论文标题
相对论等离子体中的磁性湍流光谱
Spectra of magnetic turbulence in a relativistic plasma
论文作者
论文摘要
我们介绍了具有强大背景磁场的磁性无碰撞相对论等离子体中强藻湍流的现象学和数值研究。与非相关的情况相反，这种湍流中的能量包含在磁性和电动波动中。我们认为，这种湍流类似于破裂的准中性性方案中强烈磁化的非相关等离子体中的湍流。我们对相对论对等离子体中湍流的2D粒子数值模拟发现，总能量的光谱具有缩放$ k^{ - 3/2} $，而磁性和电能之间的差异，所谓的残留能量，具有缩放$ k^{ - 2.4} $。 $ \ ell $的电动和磁波动表现出动态对齐，其对齐角缩放接近$ \ coscct_ \ ell \ propto \ ell^{1/4} $。在比（相对论）等离子体惯性尺度的尺度上，相对论惯性抗体的湍流的能量光谱陡峭至$ k^{ - 3.5} $。
We present a phenomenological and numerical study of strong Alfvénic turbulence in a magnetically dominated collisionless relativistic plasma with a strong background magnetic field. In contrast with the non-relativistic case, the energy in such turbulence is contained in magnetic and electric fluctuations. We argue that such turbulence is analogous to turbulence in a strongly magnetized non-relativistic plasma in the regime of broken quasi-neutrality. Our 2D particle-in-cell numerical simulations of turbulence in a relativistic pair plasma find that the spectrum of the total energy has the scaling $k^{-3/2}$, while the difference between the magnetic and electric energies, the so-called residual energy, has the scaling $k^{-2.4}$. The electric and magnetic fluctuations at scale $\ell$ exhibit dynamic alignment with the alignment-angle scaling close to $\cosϕ_\ell\propto \ell^{1/4}$. At scales smaller than the (relativistic) plasma inertial scale, the energy spectrum of relativistic inertial Alfvén turbulence steepens to $k^{-3.5}$.
