تقرير
Magnetohydrodynamic normal mode analysis of plasma with equilibrium pressure anisotropy
| العنوان: | Magnetohydrodynamic normal mode analysis of plasma with equilibrium pressure anisotropy |
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| المؤلفون: | Fitzgerald, M., Hole, M. J., Qu, Z. S. |
| المصدر: | Plasma Physics and Controlled Fusion, Vol.57, No.2, February 2015, pp.025018 |
| سنة النشر: | 2014 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Plasma Physics |
| الوصف: | In this work, we generalise linear magnetohydrodynamic (MHD) stability theory to include equilibrium pressure anisotropy in the fluid part of the analysis. A novel 'single-adiabatic' (SA) fluid closure is presented which is complementary to the usual 'double-adiabatic' (CGL) model and has the advantage of naturally reproducing exactly the MHD spectrum in the isotropic limit. As with MHD and CGL, the SA model neglects the anisotropic perturbed pressure and thus loses non-local fast-particle stabilisation present in the kinetic approach. Another interesting aspect of this new approach is that the stabilising terms appear naturally as separate viscous corrections leaving the isotropic SA closure unchanged. After verifying the self-consistency of the SA model, we re-derive the projected linear MHD set of equations required for stability analysis of tokamaks in the MISHKA code. The cylindrical wave equation is derived analytically as done previously in the spectral theory of MHD and clear predictions are made for the modification to fast-magnetosonic and slow ion sound speeds due to equilibrium anisotropy. Comment: 19 pages. This is an author-created, un-copyedited version of an article submitted for publication in Plasma Physics and Controlled Fusion. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/0741-3335/57/2/025018 |
| URL الوصول: | http://arxiv.org/abs/1409.2980 |
| رقم الأكسشن: | edsarx.1409.2980 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/0741-3335/57/2/025018 |
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