Electromagnetic zonal flow residual responses

Peter J. Catto, Felix I. Parra, István Pusztai

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The collisionless axisymmetric zonal flow residual calculation for a tokamak plasma is generalized to include electromagnetic perturbations. We formulate and solve the complete initial value zonal flow problem by retaining the fully self-consistent axisymmetric spatial perturbations in the electric and magnetic fields. Simple expressions for the electrostatic, shear and compressional magnetic residual responses are derived that provide a fully electromagnetic test of the zonal flow residual in gyrokinetic codes. Unlike the electrostatic potential, the parallel vector potential and the parallel magnetic field perturbations need not relax to flux functions for all possible initial conditions.

Original languageEnglish (US)
Article number905830402
JournalJournal of Plasma Physics
Issue number4
StatePublished - Aug 1 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


  • fusion plasma
  • magnetized plasmas
  • plasma dynamics


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