Runaway electron synchrotron radiation in a vertically translated plasma
Artikel i vetenskaplig tidskrift, 2020

Synchrotron radiation observed from runaway electrons (REs) in tokamaks depends upon the position and size of the RE beam, the RE energy and pitch distributions, as well as the location of the observer. We show experimental synchrotron images of a vertically moving RE beam sweeping past the detector in the Tokamak a Configuration Variable (TCV) tokamak and compare it with predictions from the synthetic synchrotron diagnosticSoft. This experimental validation lends confidence to the theory underlying the synthetic diagnostics which are used for benchmarking theoretical models of and probing runaway dynamics. We present a comparison of synchrotron measurements in TCV with predictions of kinetic theory for runaway dynamics in uniform magnetic fields. We find that to explain the detected synchrotron emission, significant non-collisional pitch angle scattering as well as radial transport of REs would be needed. Such effects could be caused by the presence of magnetic perturbations, which should be further investigated in future TCV experiments.

runaway electrons




synchrotron radiation


Mathias Hoppe

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

G. Papp


T. Wijkamp

FOM Institute DIFFER

Technische Universiteit Eindhoven

A. Perek

FOM Institute DIFFER

J. Decker

Ecole Polytechnique Federale De Lausanne

B. Duval

Ecole Polytechnique Federale De Lausanne

Ola Embréus

Chalmers, Fysik, Subatomär fysik och plasmafysik

Tünde Fülöp

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

U. A. Sheikh

Ecole Polytechnique Federale De Lausanne

Nuclear Fusion

0029-5515 (ISSN)

Vol. 60 9 094002


Acceleratorfysik och instrumentering

Subatomär fysik

Fusion, plasma och rymdfysik



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