Thaury C, Mora P, Héron A, Adam J C
Centre de Physique Théorique, Ecole Polytechnique, CNRS, Palaiseau, France.
Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Jul;82(1 Pt 2):016408. doi: 10.1103/PhysRevE.82.016408. Epub 2010 Jul 27.
The expansion of a plasma slab into a vacuum is studied using one-dimensional and two-dimensional particle-in-cell simulations. As electrons transfer their longitudinal kinetic energy to ions during the expansion, the electron temperature becomes anisotropic. Once this anisotropy exceeds a threshold value, it drives the Weibel instability, leading to magnetic fields in the megagauss range. These fields induce energy transfer between the longitudinal and transverses directions, which influences the expansion. The impact of a cold electron population on this phenomenon is also investigated.
使用一维和二维粒子模拟研究了等离子体平板向真空中的膨胀。在膨胀过程中，由于电子将其纵向动能转移给离子，电子温度变得各向异性。一旦这种各向异性超过阈值，就会引发韦贝尔不稳定性，导致产生兆高斯范围内的磁场。这些磁场会引起纵向和横向之间的能量转移，从而影响膨胀。还研究了冷电子群体对这一现象的影响。
