Anisotropy and flow in fast-particle dominated and burning tokamak plasmas: stability of ITER and the coming demonstration fusion power plant

该项目将确定束流注入和聚变生成的α粒子如何影响球形托卡马克中的磁波和激发波模式，这些粒子对这些模式的影响最大。了解这些效应对于利用燃烧等离子体进行高性能托卡马克的长脉冲运行至关重要。例如，在英国的球形托卡马克桅杆上，快离子驱动的爆发性“啁啾模式”和“短骨”模式演变成了破坏等离子体性能的“长寿命”模式。该项目将解决种子快离子驱动模式、其线性阈值和完全非线性演化的物理问题。更广泛的成果包括在下一步燃烧等离子体实验中确定束流和阿尔法的影响范围，例如用于材料开发的核设施、ITER和聚变发电厂。

This project will identify how beam injected and fusion born alphas affect the magnetic ?eld and excite wave modes in spherical tokamaks, where these particles have the most impact. Understanding these effects is critical to long pulse operation of high performance tokamaks with burning plasmas. In the UK spherical tokamak MAST for instance, fast ion driven bursty “chirping modes” and “?shbone” modes evolve into "long-lived" modes damaging plasma performance. This project will resolve the physics of the seed fast ion driven mode, its linear threshold and fully nonlinear evolution. Wider outcomes include scoping the impact of beams and alphas in next step burning plasma experiments, such as a nuclear facility for materials development, ITER, and a fusion power plant.