Transport of runaway electrons in sawtooth active plasmas in the HT-7 tokamak

Transport of runaway electrons in sawtooth active plasmas in the HT-7 tokamak
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HT-7 托卡马克锯齿状活性等离子体中失控电子的传输

DOI:
10.3938/jkps.61.1037
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发表时间:
2012-10
影响因子:
0.6
通讯作者:
Zhang, Yang
Zhang, Yang
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Chen, Zhong Yong;Jin, Wei;Zhang, Yang

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磁涨落水平是低混合电流驱动 (LHCD) 等离子体中的一个重要参数,因为 LHCD 已广泛用于提高 HT-7 托卡马克中的等离子体性能。我们研究了 HT-7 托卡马克中带有强锯齿的 LHCD 等离子体中失控电子的传输。发现软X射线锯齿的峰值和硬X射线通量的峰值之间存在延迟时间。根据延迟时间,我们得到了逃逸电子的输运系数和等离子体锯齿活动的平均磁波动水平。我们发现,失控电子的扩散系数约为 Dr ∼ 1 m2s−1,磁涨落水平约为 b̃ ∼ 10−6。
The magnetic fluctuation level is an important parameter in lower hybrid current-drive (LHCD) plasmas because LHCD has been used to improve plasma performance extensively in the HT-7 tokamak. We investigate the transport of runaway electrons in LHCD plasmas with strong sawteeth in the HT-7 tokamak. A delay time was found to exist between the peak of the soft X-ray sawteeth and the peak of the hard X-ray flux. Based on the delay time, we obtained the transport coefficient of the runaway electrons and the averaged magnetic fluctuation level in sawtooth activity of the plasmas. We found that the diffusion coefficient of the runaway electrons was on the order of Dr ∼ 1 m2s−1 and that the magnetic fluctuation level was on the order of b̃ ∼ 10−6.
DOI: 10.1063/1.863433
发表时间: 1981-04
期刊: Physics of Fluids
影响因子: 4.6
作者:
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