[PEM21-P06] Particle Simulations on Near-Spacecraft Plasma Perturbations in Polar Ionospheric Environment
Keywords:Polar Ionospheric plasma, sounding rocket, spacecraft charging, wake, PIC simulation
Our preliminary results confirmed 1. rocket surface potential depending on an angle between the geomagnetic field and the rocket axis and 2. asymmetric wake structure due to strong magnetization of plasma electrons. We analyzed their associated electron dynamics around the rocket and found that electron motion creates a circular current center at the body, which may be attributed to the ExB drift as well as the diamagnetic effect. We have also started a numerical study on frequency spectra of potential fluctuations and their relevance to plasma wave modes near a spacecraft/rocket.