Magnetic pumping by magnetosonic waves in the presence of noncompressive electromagnetic fluctuations
Magnetic pumping by magnetosonic waves in the presence of noncompressive electromagnetic fluctuations
复制标题
在存在非压缩电磁波动的情况下通过磁声波进行磁泵浦
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
J. Borovsky
中科院分区：
文献类型：
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作者：
J. Borovsky
在静止无碰撞的等离子体中，带电粒子在磁声波中的运动是可逆的，但当存在俯仰角散射粒子的电磁等离子体波时，情况就不再是这样了，等离子体可能被磁声波磁泵浦，从波中提取能量。被激发的粒子与催化剂的电磁波共振，但从磁声波中获得能量。为了研究这一机制，使用了三种类型的数值模拟。在第一类中，通过跟踪磁声波驱动的粒子分布在俯仰角/动量空间的对流，并通过计算求解电磁涨落作用下分布函数演化的俯仰角扩散方程，详细地模拟了等离子体单元的磁泵浦。研究发现，磁声波能量主要传递给高能粒子。在..。
In a quiescent collisionless plasma the motion of charged particles within a magnetosonic wave is reversible, but in the presence of electromagnetic plasma waves that pitch‐angle scatter the particles, this is no longer true, and the plasma may be magnetically pumped by the magnetosonic wave, extracting energy from the wave. The particles that are energized are in resonance with the catalyst electromagnetic waves but gain their energy from the magnetosonic wave. To study this mechanism, three types of numerical simulations are used. In the first type, the magnetic pumping of an element of plasma is numerically simulated in detail by following the magnetosonic‐wave‐driven convection of the particle distribution through pitch‐angle/momentum space and by computationally solving a pitch‐angle diffusion equation for the distribution‐function evolution under the action of the electromagnetic fluctuations. It is found that the magnetosonic‐wave energy is transferred predominantly to high‐energy particles. In the...