Ion-mixing mode and model for density rise in confined plasmas
Ion-mixing mode and model for density rise in confined plasmas
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DOI：
10.1103/physrevlett.41.551
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发表时间：
1978-08
影响因子：
8.6
通讯作者：
B. Coppi;C. Spight
中科院分区：
文献类型：
--
作者：
B. Coppi;C. Spight
在已知的碰撞输运过程不能提供充分解释的情况下，提出了中性气体进入等离子体腔时所观察到的密度上升速率的模型。在等离子体柱边缘产生致密的冷等离子体层，产生的离子温度梯度比相对密度梯度更陡，可以激发由离子漂移模式驱动的电子温度波动。在现实条件下，这些可以诱导新的电子和离子流入。
A model for the rate of density rise observed when neutral gas is fed into the plasma chamber is presented for regimes where known collisional transport processes do not provide an adequate explanation. A dense layer of cold plasma produced at the edge of the plasma column and the resulting ion-temperature gradient, sharper than the relative density gradient, can lead to the excitation of electron temperature fluctuations driven by ion drift modes. These can induce a new inflow of electrons and ions under realistic conditions.