Kinetic calculation of plasma deposition in castellated tile gaps
Plasma-facing divertors and limiters are armoured with castellated tiles to withstand intense heat fluxes. Recent experimental studies show that a non-negligible amount of deuterium is deposited in the gaps between tiles. We present here a numerical study of plasma deposition in this critical region. For this purpose we have developed a particle-in-cell code with realistic boundary conditions determined from kinetic calculations. We find a strong asymmetry of plasma deposition into the gaps. A significant fraction of the plasma influx is expelled from the gap to be deposited on the leading edge of the downstream tile.
Bibliographic Reference: An article published in: Journal of Nuclear Materials (2007), online edition
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Record Number: 200718976 / Last updated on: 2007-03-26
Original language: en
Available languages: en