【2h】

Three-dimensional analysis of tokamaks and stellarators

机译:托卡马克和恒星的三维分析

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摘要

The NSTAB equilibrium and stability code and the TRAN Monte Carlo transport code furnish a simple but effective numerical simulation of essential features of present tokamak and stellarator experiments. When the mesh size is comparable to the island width, an accurate radial difference scheme in conservation form captures magnetic islands successfully despite a nested surface hypothesis imposed by the mathematics. Three-dimensional asymmetries in bifurcated numerical solutions of the axially symmetric tokamak problem are relevant to the observation of unstable neoclassical tearing modes and edge localized modes in experiments. Islands in compact stellarators with quasiaxial symmetry are easier to control, so these configurations will become good candidates for magnetic fusion if difficulties with safety and stability are encountered in the International Thermonuclear Experimental Reactor (ITER) project.
机译:NSTAB平衡与稳定性代码和TRAN蒙特卡洛输运代码为当前的托卡马克和恒星实验的基本特征提供了一个简单而有效的数值模拟。当网格大小与岛宽相当时,尽管数学上施加了嵌套的表面假设,但以守恒形式的精确径向差方案仍可以成功捕获磁岛。轴向对称托卡马克问题分叉数值解中的三维不对称性与实验中不稳定的新古典撕裂模式和边缘局部模式的观察有关。具有准轴对称性的紧凑型恒星中的岛更易于控制,因此,如果在国际热核实验反应堆(ITER)项目中遇到安全性和稳定性方面的困难,这些配置将成为磁聚变的良好候选者。

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