1. Home page
  2. Search

The influence of the self-consistent mode structure on the coriolis pinch effect

This item is provided by the institution :
National Technical University of Athens   

Repository :
Digital Library of National Technical University of Athens | Dspace@NTUA   

see the original item page
in the repository's web site and access all digital files if the item*



The influence of the self-consistent mode structure on the coriolis pinch effect (EN)
Snodin, AP (EN)
Casson, FJ (EN)
Camenen, Y (EN)
Angioni, C (EN)
Strintzi, D (EN)
Peeters, AG (EN)
Hornsby, WA (EN)
journalArticle (EN)
2014-03-01T01:32:10Z
2009 (EN)
This paper discusses the effect of the mode structure on the Coriolis pinch effect [A. G. Peeters, C. Angioni, and D. Strintzi, Phys. Rev. Lett. 98, 265003 (2007)]. It is shown that the Coriolis drift effect can be compensated for by a finite parallel wave vector, resulting in a reduced momentum pinch velocity. Gyrokinetic simulations in full toroidal geometry reveal that parallel dynamics effectively removes the Coriolis pinch for the case of adiabatic electrons, while the compensation due to the parallel dynamics is incomplete for the case of kinetic electrons, resulting in a finite pinch velocity. The finite flux in the case of kinetic electrons is interpreted to be related to the electron trapping, which prevents a strong asymmetry in the electrostatic potential with respect to the low field side position. The physics picture developed here leads to the discovery and explanation of two unexpected effects: First the pinch velocity scales with the trapped particle fraction (root of the inverse aspect ratio), and second there is no strong collisionality dependence. The latter is related to the role of the trapped electrons, which retain some symmetry in the eigenmode, but play no role in the perturbed parallel velocity. © 2009 American Institute of Physics. (EN)
Physics, Fluids & Plasmas (EN)
Low-field sides (EN)
Collisionality (EN)
Magnetohydrodynamics (EN)
Plasma theory (EN)
Eigen modes (EN)
Toroidal geometry (EN)
pinch effect (EN)
Coriolis (EN)
Aspect ratio (EN)
Pinch velocity (EN)
Electron traps (EN)
perturbation theory (EN)
Electron trapping (EN)
Wave vector (EN)
Electrostatic potentials (EN)
Gyrokinetic simulations (EN)
plasma toroidal confinement (EN)
Pinch effect (EN)
Tokamak devices (EN)
Velocity (EN)
plasma simulation (EN)
Trapped electrons (EN)
Drift effects (EN)
Mode structure (EN)
Inverse aspect ratio (EN)
Kinetic electrons (EN)
drift instability (EN)
Trapped particle (EN)
Electrons (EN)
Physics of Plasmas (EN)
English
AMER INST PHYSICS (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
Ιδρυματικό Αποθετήριο
Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά



*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)