Experimental analysis of two couples of pulses in the range of input power of 26–32 MW, shows that addition of pellet throughput to high gas dosing pulses does not modify the plasma energy, but leads to better conditions as far as the tungsten concentration and core radiation are concerned. Significantly decreasing the gas dosing with addition of high pellet throughput causes the increase of plasma energy, but the W concentration increases from 5.2 × 10⁻⁵ to 6.9 × 10⁻⁵ and the core radiation from 7.5 to 11 MW. From the numerical results of the self-consistent core-SOL COREDIV code two mechanisms appear to be responsible for the observed different W concentrations: the core residence time of W, which is related to the energy and particle confinement time, and the divertor impurity screening efficiency, dependent on the electron density and on the perpendicular transport coefficient in the SOL.

中文翻译：

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以气体和/或颗粒为燃料的高功率 JET-ILW 脉冲的 Core-SOL 模拟

对输入功率为 26-32 MW 范围内的两对脉冲的实验分析表明，在高气体剂量脉冲中增加颗粒通量不会改变等离子体能量，但会在钨浓度和核心方面产生更好的条件辐射有关。通过添加高颗粒通量显着降低气体剂量导致等离子体能量增加，但 W 浓度从 5.2 × 10 ^-5增加到 6.9 × 10 ^-5和从 7.5 到 11 兆瓦的核心辐射。从自洽核心-SOL COREDIV 代码的数值结果来看，两种机制似乎是造成观察到的不同 W 浓度的原因：W 的核心停留时间，与能量和粒子限制时间有关，以及偏滤器杂质筛选效率，取决于电子密度和 SOL 中的垂直传输系数。