Flute instability of plasma in a gas-dynamic trap
Flute instability of plasma in a gas-dynamic trap
复制标题
气体动力阱中等离子体的槽纹不稳定性
DOI：
10.1088/0029-5515/24/11/004
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发表时间：
1984
期刊：
影响因子：
3.3
通讯作者：
G. Stupakov
中科院分区：
文献类型：
--
作者：
V. P. Nagornyj;D. Ryutov;G. Stupakov
研究了气体动力学陷阱中等离子体的凹槽不稳定性，其中粒子λ的平均自由程比陷阱长度L的长度小。在分析不稳定性时，既考虑了维持系统稳定的能量和粒子注入对振荡的影响，也考虑了等离子体流过反射镜引起的扰动的衰减。给出了槽形失稳增长率的表达式，并用它建立了充要的稳定性判据。结果表明，在一定条件下，即使抑制了凹槽不稳定性，陷阱中仍然可以发展出特征增长率为等离子体寿命倒数量级的不稳定性。文中所考察的效果对λ>；L.
The flute instability of a plasma confined in a gas-dynamic trap where the mean free path of the particles λ is small compared with the trap length L is examined. In analysing the instability the influence on the oscillations both of the energy and particle injection which maintains the system in steady state and also of the damping of perturbations which results from plasma flowing out through the mirrors is included. An expression is obtained for the growth rate of the flute instability which is used in formulating the necessary and sufficient criterion of stability. It is found that in certain conditions, even when the flute instability has been suppressed, an instability with a characteristic growth rate of the order of the reciprocal of the plasma life-time can still develop in the trap. The effects examined in the paper are also of interest for open traps with λ > L.