9-13 July 2012
Beam-generated electrostatic instabilities in two-electron temperature space plasmas
Presented by Mr. Lifa MBULI on 12 Jul 2012 from 11:20 to 11:40
Type: Oral Presentation
Session: Space Science
Track: Track D2 - Space Science
Using kinetic theory, beam-generated wave instabilities are investigated in a four-component plasma composed of drifting warm electrons (magnetic field-aligned), hot and cool electrons, and background ions. All species are fully magnetized. A number of instabilities such as the electron acoustic, modified two-stream and electron beam resonant instability are found to be supported. The dependence of the growth rate and real frequency on plasma parameters such as electron beam speed, particle density and temperature, magnetic field strength, wave propagation angle, and temperature anisotropy of the electron beam is examined. It is found that the beam speed is crucial in determining which instability is excited.
Prof. Ramesh Bharuthram, email@example.com, University of the Western Cape