Excitation Of Plasma Resonances By A Small Pulsed Dipole

Download or read book Excitation of Plasma Resonances by a Small Pulsed Dipole written by W. D. DEERING and published by . This book was released on 1965 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The space and time dependence of decaying resonant oscillations excited in a collisionless plasma by an infinitesimally small pulsed dipole is determined, first in the absence and then in the presence of an external magnetic field. In the presence of a magnetic field only the 'quasi-electrostatic' resonances are treated. These occur at the plasma frequency, the electron cyclotron frequency F, the upper hybrid frequency, the lower hybrid resonant frequencies and at the frequencies nF where n is a positive integer. The quasi-electrostatic approximation is used in the treatment of these resonances; the limits of its validity are examined in some detail for the upper hybrid frequency resonance. No similar approximations are made for plasma oscillations in the absence of a magnetic field; the more accurate results so obtained differ little from those derived with the aid of the quasi-electrostatic approximation, within the region of interest.