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Author(s):
W. Wang, M. Okamoto, N. Nakajima and S. Murakami
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Title:
Collisional Transport in a Plasma with Steep Gradients
Date of publication:
June 1999
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Key words:
delta f method, drift kinetic equation, neoclassical theory, linear collision operator, collisional transport, finite orbit width, steep gradients
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Abstract:
The validity is given to the newly proposed two weight delta f method for neoclassical transport calculation, which can solve the drift kinetic equation considering effects of steep plasma gradients, large radial electric field, finite banana width, and an orbit topology near the axis. The new method is applied to the study of ion transport with steep plasma gradients. It is found that the ion thermal diffusivity decreases as the scale length of density gradient decreases, while the ion particle flux due to ion-ion self collisions increases with increasing gradient.
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