论文标题
旋转圆柱形直升机排出等离子体的离子声学不稳定
The ion acoustic instability of the rotating cylindrical helicon discharge plasma
论文作者
论文摘要
由圆柱对称（方位模式数字M = 0）产生的圆柱等离子体的动力学理论是由圆柱几何形状和Helicon波和等离子体的径向不均匀性开发的。该理论揭示了由Helicon电场的径向不均匀性引起的，具有径向不均匀的角速度的电子方位角稳定旋转的宏观效应。发现这种剪切的旋转以及电子密度和温度不均匀性是导致不均匀圆柱等离子体的高频离子声学不稳定的发展。这种不稳定性在空间上定位在Helicon波电场的强梯度和等离子体密度的强度区域中，在该区域中，它比由电子波动相对于Helicon Wave中离子的振动运动驱动的参数不稳定性要强。
The kinetic theory for the cylindrical plasma, produced by the cylindrically symmetric (azimuthal mode number m=0) helicon wave, is developed with accounting for the cylindrical geometry and the radial inhomogeneity of the helicon wave and plasma. This theory reveals macroscale effect of the azimuthal steady rotation of electrons with a radially inhomogeneous angular velocity, caused by radial inhomogeneity of the helicon electric field. It is found that this sheared rotation as well as the electron density and temperature inhomogeneity are responsible for the development of the high frequency ion acoustic instability of the inhomogeneous cylindrical plasma. This instability is spatially localized in the region of strong gradients of the helicon wave electric field and of the plasma density, where it is more stronger than the parametric instabilities driven by the oscillating motion of the electrons relative to ions in the helicon wave.
