论文标题
在半倾斜磁化 - 血泡中的压力各向异性效应的观察结果
Observations of Pressure Anisotropy Effects within Semi-Collisional Magnetized-Plasma Bubbles
论文作者
论文摘要
磁化等离子体相互作用在天体物理和实验室等离子体中无处不在。已经证明，各种物理效应在受相反磁场影响的碰撞血浆流中很重要，但是，对相互作用区域内机制的实验验证仍然难以捉摸。在这里，我们讨论了一个激光 - 血浆实验，实验结果验证了Biermann电池产生的磁场是否由Nernst流动和各向异性压力效应促进，并在重新连接区域中占主导地位。这些字段使用时间分辨的质子探测在多个方向上进行映射。各种实验，建模和分析技术证明了各向异性压力在半倾斜的高$β$等离子体中的重要性，与电阻性过程相比，重新连接场的大小降低。各向异性压力动力学在无碰撞等离子体中至关重要，但在碰撞等离子体中通常被忽略。我们显示的压力各向异性对于维持相互作用层至关重要，即使是半趋势，高能量密度物理（HEDP）机制的重新分布磁场
Magnetized plasma interactions are ubiquitous in astrophysical and laboratory plasmas. Various physical effects have been shown to be important within colliding plasma flows influenced by opposing magnetic fields, however, experimental verification of the mechanisms within the interaction region has remained elusive. Here we discuss a laser-plasma experiment whereby experimental results verify that Biermann battery generated magnetic fields are advected by Nernst flows and anisotropic pressure effects dominate these flows in a reconnection region. These fields are mapped using time-resolved proton probing in multiple directions. Various experimental, modelling and analytical techniques demonstrate the importance of anisotropic pressure in semi-collisional, high-$β$ plasmas, causing a reduction in the magnitude of the reconnecting fields when compared to resistive processes. Anisotropic pressure dynamics are crucial in collisionless plasmas, but are often neglected in collisional plasmas. We show pressure anisotropy to be essential in maintaining the interaction layer, redistributing magnetic fields even for semi-collisional, high energy density physics (HEDP) regimes
