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Mass deposition after pellet injection into a tokamak

机译:颗粒注入托卡马克后的大量沉积

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The shift of the ionized plasma cloud, which is created in the process of pellet ablation, in the low field side (LFS) direction is calculated. It is demonstrated that the shift is determined, on the one hand, by the acceleration of a cloud in the LFS direction, and, on the other hand, by the reduction of the cloud polarization. The latter is caused by the generation of Alfven waves and compensation of the delB drifts in different parts of the cloud propagating along the magnetic field. Dissipative mechanisms of polarization reduction turned out to be less significant. An expression for the cloud displacement may be used to specify the initial density profile for simulation using one-dimensional transport codes. The calculated shift of the plasma cloud is consistent with the observations in ASDEX-Upgrade and DIII-D.
机译:计算在小球消融过程中产生的电离等离子体云在低场侧(LFS)方向上的位移。已经证明,该偏移一方面是通过LFS方向上的云的加速度确定的,另一方面是通过云偏振的减小来确定的。后者是由Alfven波的产生和沿磁场传播的云的不同部分中delB漂移的补偿引起的。极化减少的耗散机制被证明不那么重要。可以使用云位移的表达式来指定初始密度分布,以便使用一维传输代码进行仿真。计算出的等离子云偏移与ASDEX-Upgrade和DIII-D中的观察结果一致。

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