Evolution of electrostatic structures in pair plasmas
Tuesday, 2 September 2014
Regency Ballroom (Hyatt Regency)
Chun-Sun Jao1 and Lin-Ni Hau1,2, (1)Institute of Space Science National Central University, Jhongli City, Taiwan, (2)National Central University, Department of Physics, Jhongli, Taiwan
Abstract:
Electrostatic waves and solitons have been widely observed in solar system plasma environments. While electron-positron plasmas may be present in the early universe and many astrophysical environments. Due to the inertia symmetry between electrons and positrons, the issue of whether solitons can actually form in pair plasmas has been raised and discussed in several papers. Recently we have shown that electrostatic solitons may be generated by streaming and bump-on-tail instabilities in pair plasmas based on particle-in-cell simulations. In this study the generation and evolution of electrostatic waves and solitons in pair plasmas is examined based on two-dimensional electrostatic particle-in-cell model. The effects of background magnetic field are examined and comparisons between one and two dimensional calculations are made.
