Contained modes in mirrors with sheared rotation

Abraham J. Fetterman, Nathaniel J. Fisch

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In mirrors with E×B rotation, a fixed azimuthal perturbation in the laboratory frame can appear as a wave in the rotating frame. If the rotation frequency varies with radius, the plasma-frame wave frequency will also vary radially due to the Doppler shift. A wave that propagates in the high rotation plasma region might therefore be evanescent at the plasma edge. This can lead to radially localized Alfven eigenmodes with high azimuthal mode numbers. Contained Alfven modes are found both for peaked and nonpeaked rotation profiles. These modes might be useful for alpha channeling or ion heating, as the high azimuthal wave number allows the plasma wave frequency in the rotating frame to exceed the ion cyclotron frequency.

Original languageEnglish (US)
Article number112508
JournalPhysics of Plasmas
Volume17
Issue number11
DOIs
StatePublished - Nov 1 2010

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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