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Radiation from a moving point charge in a drifting anisotropic plasma
Author(s) -
Yasumoto Kiyotoshi
Publication year - 1983
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs018i002p00207
Subject(s) - physics , plasma , radiation , magnetic field , electromagnetic radiation , cyclotron radiation , point source , anisotropy , computational physics , waves in plasmas , optics , cyclotron , quantum mechanics
The radiation from a moving point charge in an anisotropic cold plasma drifting uniformly along a finite external magnetic field is investigated. It is assumed that the charge is moving uniformly in the direction of the external magnetic field. In general, the radiation consists of two waves, i.e., the ordinary and extraordinary waves. The effects of the drift motion of the background plasma on the radiation characteristics of both waves are discussed in detail. It is found that as the drift velocity of the plasma increases and approaches that of the moving source, the radiated energy of the ordinary wave is resonantly enhanced and the Cerenkov ray becomes concentrated in the direction of the motion of the source.