用低杂波的可近性条件、参量不稳定性条件和功率耦合谱分析了低杂波电流驱动（LHCD）。
The conditions of wave accessibility and parameter decay instability are used to analyse the density limit in LHCD.
从理论上得到光学不稳定性的条件；利用SPW观察到自脉冲、分叉及混沌等光学不稳性现象。
Theoretical calculation for prediction of optical unstability by SPW has been obtained and some experiments were carried out, optical unstability of self-pulsing, bifurcation and chaos were observed.
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