H2 Formation on the Dust Grain Surface in Divertor Plasma
Keywords:
dust, plasma, divertor, tokamakAbstract
Edge plasma of divertor in tokamak is characterized by different values of plasma parameters (plasma
density and temperature), plasma composition and overcoming plasma dynamics processes. We survey a
model for theoretical study of the interaction of hydrogen with dust surface and apply our results the H2
formation on dust grain surfaces in the divertor. In this model, considering both physisorbed and
chemisorbed sites on the grain surface and then adatoms mobility to go from one site to other site by
thermal diffusion, describes the formation of H2 on grain surfaces. We find H2 formation rate on the high
temperature dust surfaces in divertor for a range of dust and gas temperatures and densities.
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Copyright (c) 2014 M. Bakhtiyari-Ramezani, J. Mahmoodi, N. Alinejad
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