Gyrokinetic understanding of the edge pedestal transport driven by resonant magnetic perturbations in a realistic divertor geometry

التفاصيل البيبلوغرافية
العنوان: Gyrokinetic understanding of the edge pedestal transport driven by resonant magnetic perturbations in a realistic divertor geometry
المؤلفون: Hager, Robert, Chang, C. S., Ferraro, N. M., Nazikian, R.
سنة النشر: 2020
المجموعة: Physics (Other)
مصطلحات موضوعية: Physics - Plasma Physics
الوصف: Self-consistent simulations of neoclassical and electrostatic turbulent transport in a DIII-D H-mode edge plasma under resonant magnetic perturbations (RMPs) have been performed using the global total-f gyrokinetic particle-in-cell code XGC, in order to study density-pump out and electron heat confinement. The RMP field is imported from the extended magneto-hydrodynamics (MHD) code M3D-C1, taking into account the linear two-fluid plasma response. With both neoclassical and turbulence physics considered together, the XGC simulation reproduces two key features of experimentally observed edge transport under RMPs: increased radial particle transport in the pedestal region that is sufficient to account for the experimental pump-out rate, and suppression of the electron heat flux in the steepest part of the edge pedestal. In the simulation, the density fluctuation amplitude of modes moving in the electron diamagnetic direction increases due to interaction with RMPs in the pedestal shoulder and outward, while the electron temperature fluctuation amplitude decreases.
نوع الوثيقة: Working Paper
DOI: 10.1063/1.5144445
URL الوصول: http://arxiv.org/abs/2003.07130
رقم الأكسشن: edsarx.2003.07130
قاعدة البيانات: arXiv