A study of runaway electron confinement in the ASDEX tokamak

Technical Report · Tue Mar 01 00:00:00 EST 1988

OSTI ID:5234061

Kwon, O J; Diamond, P H; Wagner, F; Fussmann, G

The results of runaway electron confinement experiments from ASDEX are analyzed to elucidate the structure of electromagnetic turbulence that causes anomalous electron heat transport in the L-mode confinement regime. From a simple model, the radial correlation length (W) of the magnetic turbulence is determined to be about 1 mm. Using this value and that of the experimentally deduced electron thermal diffusivity, we determine the radial magnetic fluctuation level at the plasma edge in the L-mode to be (B/sub r/B/sub 0/) )similarreverse arrowto) 2 x 10/sup -4/. Scalings of W and B/sub r/B/sub 0/ are deduced from parameter scans. From a comparison of these results with the predictions of various theoretical models, it is concluded that skin-depth turbulence, electromagnetic drift wave turbulence, rippling modes, and microtearing modes are inferior candidates and that resistive-ballooning modes offer the best possibility for a consistent interpretation of the data. 25 refs., 9 figs., 1 tab

• Research Organization: Texas Univ., Austin (USA). Inst. for Fusion Studies; Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)
• DOE Contract Number: FG05-80ET53088
• OSTI ID: 5234061
• Report Number(s): DOE/ET/53088-316; IFSR-316; ON: DE88007327
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ASDEX TOKAMAK
PLASMA CONFINEMENT
ELECTRONS
CHARGE TRANSPORT
CONFINEMENT TIME
DATA ANALYSIS
MAGNETIC FIELDS
MHD EQUILIBRIUM
NEUTRAL ATOM BEAM INJECTION
ORBITS
THERMAL DIFFUSIVITY
TURBULENCE
BEAM INJECTION
CLOSED PLASMA DEVICES
CONFINEMENT
ELEMENTARY PARTICLES
EQUILIBRIUM
FERMIONS
LEPTONS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production