Fast ion-driven Bernstein instabilities

研究成果: Article同行評審

15 引文 斯高帕斯(Scopus)

摘要

A novel instability concept, namely, a two-streaming process in gyrospace, is investigated. This leads to a two-energy-stream cyclotron instability even without beams in real space, where fast ions drive electrostatic ion Bernstein waves unstable. The instability comes from the coupling of the fast and slow ion Bernstein branches due to a weak relativistic effect. When an unstable condition is satisfied, the growth rate of the cubic instability is proportional to (nf/ns) 1 3f-1) 1 3 while the efficiency ∝ (nf/ns) 1 3f-1) -2 3. A quadratic instability dominates high harmonics at the lower-hybrid frequency regime and its growth rate has no γf-1 dependence. The mechanism may play an important role in the interaction and dynamics of fast ions in magnetized plasmas.

原文English
頁(從 - 到)308-314
頁數7
期刊Physics Letters A
181
發行號4
DOIs
出版狀態Published - 1993 十月 18

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)

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