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**Harvard**

Papp, G., Drevlak, M., Fülöp, T., Helander, P. och Pokol, G. (2011) *Runaway electron losses enhanced by resonant magnetic perturbations*.

** BibTeX **

@conference{

Papp2011,

author={Papp, Gergely and Drevlak, M and Fülöp, Tünde and Helander, Per and Pokol, Gergö},

title={Runaway electron losses enhanced by resonant magnetic perturbations},

booktitle={Proceedings of 12th Technical Meeting on Energetic Particles in Magnetic Confinement Systems},

pages={O.26},

abstract={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 (RMP) has been suggested. In this work we investigate the effect of
resonant magnetic perturbations 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 use model configurations with
existing (TEXTOR) and planned (ITER) RMP systems, and solve the relativistic, gyro-averaged drift
equations for the runaway electrons including the electric field, radiation losses and collisions. The results
indicate that runaway electrons are well confined in the core of the device, but the onset time of runaway
losses closer to the edge is dependent on the magnetic perturbation level, which can thereby affect
the maximum runaway current. Runaway electrons are rapidly lost from regions where the normalised
perturbation amplitude \delta B/B is larger than 0.1% in a properly chosen perturbation geometry. This
applies to the region outside the radius corresponding to the normalised flux \psi = 0.5 in ITER, when the
ELM mitigation coils are used at maximum current in their most favourable configuration.},

year={2011},

}

** RefWorks **

RT Conference Proceedings

SR Electronic

ID 150465

A1 Papp, Gergely

A1 Drevlak, M

A1 Fülöp, Tünde

A1 Helander, Per

A1 Pokol, Gergö

T1 Runaway electron losses enhanced by resonant magnetic perturbations

YR 2011

T2 Proceedings of 12th Technical Meeting on Energetic Particles in Magnetic Confinement Systems

AB 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 (RMP) has been suggested. In this work we investigate the effect of
resonant magnetic perturbations 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 use model configurations with
existing (TEXTOR) and planned (ITER) RMP systems, and solve the relativistic, gyro-averaged drift
equations for the runaway electrons including the electric field, radiation losses and collisions. The results
indicate that runaway electrons are well confined in the core of the device, but the onset time of runaway
losses closer to the edge is dependent on the magnetic perturbation level, which can thereby affect
the maximum runaway current. Runaway electrons are rapidly lost from regions where the normalised
perturbation amplitude \delta B/B is larger than 0.1% in a properly chosen perturbation geometry. This
applies to the region outside the radius corresponding to the normalised flux \psi = 0.5 in ITER, when the
ELM mitigation coils are used at maximum current in their most favourable configuration.

LA eng

LK http://w3fusion.ph.utexas.edu/ifs/iaeaep/papers/s11-o26-papp-gergely-ep-paper.pdf

OL 30