论文标题
磁场通过不均匀回流电流产生
Magnetic field generation by an inhomogeneous return current
论文作者
论文摘要
提出了带有梁成分的无碰撞血浆中磁场的新一代机理。我们表明，即使最初满足电流和电荷中立率，如果存在不均匀性，当前中性最终会违反，以便产生磁场。通过进行二维粒子中的二维粒子模拟，我们证明了磁场是按预期产生的。磁场的新一代机理在当前宇宙中可以发挥重要作用，因为宇宙射线可以视为天体物理等离子体中的光束成分。我们提出，第一个宇宙射线在Z〜20的红移时产生了大规模的磁场。
A new generation mechanism of the magnetic field in an inhomogeneous collisionless plasma with a beam component is proposed. We show that even though the current and charge neutralities are initially satisfied, the current neutrality is eventually violated if there is an inhomogeneity, so that the magnetic field is generated. By conducting ab initio two-dimensional particle-in-cell simulations, we demonstrate that the magnetic field is generated as expected. The new generation mechanism of the magnetic field can play an important role in the current universe because cosmic rays can be regarded as the beam component in the astrophysical plasma. We propose that the first cosmic rays generate the magnetic field with a large scale at the redshift of z ~ 20.
