Dataset from: Isolation and Phase-Space Energization Analysis of the Instabilities in Collisionless Shocks

We analyze the generation of kinetic instabilities and their effect on the energiza-<br> tion of ions in non-relativistic, oblique collisionless shocks using a 3D-3V simulation<br> by dHybridR, a hybrid particle-in-cell code. At sufficiently high Mach number, quasi-<br> perpendicular and oblique shocks can experience rippling of the shock surface caused by<br> kinetic instabilities arising from free energy in the ion velocity distribution due to the<br> combination of the incoming ion beam and the population of ions reflected at the shock<br> front. To understand the role of the ripple on particle energization, we devise the new<br> instability isolation method to identify the unstable modes underlying the ripple and<br> interpret the results in terms of the governing kinetic instability. We generate velocity-<br> space signatures using the field-particle correlation technique to look at energy transfer in<br> phase space from the isolated instability driving the shock ripple, providing a viewpoint<br> on the different dynamics of distinct populations of ions in phase space. We generate<br> velocity-space signatures of the energy transfer in phase space of the isolated instability<br> driving the shock ripple using the field-particle correlation technique. Together, the<br> field-particle correlation technique and our new instability isolation method provide a<br> unique viewpoint on the different dynamics of distinct populations of ions in phase space<br> and allow us to completely characterize the energetics of the collisionless shock under<br> investigation.我们采用混合粒子网格（particle-in-cell, PIC）代码dHybridR所开展的三维三速度空间（3D-3V）模拟，分析了非相对论性倾斜无碰撞激波中的动理学不稳定性（kinetic instability）的产生过程，及其对离子能量加速的影响。当马赫数（Mach number）足够高时，准垂直激波与倾斜激波的激波表面会出现波纹化现象，该现象由动理学不稳定性引发，而该不稳定性的起源为入射离子束与在激波锋面（shock front）反射的离子群体共同构成的离子速度分布自由能。 为厘清激波波纹对粒子加速的作用机制，我们提出了全新的不稳定性分离方法（instability isolation method），以识别驱动激波波纹的不稳定模，并基于支配性动理学不稳定性对结果进行解读。 我们借助场粒子关联（field-particle correlation）技术生成速度空间特征信号，以探究驱动激波波纹的孤立不稳定性在相空间（phase space）中的能量转移过程，从而从相空间视角解析不同离子群体的差异化动力学行为。 我们还通过场粒子关联技术，生成了驱动激波波纹的孤立不稳定性的相空间能量转移速度空间特征信号。 综上，场粒子关联技术与我们提出的新型不稳定性分离方法，为解析相空间中不同离子群体的差异化动力学过程提供了独特视角，同时使我们能够完整表征所研究无碰撞激波的能量特性。