Evolution of the wave number range during the development of the drift instability
The dispersion relation of the drift waves is studied in the presence of a fluctuating electric field consisting of a superposition of small amplitude, linear, independent drift waves. It is shown that a stabilisation effect appears due to the perturbation of particle trajectories, consisting of the partial destruction of the small clumps. A transient process during the increase of the drift instability is revealed. It leads to a stabilisation of waves with the largest wave numbers, before reaching the final nonlinear stage.
Bibliographic Reference: Report: EUR-CEA-FC 1480 EN (1993) 26 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199311125 / Last updated on: 1994-11-29
Original language: en
Available languages: en