Comment on "Electromagnetic Global Gyrokinetic Simulation of Shear Alfven Wave Dynamics in Tokamak Plasmas" [Phys. Plasmas 14, 042503 (2007)]
Abstract
This comment clarifies the relation of the research in a recently published article [Phys. Plasmas 14, 042503 (2007)] to other prior publications addressing the inclusion of electromagnetic and drift-kinetic electron physics in gyrokinetic simulation, raises a concern related to the inclusion of kinetic electrons in a system with magnetic shear, and discusses alternatives in the face of an important limitation on the general applicability of the algorithm described therein.
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