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Author(s):
K. Ida, S.-I. Itoh, K. Itoh, S. Hidekuma, Y. Miura, H. Kawashima, M. Mori, T. Matsuda, N. Suzuki, H. Tamai, T.Yamauchi and JFT-2M Group
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Title:
Density Peaking in the JFT-2M Tokamak Plasma with Counter Neutral Beam Injection
Date of publication:
May 1991
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Key words:
Peaked density profile, plasma rotation, radial electric field, improved confinement, inward pinch, counter Neutral Beam Injection, JFT-2M tokamak
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Abstract:
A significant particle pinch and reduction of the effective thermal diffusivity are observed after switching the neutral beam direction from co- to counter-injection in the JFT-2M tokamak . A time delay in the occurance of density peaking to that of plasma rotation is found. This shows that the particle pinch is related to the profile of the electric field as determined by the plasma rotation profile . The measured particle flux shows qualitative agreement with the theoretically-predicted inward pinch.
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