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首页> 外文期刊>Plasma physics and controlled fusion >Particle transport of electron cyclotron resonant heating plasma in Large Helical Device
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Particle transport of electron cyclotron resonant heating plasma in Large Helical Device

机译：大螺旋装置中电子回旋谐振加热等离子体的颗粒传输

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The particle diffusion coefficient and convection velocity of electron cyclotron resonant heating plasmas have been evaluated using a density modulation experiment in the Large Helical Device. The diffusion coefficients and convection velocities were estimated by a newly developed analysis method. This method combines conventional quasi-Newton optimization and a genetic algorithm (GA). The GA finds the appropriate initial values. By giving the appropriate initial values for the quasi-Newton method, falling into an inappropriate solution which is not applicable for transport physics such as negative diffusion coefficients or extremely high values can be avoided. The diffusion coefficient obtained with the modulation experiment (D-mod) in the core region increases monotonically with the increase of the effective collisionality (nu h*1.5D(mod) were from several times to three orders higher than those obtained by neoclassical prediction. On the other hand, V-mod was comparable with the neoclassical estimation. Ion-scale microturbulence was measured and compared with D-mod and V-mod. The comparison suggested possible linkage between the two.
机译：使用大螺旋装置中的密度调制实验，已经评估了电子回旋谐振加热等离子体的粒子扩散系数和对流速度。通过新开发的分析方法估计扩散系数和对流速度。该方法结合了传统的准牛顿优化和遗传算法（GA）。 GA找到适当的初始值。通过为准牛顿方法提供适当的初始值，落入不适用于运输物理学的不适当的解决方案，例如可以避免负漫射系数或极高的值。随着核心区域中的调制实验（D-Mod）获得的扩散系数随着有效碰撞性的增加而单调地增加（NU H * 1.5d（mod）下重建它来自几次三个订单高于由新古典主义预测获得的订单。另一方面，V-MOD与新古典估计相当。测量离子尺度的微矛盾并与D-MOD和V-MOD进行比较。比较建议两者之间的可能联系。

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