NIFS-839

FULL TEXT (PDF, 8835 KB)

Author(s):

S. Okamura et al.

Title:

Progress of Confinement Physics Study in Compact Helical System

Date of publication:

Oct. 2006

Key words:

21 IAEA Fusion Energy Conference , EX/5-5Rb

Abstract:

Large progress in the confinement improvement study in CHS was made for the internal transport barrier (ITB) and H-mode discharges with the edge transport barrier (ETB). For ITB, precise measurement of ion temperature gradient profile and the direct measurement of turbulent particle flux were made. For ETB study, edge fluctuations were measured with four different diagnostics and it was confirmed that the turbulence was suppressed by the ETB formation. The poloidal flow was measured and the creation of the strong electric field was confirmed for the H-mode discharges. H-mode with a high plasma density was developed with the reheat mode operation technique.

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