Temporal and spectral evolution of runaway electron bursts in TEXTOR disruptions

Journal Article · Sat Sep 15 04:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4755787· OSTI ID:22086144

Forster, M; Finken, K H; Kudyakov, T; Willi, O ^[1]; Lehnen, M ^[2]; Xu, Y ^[3]; Zeng, L ^[2]

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1. Institut fuer Laser- und Plasmaphysik, Heinrich-Heine-Universitaet Duesseldorf, Universitaetsstr. 1, 40225 Duesseldorf (Germany)
2. Institut fuer Energie- und Klimaforschung, Forschungszentrum Juelich GmbH, EURATOM Association, 52425 Juelich (Germany)
3. Laboratory for Plasma Physics, Ecole Royale Militaire-Koninklijke Militaire School, Avenue de la Renaissance 30, 1000 Brussels (Belgium)

Novel observations of the burst-like runaway electron losses in tokamak disruptions are reported. The runaway bursts are temporally resolved and first-time measurements of the corresponding runaway energy spectra are presented. A characteristic shape and burst to burst changes of the spectra are found. The runaway energy content of the disruptions and the conversion of the predisruptive magnetic energy are estimated. The radial decay of the runaways can be approximated by an exponential distribution. Deriving from the measurements, resistive tearing modes or kink modes are suggested to trigger the formation of the bursts.

• OSTI ID: 22086144
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ENERGY SPECTRA
KINK INSTABILITY
PARTICLE DECAY
RUNAWAY ELECTRONS
TEARING INSTABILITY
TEXTOR TOKAMAK
TIME MEASUREMENT
TIME RESOLUTION