Toroidal modeling of energetic passing particle drift kinetic effects on tearing mode stability
| العنوان: | Toroidal modeling of energetic passing particle drift kinetic effects on tearing mode stability |
|---|---|
| المؤلفون: | Guangzhou Hao, Neng Zhang, Xue Bai, Yueqiang Liu |
| المصدر: | Nuclear Fusion. 62:076043 |
| بيانات النشر: | IOP Publishing, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Nuclear and High Energy Physics, Physics::Plasma Physics, Condensed Matter Physics |
| الوصف: | Drift kinetic effects of the neutral beam injection induced passing energetic particles (EPs) on the linear stability of the n = 1 tearing mode (TM) (with the dominant poloidal harmonic of m = 2) are numerically investigated utilizing the MARS-K code (Liu et al 2008 Phys. Plasmas 15 112503), in a tokamak plasma with finite equilibrium pressure and anisotropic thermal transport. In the low plasma pressure regime, it is found that co- (counter-) passing EPs stabilize (destabilize) the TM, agreeing with previous studies. However, as the plasma pressure increases beyond a critical value, it is found that co-passing EPs also destabilize the mode. An in-depth analysis reveals that the net effect of co-passing EPs is a result of competition between the stabilizing contribution from the non-adiabatic drift kinetic terms and the destabilizing contribution associated with adiabatic terms, with the latter becoming more dominant at higher equilibrium pressure. Non-perturbative magnetohydrodynamic-kinetic hybrid modeling also finds that co- and counter-passing EPs modify the TM eigenfunction differently, with the counter-passing EPs enhancing the sideband harmonics. Furthermore, effects of the plasma resistivity and toroidal rotation, as well as that of the equilibrium distribution of EPs in the particle pitch angle space, are also investigated, showing asymmetric results on the TM stability between the co- and counter-passing EPs. The first order finite orbit width correction is found to be stabilizing with co-passing EPs and destabilizing with counter-passing particles. Finally, drift resonances between passing EPs and the TM induce finite frequency to the mode and generate finite net torques inside the plasma, due to the neoclassical toroidal viscosity and the Reynolds stress associated with 3D perturbations. |
| تدمد: | 1741-4326 0029-5515 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::abc63b4f9ee5458dda160485514971bb https://doi.org/10.1088/1741-4326/ac6bb3 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........abc63b4f9ee5458dda160485514971bb |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17414326 00295515 |
|---|