Electron Heat Diffusivity in the HT-7 Tokamak with Si-Coating Wall
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Abstract
Electron heat diffusivity inferred from the electron power balance was studied in the ohmically heated plasma on an HT-7 tokamak. The results obtained before and after siliconization were compared and it is found that the diffusivity is reduced obviously in the half of the outer region (r/a > 0.5) after siliconization, which was the reason why energy confinement was improved after siliconization.
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