Monte Carlo simulation of electron-beam induced charge-up phenomena of Teflon thermal blanket

We propose a new method describing a charge-up phenomenon induced by electron beam in Teflon film from a microscopic viewpoint. The physical model of the 1 eV-30 keV electron scattering in the insulating polymer is used to calculate the charge distribution inside Teflon film. The electric field and the potential distribution as a function of the irradiation time are calculated from Poisson's equation. The relaxation of the charge density under its own electric field is not considered in the present method. The calculated surface potential is in good agreement with our experimental data.