Ballooning-mode theory of trapped-electron instabilities in tokamaks

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Abstract

Employing the ballooning-mode formalism, the two-dimensional eigenmode equation for trapped-electron instabilities in tokamaks is reduced to a one-dimensional integro-differential equation along the magnetic field lines and then analysed both analytically and numerically. Dominant toroidal coupling effects are due to ion magnetic drifts which create quasi-bound states. The trapped-electron response can be treated as a perturbation and is found to de-stabilize the quasi-bound states.

Original languageEnglish
Pages (from-to)403-408
Number of pages6
JournalNuclear Fusion
Volume21
Issue number3
DOIs
Publication statusPublished - 1981 Jan 1

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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