Generation Technique Of Monoenergetic X-ray Based On Bremsstrahlung

The navigation parameters of the spacecraft,including the position,velocity and time,can be determined highly accurately by detecting the X-ray radiation of pulsars.So the spacecraft can be able to operate autonomously by using the X-ray pulsar navigation.In order to study the key technologies of X-ray pulsar navigation,a simulation experiment system for X-ray pulsar need to be set up.As an important part of the simulation system,the simulating source of X-ray pulsar is the basis of the simulation system in normal work.Therefore,the study of X-ray pulsar simulation source has very important significance.This paper gives a systematic theorization on X-ray pulsar navigation.What's more,this article mainly introduces characteristics and working principle of several kinds of X-ray source.Integrating the generating scheme of X-ray at home and abroad.,this article comes up with using characteristic X-ray that is produced by the bremsstrahlung entering to metal target as a simulation source of X-ray pulsar.In order to get a soft X-ray source that has a good monoenergetic characteristic,this paper uses the MCNP and Geant4 code to simulate.Simulation process is mainly divided into the producing of bremsstrahlung and the producing of characteristics X-ray.Through the simulation of two processes,we get the energy spectrum of X-ray changing with the thickness and radius of a metal target,the energy of incident electron length,and characteristics of target material.We also get ratio of characteristic X-ray and X-ray changing with the thickness and radius of a metal target,the energy of incident electron length,and characteristics of target material,and a optimal solution of the monoenergetic characteristic.This paper will play a positive role in the development of X-ray pulsar ground simulation system.