Radiation reaction induced non-monotonic features in runaway electron distributions

Hirvijoki, Eero, 1985 (author): Chalmers tekniska högskola,Chalmers University of Technology

Pusztai, Istvan, 1983 (author): Chalmers tekniska högskola,Chalmers University of Technology

Decker, Joan, 1977 (author): Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL)

Embréus, Ola, 1991 (author): Chalmers tekniska högskola,Chalmers University of Technology

Stahl, Adam, 1985 (author): Chalmers tekniska högskola,Chalmers University of Technology

Fülöp, Tünde, 1970 (author): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

2015
2015
English.
In: Journal of Plasma Physics. - 0022-3778 .- 1469-7807. ; 81:5, s. 475810502-

Related links:: http://dx.doi.org/10...; show more...; https://research.cha...; https://doi.org/10.1...; show less...

Abstract Subject headings

Runaway electrons, which are generated in a plasma where the induced electric field exceeds acertain critical value, can reach very high energies in the MeV range. For such energetic electrons,radiative losses will contribute significantly to the momentum space dynamics. Under certainconditions, due to radiative momentum losses, a non-monotonic feature – a “bump” – can formin the runaway electron tail, creating a potential for bump-on-tail-type instabilities to arise. Herewe study the conditions for the existence of the bump. We derive an analytical threshold conditionfor bump appearance and give an approximate expression for the minimum energy at which thebump can appear. Numerical calculations are performed to support the analytical derivations.

By the author/editor: Hirvijoki, Eero, ...; Pusztai, Istvan, ...; Decker, Joan, 19 ...; Embréus, Ola, 19 ...; Stahl, Adam, 198 ...; Fülöp, Tünde, 19 ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Fusion Plasma an ...

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