Periodic energization of electrons due to electromagnetic waves propagating through magnetoplasma—I

Abstract

Interaction of streaming electrons and low frequency electromagnetic waves, both confined to a geomagnetic tube of force, has been studied, following Roberts and Buchsbaum’s theory it is shown that, electron energy gain is oscillatory. Considering low energy (<;10ev) electrons the time period of energy oscillation is found to be maximum at the equator for ω≤l5kHz. and increases with increasing frequency. For 15≤ω≤100kHz, the maximum time period of energy oscillation is found to be almost constant (5.3×10−2 sec) in the entire band of frequencies. The maximum time period shifts towards higher latitude with increasing frequencies, whereas, for high energy (l00kev) electrons the: time period of energy oscillation increases with the increasing latitude and at high latitude (65°) the time period is almost constant (0⋅98×10−2sec) for waves of different frequencies. The energy gain is found to increase steadily with increasing latitude. Observed periodic geophysical phenomena have been interpreted in terms of calculated results and their significance has been discussed. © 1971, Taylor and Fancis Group, LLC.