PPPL-4076 is available in <a href="PPPL-4076.pdf">pdf</a> format (320 KB).

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<b>Towards a Revised Monte Carlo Neutral Particle Surface Interaction Model</b>
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<b>Author:</b> D.P. Stotler
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<b>Date of PPPL Report:</b> June 2005
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Physica Scripta T124 (2006) pp. 23&ndash;26.
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Presented at the Workshop for New Directions for Advanced Computer Simulations and Experiments in Fusion-related Plasma-surface Interations for Fusion (21-23 March 2005, Oak Ridge, TN).</p>


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The components of the neutral- and plasma-surface interaction model used in the Monte Carlo neutral transport code DEGAS 2 are reviewed. The idealized surfaces and processes handled by that model are inadequate for accurately simulating neutral transport behavior in present day and future fusion devices. We identify some of the physical processes missing from the model, such as mixed materials and implanted hydrogen, and make some suggestions for improving the model.



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