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Drift kinetic effects and local current drive induced modification of magnetic shear on sawtooth activity in EU DEMO
Nuclear Fusion ( IF 3.3 ) Pub Date : 2020-10-01 , DOI: 10.1088/1741-4326/abb122
Lina Zhou 1 , Yueqiang Liu 2 , Mattia Siccinio 3, 4 , Emiliano Fable 4 , Tingting Wu 5 , Ping Duan 1 , Long Chen 1
Affiliation  

The sawtooth activity is investigated for an EU DEMO reference plasma, including kinetic effects from both thermal particles and fusion-born alphas. Kinetic effects are studied in conjunction with modification of the magnetic shear near the q = 1 surface ( q is the safety factor) due to local current drive. Kinetic stabilization on the internal kink mode is found by both the non-perturbative MHD-kinetic hybrid code MARS-K (Liu et al 2008 Phys. Plasmas 15 112503) and the perturbative semi-analytic Porcelli model. The latter predicts full stabilization of the mode, when the local magnetic shear s 1 at the q = 1 surface is less than 1 (e.g. s 1 ∼ 0.6 as is the case for the target EU DEMO plasma without local current drive). By increasing the local magnetic shear with local current drive up to s 1 ∼ 2.8, one of the Porcelli sawtooth crash criteria can be satisfied, by accessing the ion-kinet...

中文翻译:

漂移动力学效应和局部电流驱动引起的电磁剪切对EU DEMO中锯齿活动的修正

研究了EU DEMO参考血浆的锯齿活性,包括热粒子和融合生成的α的动力学效应。通过局部电流驱动,结合在q = 1表面附近的磁切变(q是安全系数)来研究动力学效应。通过非扰动的MHD-动力学混合代码MARS-K(Liu等人,2008 Phys.Plasmas 15 112503)和扰动的半解析Porcelli模型,都发现了内部扭结模式的动力学稳定性。当在q = 1处的局部磁剪切s 1小于1时(例如,对于没有局部电流驱动的目标EU DEMO等离子体的情况,为s 1〜0.6),后者预测模式的完全稳定。通过在局部电流驱动下将局部磁剪增加至s 1〜2.8,
更新日期:2020-10-02
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