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中国物理学会期刊

高频波激发低频磁场和离子声波的重整化强湍动理论

CSTR: 32037.14.aps.35.283

THE RENORMALIZED STRONG TURBULENCE THEORY FOR THE LOW-FREQUENCY MAGNETIC FIELD AND THE ION ACOUSTIC WAVE EXCITED BY HIGH-FREQUENCY WAVE

CSTR: 32037.14.aps.35.283
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  • 本文给出了高温等离子体中高频波激发低频磁场和离子声波强湍动过程的重整化理论,以便改善通常的弱非线性处理方法,从Vlasov-Maxwell方程组出发,在Fourier表象中得到了包含“最发散”和“次发散”效应互相耦合的高频和低频传播于重整化方程组,从而获得了高、低频振荡粒子重整化分布函数和场的耦合关系。在“最发散”重整化近似下,我们求解了高低频传播子方程组,得到了展开到v4(高频湍动场能密度与等离子体热能密度之比)一次方的近似解和重整化介电函数等表达式。然后,在Fourier逆变换下导得了我们所要的时空表用中重整化强湍动方程组。最后,作为一个说明重整化作用的例子,在一维稳态下求解了孤立子的形式。

     

    In this paper, the renormalized turbulence theory for the lowfrequency magnetic field and the ion acoustic wave in the high temperature plasma is developed in order to improve the usual weak nonlinear-approach. From Vlasov-Maxwell equations, the coupled renormalized equations of the high and low frequency propagator, with the "most divergence" and "secondary divergence" effects included, are derived in the Fourier representation. Thus, we obtain the coupled relation of the renormalized par-tical distribution function and field for high and low-frequency oscillation.Under "most divergence" renormalization approximation, the propagator equations for high and low-frequency are solved. Expanding to the order of v4—the ratio of the energy density of the high-frequency turbulence field to the thermal energy density of the plasma particle, the approximate solutions for the propagator and the expressions for the renormalized dielectric function are obtained. Then, by performing Fourier inverse transformation, the renormalized strong turbulence equations are derived in the spacetime representation.Finally, as an example which shows the renormalized effects, under onedimensional and stationary approximation, the analytical form for the soliton is solved.

     

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