OpenGGCM simulation of Diamagnetic Cavities in the wake of Flux Transfer Events

Diamagnetic Cavities (DMCs) characterized by reductions in magnetic field strength and the confinement of proton and electron populations, have been observed in Earth's space environments, including the magnetosheath and magnetosphere. This study focuses on the structure and dynamics of a new type of DMCs generated by Flux Transfer Events (FTEs) within the new region, the low to mid-latitude magnetosphere. Using data from the MMS mission, THEMIS, global MHD simulations, the OpenGGCM model, and particle tracing techniques, we investigate the characteristics, observational signatures, and associated particle energization processes of these "FTE-induced DMCs".  We found that FTE-induced DMC may serve as a new source of high-energy particles in the dayside magnetosphere.