Hybrid-Vlasov–Maxwell simulations of magnetized plasma turbulence including non-linear electron-inertia effects in a generalized Ohm's law are presented. When fluctuation energy is injected on scales sufficiently close to ion-kinetic scales, the ions efficiently become de-magnetized and electron-scale current sheets largely dominate the distribution of the emerging current structures, in contrast to the usual picture, where a full hierarchy of structure sizes is generally observed. These current sheets are shown to be the sites of electron-only reconnection (e-rec), in which the usual electron exhausts are unaccompanied by ion outflows and which are in qualitative agreement with those recently observed by MMS in the Earth's turbulent magnetosheath, downstream of the bow shock. Some features of the e-rec phenomenology are shown to be consistent with an electron magnetohydrodynamic description. Simulations suggest that this regime of collisionless reconnection may be found in turbulent systems where plasma processes, such as micro-instabilities and/or shocks, overpower the more customary turbulent cascade by directly injecting energy close to the ion-kinetic scales.

提出了磁化等离子体湍流的混合-Vlasov-Maxwell模拟，包括广义欧姆定律中的非线性电子惯性效应。与通常的情况相反，当波动能量以足够接近离子动力学尺度的尺度注入时，离子会有效地被消磁，并且电子尺度的电流片将主要控制新兴电流结构的分布。通常观察到结构尺寸。这些电流表显示为仅电子重新连接（e-rec）的位置，在该位置中，通常的电子排气不伴随离子流出，并且与最近通过电子观测发现的定性一致。彩信在地球的湍流磁石场中，在船首冲击的下游。e-rec现象学的某些特征显示与电子磁流体动力学描述一致。仿真表明，这种无碰撞重新连接机制可以在湍流系统中找到，在该系统中，等离子体过程（例如微不稳定性和/或冲击）通过直接注入接近离子动力学尺度的能量来克服更常见的湍流级联。