Runaway electron losses caused by resonant magnetic perturbations in ITER
Journal article, 2011

Disruptions in large tokamaks can lead to the generation of a relativistic runaway electron beam that may cause serious damage to the first wall. To suppress the runaway beam the application of resonant magnetic perturbations (RMPs) has been suggested. In this work we investigate the effect of RMPs on the confinement of runaway electrons by simulating their drift orbits in magnetostatic perturbed fields and calculating the transport and orbit losses for various initial energies and different magnetic perturbation configurations. In the simulations we model the ITER RMP configuration and solve the relativistic, gyro-averaged drift equations for the runaway electrons including a time-dependent electric field, radiation losses and collisions. The results indicate that runaway electrons are rapidly lost from regions where the normalized perturbation amplitude δB/B is larger than 0.1% in a properly chosen perturbation geometry. This applies to the region outside the radius corresponding to the normalized toroidal flux ψ = 0.5.

disruption mitigation

fusion plasma physics

runaway electron

tokamak

Author

Gergely Papp

Chalmers, Applied Physics, Nuclear Engineering

Michael Drevlak

Max Planck Institute

Tünde Fülöp

Chalmers, Applied Physics, Nuclear Engineering

Per Helander

Max Planck Institute

Gergö Pokol

Budapest University of Technology and Economics

Plasma Physics and Controlled Fusion

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

Vol. 53 9 095004-

Driving Forces

Sustainable development

Areas of Advance

Energy

Roots

Basic sciences

Subject Categories

Fusion, Plasma and Space Physics

DOI

10.1088/0741-3335/53/9/095004

More information

Latest update

3/19/2018