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Synchrotron radiation from a runaway electron distribution in tokamaks

Adam Stahl (Institutionen för teknisk fysik, Nukleär teknik) ; Matt Landreman ; Gergely Papp (Institutionen för teknisk fysik, Nukleär teknik) ; Eric Hollmann ; Tünde Fülöp (Institutionen för teknisk fysik, Nukleär teknik)
Physics of Plasmas (1070-664X). Vol. 20 (2013), 9, p. 093302.
[Artikel, refereegranskad vetenskaplig]

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.



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Denna post skapades 2013-09-20. Senast ändrad 2016-04-28.
CPL Pubid: 183720

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)

Ämnesområden

Energi
Plasmafysik
Fusion
Plasmafysik med fusion

Chalmers infrastruktur

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Synchrotron radiation from runaway electrons in plasmas