NIFS-083

FULL TEXT (PDF, 618 KB)


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

Title:

Density Peaking in the JFT-2M Tokamak Plasma with Counter Neutral Beam Injection

Date of publication:

May 1991

Key words:

Peaked density profile, plasma rotation, radial electric field, improved confinement, inward pinch, counter Neutral Beam Injection, JFT-2M tokamak

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.

List of NIFS Report (1991)Return toContents Page Return toNIFS Homepage
footer
 National Institute for Fusion Science
Copyright: 1995-2007 National Institute for Fusion Science (NIFS)
Address: 322-6,Oroshi-cho, Toki, GIFU, 509-5292, Japan
Telephone:+81-572-58-2222