenon is exhibited for the first harmonic of the angular frequency of rotation of the charge when the charge moves at non- relativistic velocities. If the chargemoves at extremely small velocities, the resonance becomes a singularity. The influence of compressibility upon these radiation characteristics is discussed and is shown to be negligible. In the case of the presence of a magnetic field, i.e. for an anisotropic plasma, the dipole resonance is shifted. Moreover, a multipole resonance is possible for a sufficiently higher order harmonic. Furthermore, in a frequency range just above this multipole resonance, Cerenkov radiation contributes to the existent Bremsstahlung radiation for a single harmonic in the neighborhood of the singularity of the index of refraction. Thereafter, the radiation contributions of the remaining harmonics is negligible.

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE