Global anomalous transport of ICRH and NBI-heated fast ions
Journal article, 2017

By taking advantage of the trace approximation, one can gain an enormous computational advantage when solving for the global turbulent transport of impurities. In particular, this makes feasible the study of non-Maxwellian transport coupled in radius and energy, allowing collisions and transport to be accounted for on similar time scales, as occurs for fast ions. In this work, we study the fully-nonlinear ITG-driven trace turbulent transport of locally heated and injected fast ions. Previous results indicated the existence of MeV-range minorities heated by cyclotron resonance, and an associated density pinch e ect. Here, we build upon this result using the t3core code to solve for the distribution of these minorities, consistently including the e ects of collisions, gyrokinetic turbulence, and heating. Using the same tool to study the transport of injected fast ions, we contrast the qualitative features of their transport with that of the heated minorities. Furthermore, we move beyond the trace approximation to develop a model which allows one to easily account for the reduction of anomalous transport due to the presence of fast ions in electrostatic turbulence.

Gyrokinetics

Cyclotron resonance

Turbulence Fast ions

Microturbulence

Cyclotrons

transport

non-Maxwellian

Particle beam injection

Author

George Wilkie

Chalmers, Physics, Subatomic and Plasma Physics

Istvan Pusztai

Chalmers, Physics, Subatomic and Plasma Physics

Ian Abel

Chalmers, Physics, Subatomic and Plasma Physics

William D. Dorland

University of Maryland

Tünde Fülöp

Chalmers, Physics, Subatomic and Plasma Physics

Plasma Physics and Controlled Fusion

0741-3335 (ISSN) 1361-6587 (eISSN)

Vol. 59 4 044007-

Driving Forces

Sustainable development

Areas of Advance

Energy

Roots

Basic sciences

Subject Categories

Fusion, Plasma and Space Physics

DOI

10.1088/1361-6587/aa5902

More information

Created

10/8/2017