Effect of magnetic fluctuations on the confinement and dynamics of runaway electrons in the HT-7 tokamak
Effect of magnetic fluctuations on the confinement and dynamics of runaway electrons in the HT-7 tokamak
复制标题
磁涨落对 HT-7 托卡马克中失控电子的约束和动力学的影响
DOI：
10.1063/1.4795740
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发表时间：
2013-03
影响因子：
2.2
通讯作者：
S Y Lin
中科院分区：
文献类型：
--
作者：
M Xu;G Q Zhong;L Q Xu;S Y Lin
失控电子的性质是这样的，电子的约束和动力学可以受到等离子体磁波动的强烈影响。HT-7托卡马克的实验结果表明，由于磁波动导致失控电子的显著损失，但损失过程并不仅仅依赖于波动幅度。有效的径向失控输运要求在等离子体体积内不超过很小的区域有极低的失控输运。导出了损耗过程的径向失控扩散系数Dr≈10 m2s-1，并推导出了谐振磁面附近的扩散系数和屏蔽系数γ =0.8。利用试验粒子方程分析了磁波动对失控动力学的影响。结果表明，等离子体的最大能量对αs值（即输运减少后等离子体体积的百分比）非常敏感。在实验中，损失过程的αs=(0.28 ~ 0.33)。
The nature of runaway electrons is such that the confinement and dynamics of the electrons can be strongly affected by magnetic fluctuations in plasma. Experimental results in the HT-7 tokamak indicated significant losses of runaway electrons due to magnetic fluctuations, but the loss processes did not only rely on the fluctuation amplitude. Efficient radial runaway transport required that there were no more than small regions of the plasma volume in which there was very low transport of runaways. A radial runaway diffusion coefficient of Dr≈10 m2s-1 was derived for the loss processes, and diffusion coefficient near the resonant magnetic surfaces and shielding factor ϒ=0.8 were deduced. Test particle equations were used to analyze the effect of magnetic fluctuations on runaway dynamics. It was found that the maximum energy that runaways can gain is very sensitive to the value of αs (i.e., the fraction of plasma volume with reduced transport). αs=(0.28−0.33) was found for the loss processes in the experime...
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影响因子：
3.3
作者：
K. Finken;S. Abdullaev;M. Jakubowski;R. Jaspers;M. Lehnen;O. Zimmermann
通讯作者：
K. Finken;S. Abdullaev;M. Jakubowski;R. Jaspers;M. Lehnen;O. Zimmermann
影响因子：
2.2
作者：
P. Helander;L. Eriksson;F. Andersson
通讯作者：
P. Helander;L. Eriksson;F. Andersson
影响因子：
2.2
作者：
R. Yoshino;T. Kondoh;Y. Neyatani;K. Itami;Y. Kawano;N. Isei
通讯作者：
R. Yoshino;T. Kondoh;Y. Neyatani;K. Itami;Y. Kawano;N. Isei
影响因子：
3.1
作者：
M. Lehnen;S. Abdullaev;G. Arnoux;S. Bozhenkov;M. Jakubowski;R. Jaspers;V. Plyusnin;V. Riccardo-
通讯作者：
M. Lehnen;S. Abdullaev;G. Arnoux;S. Bozhenkov;M. Jakubowski;R. Jaspers;V. Plyusnin;V. Riccardo-
DOI：
10.1063/1.860431
发表时间：
1992
期刊：
Physics of fluids. B, Plasma physics
影响因子：
--
作者：
J. Myra;P. Catto
通讯作者：
J. Myra;P. Catto