In:
The Physics of Fluids, AIP Publishing, Vol. 29, No. 1 ( 1986-01-01), p. 309-317
Abstract:
Electron temperature fluctuations have been investigated in the edge region of the Caltech research tokamak [S. J. Zweben and R. W. Gould, Nucl. Fusion 25, 171 (1985)], and an upper limit to this fluctuation level was found at T̃e/Te ≲15%. This measurement, together with previous measurements of density and electric and magnetic field fluctuations, allows a unique comparison of the heat transport resulting from three basic turbulent mechanisms: (1) heat flux from the particle flux resulting from microscopic density and electric field fluctuations; (2) thermal conduction resulting from microscopic temperature and electric field fluctuations; and (3) thermal conduction resulting from microscopic magnetic field fluctuations. The measurements indicate that, in the edge regions, the electron heat transport caused by the measured turbulence-induced particle flux is comparable to or greater than that caused by the thermal conduction associated with the electron temperature and electric field fluctuations, and is significantly greater than that resulting from the measured magnetic fluctuations. This electron hea t loss caused by the plasma turbulence is found to be an important electron energy loss mechanism in the edge regions.
Type of Medium:
Online Resource
ISSN:
0031-9171
Language:
English
Publisher:
AIP Publishing
Publication Date:
1986
detail.hit.zdb_id:
1472743-2
detail.hit.zdb_id:
241528-8
Permalink