Configuration of Self-consistent Flows in a Hole Structure

Self-consistent particle flows in a hole structure have been studied with a three dimensional electrostatic plasma particle simulation code. In our previous study, we investigated kinetic effects on plasma blob dynamics with the particle simulation code\footnote{H. Hasegawa and S. Ishiguro, Phys. Plasmas \textbf{22}, 102113 (2015).}$^{,}$\footnote{H. Hasegawa and S. Ishiguro, 57th APS-DPP meeting, TP12.147 (2015).}. In this study, we have improved the code in order to investigate the hole propagation dynamics. Here, the hole is the intermittent filamentary structure along the magnetic field line in peripheral plasmas of fusion magnetic confinement devices and the plasma density in the hole is lower than that of background plasma. In the simulation, a hole structure is initially set as a cylindrical form elongated between both end plates and propagates in the grad-B direction. The simulation confirms that a spiral current system is formed in a hole structure. Further, the investigation into the effect of impurities on the flow configuration will be reported.