Synchrotron radiation from a runaway electron distribution in tokamaks

A. Stahl, M. Landreman, G. Papp, E. Hollmann, T. Fülöp

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The synchrotron radiation emitted by runaway electrons in a fusion plasma provides information regarding the particle momenta and pitch-angles of the runaway electron population through the strong dependence of the synchrotron spectrum on these parameters. Information about the runaway density and its spatial distribution, as well as the time evolution of the above quantities, can also be deduced. In this paper, we present the synchrotron radiation spectra for typical avalanching runaway electron distributions. Spectra obtained for a distribution of electrons are compared with the emission of mono-energetic electrons with a prescribed pitch-angle. We also examine the effects of magnetic field curvature and analyse the sensitivity of the resulting spectrum to perturbations to the runaway distribution. The implications for the deduced runaway electron parameters are discussed. We compare our calculations to experimental data from DIII-D and estimate the maximum observed runaway energy.

Original languageEnglish
Article number093302
JournalPhysics of Plasmas
Volume20
Issue number9
DOIs
Publication statusPublished - Sep 2013

Fingerprint

electron distribution
synchrotron radiation
pitch (inclination)
radiation spectra
spatial distribution
synchrotrons
electrons
fusion
curvature
momentum
perturbation
sensitivity
estimates
magnetic fields
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Synchrotron radiation from a runaway electron distribution in tokamaks. / Stahl, A.; Landreman, M.; Papp, G.; Hollmann, E.; Fülöp, T.

In: Physics of Plasmas, Vol. 20, No. 9, 093302, 09.2013.

Research output: Contribution to journalArticle

Stahl, A. ; Landreman, M. ; Papp, G. ; Hollmann, E. ; Fülöp, T. / Synchrotron radiation from a runaway electron distribution in tokamaks. In: Physics of Plasmas. 2013 ; Vol. 20, No. 9.
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