结果表明，当射频场的频率小于或等于离子等离子体频率时，离子流密度明显地随时间变化。
It has been shown that when the RF frequency is less than the ion plasma frequency, the ion flux density will strongly depend on the time.
当外加射频频率远大于离子等离子体频率，离子响应平均场，离子的密度分布几乎不随时间变化；
When the external RF frequency is much bigger than ion plasma frequency, ions answer average field.
着重研究了等离子体临界电子密度、电子等离子体频率等参数对电磁波的折射、吸收、反射的影响。
In this paper, the effects of critical electron density of plasma and the plasma frequency of electron on the refraction, absorption and reflection of the electromagnetic wave are studied.
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