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Edge Particle Flux with Temperature Fluctuation in the HL-2A Tokamak |
| CHENG Jun;YAN Long-Wen;HONG Wen-Yu;QIAN Jun;ZHAO Kai-Jun |
| Southwestern Institute of Physics, Chengdu 610041 |
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| Cite this article: |
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CHENG Jun, YAN Long-Wen, HONG Wen-Yu et al 2007 Chin. Phys. Lett. 24 3191-3194 |
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Abstract Electron temperature, density, plasma potential and their fluctuation profiles at edge plasmas are measured simultaneously with a reciprocating probe system in HL-2A. The analysis results of four-tip data indicate that the temperature fluctuation has relative amplitude of 10--15%, gives more contribution to particle flux in lower (0--25kHz) and higher frequency (50--250kHz) ranges. The coherence between temperature fluctuations and density or potential fluctuations implies that their coupling will impact anomalous transport. The measured diffusion coefficient is about three times of the Bohm diffusion coefficient when considering the temperature fluctuation. The particle flux with temperature fluctuation is discussed in HL-2A for the first time.
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| Keywords:
52.25.Gj
52.55.Fa
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Received: 29 January 2007
Published: 23 October 2007
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| PACS: |
52.25.Gj
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(Fluctuation and chaos phenomena)
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52.55.Fa
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(Tokamaks, spherical tokamaks)
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