Density fluctuation in HT-6M tokamak by CO2 laser scattering

Lei Zeng; Jinxiang Cao; Guoliang Zhu; Weixing Ding; Chang-Xuan Yu; Daqing Zhang; Youyi Li

doi:10.1117/12.155787

10 September 1993 Density fluctuation in HT-6M tokamak by CO₂ laser scattering

Lei Zeng, Jinxiang Cao, Guoliang Zhu, Weixing Ding, Chang-Xuan Yu, Daqing Zhang, Youyi Li

Proceedings Volume 1928, International Symposium on Laser-Plasma Interactions; (1993) https://doi.org/10.1117/12.155787
Event: Laser-Plasma Interactions: the International Symposium, 1992, Shanghai, China

Abstract

The small scale density fluctuations in the interior of HT-6M Ohmic plasma have been studied by CO₂ laser collective scattering system in deuterium discharges covering a wide range of nq_a (chord-average density times safety factor at the limiter) and energy confinement time. The relative density fluctuation level in the interior is inversely proportional to the toroidal magnetic field and average density, and the energy confinement time (tau) _E decreases with the fluctuation level increasing in the region where (tau) _E linearly increases with nq^0.5_a and satisfies the Goldston scaling law. It is suggested that the microturbulence in the interior zone is responsible for anomalous transport in tokamaks.

Citation Download Citation

Lei Zeng, Jinxiang Cao, Guoliang Zhu, Weixing Ding, Chang-Xuan Yu, Daqing Zhang, and Youyi Li "Density fluctuation in HT-6M tokamak by CO₂ laser scattering", Proc. SPIE 1928, International Symposium on Laser-Plasma Interactions, (10 September 1993); https://doi.org/10.1117/12.155787

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