A numerical study is presented, using the SOLPS-ITER plasma boundary code with full drifts and currents activated, of impurity seeded JET discharges in support of high power H-mode experimental campaigns designed to compare two ITER candidate seeding species, nitrogen (N) and neon (Ne). Fluid-kinetic edge plasma simulations are first performed at lower levels of power into the scrape-off layer (SOL) and benchmarked against existing JET experimental data. Calculations are then performed for higher levels of SOL power to examine the impact of this key parameter on the efficiency of both radiators. From the code point of view, for the chosen JET parameters, Ne can be as efficient a divertor radiator as N at the same level of upstream separatrix Z_eff < 1.5 for moderate seeding, decreasing the peak power at outer target by factor ~ 3. Full detachment (state with the temperature below 5 eV along all the target) at the outer target can be obtained with both impurities at higher seeding, but in the case of Ne this leads to a higher Z_eff and significant radiation in the main SOL/pedestal. The indications from this JET code modelling, in comparison with previous similar simulations for ITER and ASDEX Upgrade with drifts turned on, are that there is a beneficial impact of machine size in improving impurity retention, substantiating the claim that both N and Ne will perform well as seed impurities for divertor power dissipation in ITER.

使用 SOLPS-ITER 等离子体边界代码和完全漂移和电流激活的杂质种子 JET 放电进行数值研究，以支持高功率 H 模式实验活动，旨在比较两种 ITER 候选种子物种，氮 (N) 和氖（氖）。流体动力学边缘等离子体模拟首先在进入刮除层 (SOL) 的较低功率水平下进行，并根据现有的 JET 实验数据进行基准测试。然后针对更高水平的 SOL 功率执行计算，以检查该关键参数对两个散热器效率的影响。从代码的角度来看，对于所选择的 JET 参数，在上游分离线 Z _eff的同一水平上，Ne 可以作为与 N 一样有效的偏滤器辐射器 < 1.5 对于中等晶种，将外部目标处的峰值功率降低约 3 倍。在外部目标处，两种杂质都可以在较高晶种情况下获得完全脱离（沿着所有目标的温度低于 5 eV 的状态），但在在 Ne 的情况下，这会导致主 SOL/基座中的Z _eff和显着辐射。与之前打开漂移的 ITER 和 ASDEX 升级的类似模拟相比，此 JET 代码建模的迹象表明，机器尺寸对改善杂质保留有有益影响，证实了 N 和 Ne 将表现良好的说法作为 ITER 中偏滤器功率耗散的种子杂质。