Abnormal magnetic field topology in the beam-plasma instability driven by ion dynamics

The current filamentation instability(CFI) is a ubiquitous instability caused by relativistic electron beams(REB) in astrophysical environments, which has been extensively studied due to its relevance to many research focus such as gamma-ray bursts. In our study, we are devoted to another type of filamentation instability, known as the plasma filamentation(PF), which exhibits abnormal topological structures in the particle and electromagnetic field distributions. Meanwhile, our results put forward that the transfer of the maximum amplitude of the magnetic field greatly reduces the photon radiation power. To verify that the faster response time of ions is the main cause of the plasma filamentation and weakened synchrotron radiation, we also have derived the conditions for its occurrence through theoretical analysis and conducted multiple validations.