Limitations, insights and improvements to gyrokinetics

Peter J. Catto, Felix I. Parra, Grigory Kagan, Andrei N. Simakov

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We first consider gyrokinetic quasineutrality limitations when evaluating the axisymmetric radial electric field in a non-turbulent tokamak by an improved examination of intrinsic ambipolarity. We next prove that the background ions in a pedestal of poloidal ion gyroradius scale must be Maxwellian and nearly isothermal in Pfirsch-Schlüter and banana regime tokamak plasmas, and then consider zonal flow behaviour in a pedestal. Finally, we focus on a simplifying procedure for our transport time scale hybrid gyrokinetic-fluid treatment that removes the limitations of gyrokinetic quasineutrality and remains valid in the pedestal.

Original languageEnglish (US)
Article number095026
JournalNuclear Fusion
Issue number9
StatePublished - 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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