A coupled EDDY/PIC/ELECTRAN simulation of erosion and deposition in gaps

作者：Inai K^*; Tomita Y; Kawamura G; Ohya K

来源：Fusion Engineering and Design, 2010, 85(7-9): 1416-1420.

DOI：10.1016/j.fusengdes.2010.03.068

• Particle-in-cell simulation
• Sheath
• Secondary electron
• Plasma-wall interaction
• Co-deposition
• Sputtering

To calculate complex plasma profiles in the gaps, the ELECTRAN code, which calculates secondary electron (SE) emission from metals, was combined with a two-dimensional kinetic code using the particle-in-cell (PIC) technique. We also performed a simulation of carbon/hydrocarbon deposition and re-erosion in the gaps on the condition that the plasma density and temperature were 10(18) m(-3) and 30 eV, respectively. A high flux of plasma ions occurred at the plasma-open side of the poloidal gap and at the E x B drift side of the toroidal gap. Although most of the carbon was redeposited at the side surface near the gap entrance, the redeposited carbon was re-eroded there due to plasma ion bombardment. As a result, erosion dominated at the plasma-open area near the gap entrance, whereas deposition dominated in deep regions.

• 出版日期2010-12