Energy transfer and conversion in turbulent magnetic reconnection

Authors: Sohom Roy (University of Delaware), Riddhi Bandyopadhyay (Princeton University), William H. Matthaeus (University of Delaware), Yan Yang (University of Delaware)

One of the central problems in turbulent plasmas is to understand the nature of the cross-scale energy transfer process and the dissipation occurring at kinetic scales. Magnetic reconnection has been shown to play an important role in driving the sub-ion scale energy transfer in these systems. A scale filtering approach can be adopted to study this scale-dependent energy transfer and conversion. Previously, simulations of turbulence and laminar reconnection have shown how the different terms in the scale-filtered equations dominate at different scales. The energy fluxes are found to dominate in the intermediate range of scales, while the dissipation terms dominate at very small scales. However, this picture can become complicated in the case of magnetic reconnection occuring in a turbulent plasma. In this study, the scale filtering method is adopted to explore how energy is interconverted between different forms and across scales in turbulent magnetic reconnection using a combination of MMS observations and PIC simulations.