Python scripts for input and post-processing of fuzz sputtering TRI3DYN simulations

The influence of a fuzzy surface on the physical sputtering of Mo in He
plasmas has been studied with hyperspectral imaging (HSI) measurements and
simulations that couple the TRI3DYN code with an impurity transport code.
The 2D profiles of the Mo I line emission intensity from HSI images reveal
that the sputtering yield, Y, is reduced to ~40% of the smooth-surface
value due to the presence of a fuzz layer, while the angular distribution
of the sputtered Mo atoms might not change significantly. The simulations
reproduce the Y reduction successfully, but indicate that fuzz causes an
increase in the small-angle distribution of sputtered atoms. However, the
increase is too small to produce an observable change in the Mo I emission
profiles. A simple analytical model that assumes a single collision mean
free path for a fuzz layer and considers only the primary sputtering
events qualitatively reproduces the Y reduction and the small-angle
distribution enhancement, explaining the geometrical effect of fuzz on
physical sputtering.