The feasibility of a tokamak fusion reactor working in a reduced H-mode confinement, typical of the type III (or grassy) ELMs regime is here analyzed with two codes. The first is COREDIV that provides an integrated and self-consistent description of both the core and SOL plasma. The analysis is complemented by the 2D code TECXY which models the SOL more accurately and can then provide better estimates of the power deposited on the divertor targets. As for the present version of the EU-DEMO, the auxiliary power is fixed at 50 MW and q 95 = 3.5, while the energy confinement time is downgraded to 0.6 times the standard H-mode. The major radius R is increased by 1 m step from 9 up to 12 m and the toroidal magnetic field B T by 1 T step from 6 up to 8 T, with density kept at its Greenwald limit. An interesting working window around R = 11 m and B T = 7 is identified with the fusion gain Q ≈ 30. The impurity seeding by either Xe or Kr, which can reduce th...

中文翻译：

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缩合H型限制下聚变反应堆性能分析

托卡马克聚变反应堆在降低的H型限制下工作的可行性，在此通过两个代码分析了III型（或草皮）ELMs模式的典型情况。第一个是COREDIV，它提供了核心和SOL等离子体的完整且自洽的描述。2D代码TECXY对分析进行了补充，该代码可以更准确地对SOL建模，然后可以更好地估计沉积在偏滤器目标上的功率。对于当前版本的EU-DEMO，辅助功率固定为50 MW，q 95 = 3.5，而能量限制时间降低为标准H模式的0.6倍。主半径R从9到12 m逐渐增加1 m，环形磁场BT从6到8 T逐步增加1 T，密度保持在其格林瓦尔德极限。