Effect of plasma elongation on current dynamics during tokamak disruptions
Journal article, 2020

Plasma terminating disruptions in tokamaks may result in relativistic runaway electron beams with potentially serious consequences for future devices with large plasma currents. In this paper, we investigate the effect of plasma elongation on the coupled dynamics of runaway generation and resistive diffusion of the electric field. We find that elongated plasmas are less likely to produce large runaway currents, partly due to the lower induced electric fields associated with larger plasmas, and partly due to direct shaping effects, which mainly lead to a reduction in the runaway avalanche gain. © Cambridge University Press 2020.

runaway electrons

fusion plasma

Author

Tünde Fülöp

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Per Helander

Max Planck Society

Oskar Vallhagen

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Ola Embréus

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Linnea Hesslow

Chalmers, Physics, Subatomic and Plasma Physics

Pontus Svensson

Chalmers, Physics, Subatomic and Plasma Physics

A. Creely

Commonwealth Fusion Systems

Nathan T. Howard

Plasma Science and Fusion Center

P. Rodriguez-Fernandez

Plasma Science and Fusion Center

Journal of Plasma Physics

0022-3778 (ISSN) 1469-7807 (eISSN)

Vol. 86 1 474860101

Subject Categories

Fusion, Plasma and Space Physics

Other Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics

DOI

10.1017/S002237782000001X

More information

Latest update

2/10/2021