1. Model validation on EAST and DIII-D experiments highlight the roles of the Low-Z background impurities and the sheath potential in determining high-Z materials erosion
WI emission for W divertor in EAST
W ersoion rate for metal ring in DIII-D
High-Z material erosion and migration strongly depends on the transport and deposition of low-Z impurities
Good agreement between measured W gross erosion rate and the ERO modeling taking into account re- erosion processes
Local sheath potential perturbation leads to more than an order of magnitude reduction of erosion rate due to lower ion incident energy and flux
( cm-2s-1sr-1)
(1015 cm-2s-1) WI
ERO
Ion streamlines and the potential distribution
Floating
Biased