Abstract
The full electron temperature ( T e ) and density ( n e ) profiles in the H-mode plasmas are measured precisely with a TV Thomson scattering system. The temperature gradient at the edge in the H-mode is 5–6 times higher than that of the L-mode phase. The electron temperature scale length ( L Te ) is equal to the density scale length ( L ne ) at the beginning of the H-mode phase, and L Te −1 is larger than L ne −1 in the H-mode phase, which is contrary to that of the ohmic heating. L Te and L ne of the ELMy H-mode are longer than that of the ELM-free H-mode.
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