Authors: M. Wüst and P. Bochsler
Reference: Nucl. Instrum. Methods in Phys. Res. B 71 (1992) 314-323
Abstract:
A computer code was developed to simulate ion backscattering from rough
surfaces. We present results of numerical simulations of 1 MeV protons
backscattered from copper surfaces as a function of various surface
topologies and of random surface roughness. If applied to planar
surfaces, the results of our code are in good agreement with results
from previously published numerical simulation codes and with results
from the small-angle scattering approximation. For the application of
our interest, i.e., energy analyzers for space research, we find that
serrated surfaces or rough surfaces with random profiles can
significantly reduce ion backscattering in comparison to flat surfaces.
Finally, we compare results from a numerical simulation with data from
a backscattering experiment on a spherical energy analuzer and find
good agreement.