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Impact of drifts in the ASDEX upgrade upper open divertor using SOLPS‐ITER
Contributions to Plasma Physics ( IF 1.6 ) Pub Date : 2020-04-05 , DOI: 10.1002/ctpp.201900166
I. Paradela Pérez 1, 2 , M. Groth 1 , M. Wischmeier 2 , D. Coster 2 , D. Brida 2 , P. David 2 , D. Silvagni 2 , M. Faitsch 2 , ,
Affiliation  

SOLPS‐ITER L‐mode‐like simulations with the full set of currents and drift velocities activated, and fluid neutrals have been carried out to interpret experimental results obtained in AUG. Drifts are critical to quantitatively reproduce the experimental results; however, simulations without drifts can also reproduce some trends qualitatively. The magnitude and dependence of the peak heat flux onto both targets on the upstream collisionality are, in general, in quantitative agreement within uncertainties with infrared thermography measurements in favourable field direction. The onset of power detachment is observed. In unfavourable toroidal field direction, a more symmetrical inner/outer target solution with regards to the power distribution is predicted, in agreement with experimental observations. However, also in unfavourable toroidal field direction, insufficient power is dissipated in the simulations and therefore qpeak, inn is overpredicted by up to a factor of 4 and qpeak, out by up to a factor of 1.5. The largest contribution to the sources due to radial transport in the energy balance equation is the radial divergence of the energy flux due to VE × B.

中文翻译:

使用SOLPS-ITER的ASDEX升级上开口偏滤器中的漂移影响

激活了全部电流和漂移速度并进行了流体中立的SOLPS-ITER L模式模拟已经进行了解释,以解释在AUG中获得的实验结果。漂移对于定量再现实验结果至关重要。但是,没有漂移的模拟也可以定性地再现一些趋势。通常,两个目标上的峰值热通量的大小和对上游碰撞性的依赖性,在红外热像仪测量的有利方向上的不确定性内,在定量上是一致的。观察到动力分离的开始。在不利的环形场方向上,与实验观察结果一致,预测了关于功率分布的更对称的内部/外部目标解。然而,q峰值,inn预测最多为4,q峰值,最大预测为1.5。在能量平衡方程中,由于径向传输而对能量源的最大贡献是由于V E  ×  B引起的能量通量的径向发散。
更新日期:2020-04-05
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