Achieving a long-lived high-beta plasma state by energetic beam injection
Achieving a long-lived high-beta plasma state by energetic beam injection
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DOI：
10.1038/ncomms7897
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发表时间：
2015-04-01
影响因子：
16.6
通讯作者：
Trask, E.
中科院分区：
文献类型：
--
作者：
Guo, H. Y.;Binderbauer, M. W.;Trask, E.
发展高β(等离子体与磁压比)的稳定等离子体状态对于经济的磁聚变反应堆是至关重要的。处于这一努力前沿的是与实地相反的配置。在这里，我们通过高能束流注入演示了快离子对磁流体扰动不稳定性的动力学稳定效应，这种不稳定性被称为倾斜模式，它对进一步的场反转组态的发展构成了中心障碍。这项技术与主动等离子体边界控制的协同效应相结合，使完全稳定的超高β(接近100%)等离子体具有长寿命。
Developing a stable plasma state with high-beta (ratio of plasma to magnetic pressures) is of critical importance for an economic magnetic fusion reactor. At the forefront of this endeavour is the field-reversed configuration. Here we demonstrate the kinetic stabilizing effect of fast ions on a disruptive magneto-hydrodynamic instability, known as a tilt mode, which poses a central obstacle to further field-reversed configuration development, by energetic beam injection. This technique, combined with the synergistic effect of active plasma boundary control, enables a fully stable ultra-high-beta (approaching 100%) plasma with a long lifetime.