We present theoretical and computational analyses of energy conversions in a magnetized collisionless plasma. We first revisit the theoretical approach to energy conversion analysis and discuss the expected correlations between the different conversion terms. We then present results from a Hybrid‐Vlasov simulation of a turbulent plasma, focusing on the immediate vicinity of a reconnection site. Energy transfers are examined locally and correlations between them are discussed in detail. We show a good anticorrelation between pressure‐driven and electromagnetic acceleration terms. A similar but weaker anticorrelation is found between the heat flux and thermodynamic work acting on internal energies. It is the departure from these anticorrelations that drives the effective changes in the species’ kinetic and internal energies. We also show that overall energy gain or loss is statistically related to the local scale of the system, with higher conversion rates occurring mostly at the smallest local plasma scales. To summarize, we can say that the energization and de‐energization of a plasma is the result of the complex interplay between multiple electromagnetic and thermodynamic effects, which are best taken into account via such a point‐by‐point analysis of the system.

中文翻译：

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与磁重联相关的能量转换

我们介绍了在磁化无碰撞等离子体中能量转换的理论和计算分析。我们首先回顾能量转换分析的理论方法，并讨论不同转换项之间的预期相关性。然后，我们介绍湍流等离子体的Hybrid-Vlasov模拟的结果，重点放在重新连接部位的紧邻区域。能量转移在本地进行了检查，并详细讨论了它们之间的相关性。我们在压力驱动项和电磁加速度项之间显示出良好的反相关性。在热通量和作用于内部能量的热力学功之间发现了类似但较弱的反相关关系。正是这些反相关的背离驱动了物种动能和内能的有效变化。我们还表明，总体能量的得失与统计上与系统的局部尺度有关，较高的转化率主要发生在最小的局部等离子体尺度上。总而言之，我们可以说，等离子体的通电和断电是多种电磁效应和热力学效应之间复杂相互作用的结果，最好通过对系统进行逐点分析来考虑。