An Approach to Fit Ion Induced Secondary Electron Emission Coefficient on Ion Energy in Some Insulators

No theory exists explaining the kinetic emission of the ion induced secondary electron emission containing physical parameters of the emitter. Dionne derived an equation for the secondary electron emission yield based on no scattering and on a constant energy loss. Khairi et al. ., split Dionne's equation into the production and the emission terms. Recently, Rajopadhye et al. . considered both terms to remain the same as in secondary electron emission replacing the constant loss energy and the range of the primary electron by those corresponding for the primary ions. In the present approach, equations other than those used by Rajopadhye et al. . have been chosen to describe the low energy range of induced secondary yield. The mean free path λ s and the energy required to excite a secondary ξ are largely energy dependent. λ s is given empirically as a function of the primary energy.