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首页> 外文期刊>Japanese journal of applied physics.Part 1.Regular papers & short notes >An EDDY/Particle-in-Cell Simulation of Erosion of Plasma Facing Walls Bombarded by a Collisional Plasma
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An EDDY/Particle-in-Cell Simulation of Erosion of Plasma Facing Walls Bombarded by a Collisional Plasma

机译：碰撞等离子轰击的等离子面壁冲蚀的EDDY /细胞内颗粒模拟

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摘要

To investigate the erosion of a plasma-facing wall intersecting an oblique magnetic field, we performed a kinetic particle-in-cell (PIC) simulation of magnetized plasma, in which collision processes between charged and neutral particles were taken into account. Sheath formation and local physical quantities, such as the incident angle and energy distributions of plasma ions at the wall, were examined at a plasma density of 10~18 m~-3, a temperature of 10 eV, and a magnetic field strength of 5T. The erosion rate of a carbon wall was calculated using the ion-solid interaction code EDDY. At a high neutral density (>10~-20m~-3), the impact energy of the ions dropped below the threshold for physical sputtering, so that the sputtering yield was drastically decreased and wall erosion was strongly suppressed. Sputter erosion was also suppressed when the angle of the magnetic field with respect to the surface normal was sufficiently large.
机译：为了研究与倾斜磁场相交的面向等离子体的壁的腐蚀，我们对磁化等离子体进行了动力学粒子模拟（PIC），其中考虑了带电粒子与中性粒子之间的碰撞过程。在10〜18 m〜-3的等离子体密度，10 eV的温度和5T的磁场强度下检查了壁的形成和局部物理量，例如壁离子的入射角和能量分布。 。使用离子-固体相互作用代码EDDY计算碳壁的腐蚀速率。在高中性密度（> 10〜-20m〜-3）下，离子的冲击能降至物理溅射的阈值以下，从而大大降低了溅射产量，并强烈抑制了壁腐蚀。当磁场相对于表面法线的角度足够大时，溅射腐蚀也得到抑制。

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