COMPARISON OF ELECTRICAL CONDUCTIVITIES DERIVED FROM MEASURED CURRENT DENSITY DISTRIBUTIONS AND ELECTRON TEMPERATURE PROFILES IN THE TEXTOR TOKAMAK
Radial profiles of the electrical conductivity in TEXTOR (R-o =1.75 m, r-L = 0.46 m, n-e = 2.4 . 10**19 m**-3, T-eo = 900 eV) were determined independently (1) from experimental T-e profiles and Z-eff distributions using Spitzer's formula and neoclassical theory, and (2) from measured current density profiles and the loop voltage. A detailed comparison of the results clearly favours neoclassical theory over pure Spitzer conductivity, although the combined errors of the measurements + discussed in chapter 5 + prevent an unambiguous decision. T-e profiles were obtained by observing the soft x-ray continuum radiation simultaneously along five chords and by Thomson scattering at seven points of the vertical plasma diameter. In addition, T-eo was measured continuously by electron cyclotron emission diagnostics. Z-eff values at three radial positions were determined from soft x-ray line and continuum intensities. Current density distributions and n-e profiles were derived from phase shift and Faraday rotation measurements using a nine channel far infrared interferometer - polarimeter.
Bibliographic Reference: 1984 INTERNATIONAL CONFERENCE ON PLASMA PHYSICS, LAUSANNE (SWITZERLAND), JUNE 27-JULY 3, 1984 VOL. I, PP. 499-513 EUR 9708 EN (1985), FS, VOL. I AND VOL. II, 1155 P., BFR 3500 (BOTH VOLUMES), EUROFFICE, LUXEMBOURG, POB 1003
Record Number: 1989124055600 / Last updated on: 1987-01-01
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