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Active feedback stabilization of multimode flute instability in a mirror trap

机译:镜阱中多模凹槽不稳定的主动反馈稳定

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摘要

The flute instability in a table-top mirror machine has been stabilized by a feedback system consisting of optical sensors, a digital signal processor and charge-injecting electrodes. The use of multiple sensors and actuators enable the feedback to simultaneously stabilize two modes of the fast-growing, slowly rotating flute instability. Step function response and magnetohydrodynamic spectroscopy indicate a smooth frequency response and an inherent delayed response of the plasma drift due to the sheath resistivity. The measured feedback power is very small relative to the heating power of the plasma.
机译:通过光学传感器,数字信号处理器和电荷注入电极组成的反馈系统,可以稳定台式镜机中的凹槽不稳定性。使用多个传感器和执行器可以使反馈同时稳定快速增长,缓慢旋转的笛子不稳定性的两种模式。阶跃函数响应和磁流体动力学谱表明,由于鞘层电阻率的影响,等离子体漂移具有平滑的频率响应和固有的延迟响应。相对于等离子体的加热功率,所测量的反馈功率非常小。

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