Islands of runaway electrons in the TEXTOR tokamak and relation to transport in a stochastic field

Journal Article · Mon Jun 27 04:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.4093· OSTI ID:7179814

Jaspers, R; Lopes Cardozo, N J; Finken, K H; Schokker, B C; Mank, G; Fuchs, G; Schueller, F C ^[1]

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1. FOM-Instituut voor Plasmafysica Rijnhuizen,'' P.O. Box 1207, 3402 BE Nieuwegein (Netherlands) Institut fuer Plasmaphysik, Forschungszentrum Juelich, D-52425 Juelich (Germany)

A population of 30 MeV runaway electrons in the TEXTOR tokamak is diagnosed by their synchrotron emission. During pellet injection a large fraction of the population is lost within 600 [mu]s. This rapid loss is attributed to stochastization of the magnetic field. The remaining runaways form a narrow, helical beam at the [ital q]=1 drift surface. The radial and poloidal diffusion of this beam is extremely slow, [ital D][lt]0.02 m[sup 2]/s. The fact that the beam survives the period of stochastic field shows that in the chaotic sea big magnetic islands must remain intact.

• OSTI ID: 7179814
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:26; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
BREMSSTRAHLUNG
CLOSED PLASMA DEVICES
CONFIGURATION
DATA
DEUTERIUM
DIFFUSION
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
FUEL PELLETS
HELICAL CONFIGURATION
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LEPTONS
LIGHT NUCLEI
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELDS
MAGNETIC ISLANDS
MEAN FREE PATH
MEV RANGE
MEV RANGE 10-100
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
PELLET INJECTION
PELLETS
PLASMA
PLASMA DIAGNOSTICS
RADIATIONS
RUNAWAY ELECTRONS
STABLE ISOTOPES
STOCHASTIC PROCESSES
SYNCHROTRON RADIATION
TEXTOR TOKAMAK
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE