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Measurement and Modeling of Hydrogen Molecule Ro-Vibrational Accommodation on E-204 Polycrystalline Graphite...

Publication Type
Journal
Journal Name
Plasma Physics and Controlled Fusion
Publication Date
Page Number
102001
Volume
50
Issue
10

The loss rate of H2 and D2 internal ro-vibrational energy in collisions
with an E-294 polycrystalline graphite surface is measured in a plasma-free
environment. Accommodation coefficients are found to be approximately
0.01�0.2 for vibrational energy and somewhat larger, 0.05�0.2 for rotational
energy, with a slight increasing trend seen with increasing surface temperature.
Molecular dynamics simulations of the experiment give a total ro-vibrational
accommodation rate of order 0.1, which is consistent with the data at higher
surface temperatures.