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