Unstable universal drift eigenmodes in toroidal plasmas

C. Z. Cheng, Liu Chen

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


The eigenmode equation describing ballooning collisionless drift instabilities is analyzed both analytically and numerically. A new branch of eigenmodes, which corresponds to quasi-bound states due to toroidal coupling effects such as ion ∇B drifts, is shown to be destabilized by electron Landau damping for typical tokamak parameters. This branch cannot be understood by the strong coupling approximation. However, the slab-like (Pearlstein-Berk-type) branch is found to remain stable and experience enhanced shear damping.

Original languageEnglish
Pages (from-to)1770-1773
Number of pages4
JournalPhysics of Fluids
Issue number9
Publication statusPublished - 1980

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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