Neoclassical Pitch-Angle Scattering of Runaway Electrons

Abstract

It is discovered that the tokamak field geometry generates a pitch-angle scattering effect for runaway electrons. This neoclassical pitch-angle scattering is much stronger than the collisional scattering and invalidates the gyro-center model for runaway electrons. As a result, the energy limit of runaway electrons is found to be larger than the prediction of the gyro-center model and to depend heavily on the background magnetic field.

References in corpus (1)

• Test-particle acceleration in a hierarchical three-dimensional turbulence model

Cited by in corpus (5)

• Multi-scale Full-orbit Analysis on Phase-space Behavior of Runaway Electrons in Tokamak Fields with Synchrotron Radiation
• Lorentz Covariant Canonical Symplectic Algorithms for Dynamics of Charged Particles
• Explicit symplectic algorithms based on generating functions for relativistic charged particle dynamics in time-dependent electromagnetic field
• The Accurate Particle Tracer Code
• Simulating Pitch Angle Scattering Using An Explicitly Solvable Energy Conserving Algorithm