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EP: Fachverband Extraterrestrische Physik
EP 4: Poster Session
EP 4.27: Poster
Tuesday, February 26, 2013, 11:15–12:45, Poster OG
Particle simulation of an Alfvénic turbulence cascade in the solar chromosphere — •LiHui Chai1,2, Jörg Büchner2, and KuangWu Lee2 — 1University of Science and Technology of China, Hefei, China — 2Max-Planck-Institut für Sonnensystemforschung, Katlenburg-Lindau, Germany
Inertial Alfvén waves has been proposed to accelerate electrons in the chromosphere where they might cause hard X ray radiation during solar flare [Fletcher & Hudson 2008, ApJ, 675, 1645]. Due to their short transverse wave length inertial Alfvén waves carry a longitudinal electric field parallel to the background magnetic field. This longitudinal field can accelerate particles and dissipate wave energy to the plasma particles that move at the wave speed, i.e. via Landau damping effect [Landau 1946, J. Phys. USSR, 10, 25].
For this study an electromagnetic two-dimensional particle-in-cell simulation (2D EM PIC) is used to study the proposed acceleration mechanism in chromospheric plasmas. To generate an incoming Alfvén wave, an antenna that generates sinusoidal oscillating perpendicular electric fields is placed at one boundary. While the waves propagates into chromospheric plasmas a parallel electric field is obtained. The response of the particle distribution to this parallel electric field as well as the acceleration due to Landau damping are discussed in this work.