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在 FEB- E设计阶段 ,偏滤器从开放式固定板靶优化为封闭式气体靶 ,以改善偏滤器的杂质控制和增加离子与气体的相互作用。通过喷气和注入杂质获得的部分脱靶等离子体形成了动态气体靶。喷气能降低删削层 (SOL)处等离子体温度 ,注入的杂质增加了 SOL处的辐射功率 ,使靶板的负载降低。用 NEWT1D编码模拟了 SOL处等离子体和杂质 (硼杂质 )的输运 ,得到了杂质、等离子体温度和等离子体密度分布。着眼于杂质的滞留和辐射 ,优化了喷气点的位置。用偏滤器靶板上热负载的减少量评估了硼杂质注入的效果。
In the FEB-E design phase, the divertor is optimized from an open, fixed plate target to a closed gas target to improve divertor impurity control and increase ion-gas interactions. Part of the off-target plasma obtained by jetting and injecting impurities forms a dynamic gas target. Jet can reduce the plasma temperature at the exclusion layer (SOL), and the implanted impurities increase the radiant power at SOL, reducing the load on the target. The NEWT1D code was used to simulate the transport of plasma and impurities (boron impurities) at SOL and the impurity, plasma temperature and plasma density distributions were obtained. Focusing on the retention and radiation of impurities, the jet position is optimized. The effect of boron impurity implantation was evaluated using the reduction in thermal load on the divertor target.