THE SINGLE PARTICLE AND COLLECTIVE DESCRIPTIONS OF THE ANOMALOUS DOPPLER RESONANCE AND THE ROLE OF ION DYNAMICS
The power j.E* dissipated by electrostatic waves interacting with a non-Maxwellian electron velocity distribution is considered. Its component terms illustrate the similarities and differences between collective and single particle treatments of the anomalous Doppler resonance. Examination of the large-k region of wavenumber space - in contrast to the well-known small-k region - shows that ion dynamics are important in stabilizing plasmas for which the electron velocity distribution considered alone is destabilizing. The sensitivity of theoretical descriptions to the choice of representation of the superthermal electron tail is examined analytically and numerically.
Bibliographic Reference: WRITE TO THE LIBRARIAN, UKAEA, CULHAM LABORATORY, ABINGDON, OXON OX14 3DB (UK), MENTIONING REPORT CLM-P 766, 1986
Record Number: 1989125021500 / Last updated on: 1987-02-01
Available languages: en