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首页> 外文期刊>Physics Letters, A >EFFECT OF RELATIVISTIC NONLINEARITY ON A DRIVEN ELECTRON PLASMA WAVE IN A WEAKLY INHOMOGENEOUS PLASMA
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EFFECT OF RELATIVISTIC NONLINEARITY ON A DRIVEN ELECTRON PLASMA WAVE IN A WEAKLY INHOMOGENEOUS PLASMA

机译：相对论非线性对弱非均匀等离子体中驱动电子等离子体波的影响

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摘要

The effect of a relativistic nonlinearity on the excitation of an electron plasma wave (epw) in a cold weakly inhomogeneous plasma is analyzed. It is shown that the relativistic electron mass increase in a large epw field results in a frequency detuning of the epw in the vicinity of the critical layer of linear resonance, and the tunneling of the driven epw to the overdense plasma side. Due to this, the saturated amplitude of the driven wave is limited by 2.2beta(d)1/3, which is independent of the density scale-length. The field amplitude distributions of the driven wave are calculated for both the cases of linear and parabolic density profiles. The resonance absorption decrease due to the relativistic nonlinearity is also discussed. [References: 10]
机译：分析了相对论非线性对冷弱非均匀等离子体中电子等离子体波（epw）激发的影响。结果表明，在较大的epw场中相对论电子质量的增加会导致线性谐振的关键层附近的epw频率失谐，并导致被驱动的epw隧穿到过密的等离子体侧。因此，驱动波的饱和振幅受到2.2beta（d）1/3的限制，而这与密度标度长度无关。对于线性和抛物线密度分布，都可以计算出驱动波的场振幅分布。还讨论了由于相对论非线性导致的共振吸收降低。 [参考：10]

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