MCNP Simulate The Deep Charging Process Of Satellites Media

In recent years, as satellites media deep charging frequently intrucedgeosynchronous orbit satellites operating faults, we use a kind of method-MCNP tosimulate the satellite deep charging process, the theoretical value derived by theMCNP provide data to support and technical reference for the satellites could operatesafely in space. MCNP is a kind of calculation method combined probability theoryand computer technology, according to the actual need to establishs a theoreticalmodel simulation,and looks the results of computer simulation as a approximateproblem to be solved.This thesis simplifies the satellites deep charging process of high-energy electronin slab model as the electron pass through shielding material into the media Epoxy.First, it calculates the thickness of media Epoxy to produce the maximum electronicfield is0.3cm in the absence of shielding material by the0.75MeV monoenergeticelectron incident. Secondly, the optimum thickness of shielding material Al iscalculated as0.1cm according to the calculated thickness of media Epoxy.Thirdly,giving four kinds of materials（Al、Ag、Fe、Organic Glass）to be shielding, contrastthe effect of incident electron energy to the maximum electronic field generated inmedia Epoxy, in the same conditions, it is said that the best shielding effect is the Agsubstance, but when considered comprehensivly(such as price), the best shieldingeffect is the Al substance. In the end, giving different thickness of Al substance,contrast the effect of incident electron energy to the maximum electronic fieldgenerated in media Epoxy, it gets a conclusion that with the increase of shieldingmaterial thickness, the maximum electronic field generated in media Epoxy isgradually reduced, and when media Epoxy generates the maximum electronic fieldcorresponding to the incident electron energy is increasing.