
Author(s):
T. Ono, Y. Aoki, T. Kawamura, T. Kenmotsu, Y. Yamamura

Title:
An Extended Formula for the Energy Spectrum of Sputtered Atoms form a Material Irradiated by Light Ions
Date of publication:
Oct. 2004

Key words:
Sputtering, erosion, PlasmaMaterials interaction, First Wall Materials

Abstract:
We extend a formula proposed by Kenmotsu et al. (hereafter Paper I), which fits with the energy spectrum of atoms sputtered from a heavy material hit by lowenergy light ions (H^+, D^+, T^+, He^+) by taking into account an inelastic energy loss neglected in Paper I. We assume that primary knockon atoms produced by ions backscattered at large angles do not lose energy while penetrating the material up to the surface, instead of the energyloss model used in Paper I. The extended formula is expressed in terms of a normalized energydistribution function and is compared with the data calculated with the ACAT code for 50 eV, 100 eV and 1 keV D^+ ions impinging on a Fe target. Our formula fits well with the data in a wide range of incident energy.

