Electron temperature, density and pressure gradients at the edge in H-mode JFT-2M plasma

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...

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Bibliographic Details
Published in:Physics letters. A 1998-10, Vol.247 (4), p.330-338
Main Authors: Yamauchi, Toshihiko, Ishige, Youichi, Kozawa, Teruo, Schiina, Tomilo
Format: Article
Language:English
Subjects:
Electron density
Electron scale length
Electron temperature
ELMy
H-mode
TVTS
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Summary: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.
ISSN:0375-9601
1873-2429
DOI:10.1016/S0375-9601(98)00635-5