Journal Article

PreJuSER-45531

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Scale size of magnetic turbulence in tokamaks probed with 30 MeV electrons

Entrop, I. ; Lopes Cardozo, N. J. ; Jaspers, R. ; Finken, K. H.FZJ*

2000
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/2323

Abstract: Measurements of synchrotron radiation emitted by 30-MeV runaway electrons in the TEXTOR-94 tokamak show that the runaway population decays after switching on neutral beam injection (NBI). The decay starts only with a significant delay, which decreases with increasing NBI heating power. This delay provides direct evidence of the energy dependence of runaway confinement, which is expected if magnetic modes govern the loss of runaways. Application of the theory by Mynick and Strachan [Phys. Fluids 24, 695 (1981)] yields estimates for the "mode width" (delta) of magnetic perturbations: delta < 0.5 cm in Ohmic discharges, increasing to delta = 4.4 cm for 0.6 MW NBI.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institutsbereich I (IPP-1)
2. Institutsbereich II (IPP-2)

Research Program(s):

1. Apparative Methoden zum Teilchenkreislauf und zur Leistungsauskopplung (22.73.5)
2. TEC-FOM (TEC-FOM)

Appears in the scientific report 2000
Notes: This version is available at the following Publisher URL: http://prl.aps.org

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