Femtosecond Pulsed Laser Simulation Of Single Event Effects Induced By Space Irradiation

In order to study the influence of space high-energy particles and radiation on components which are used in aerospace field in space radiation environment,the damage effect induced by single event effect induced by pulsed laser ground simulated space irradiation is preliminary explored.The multiphysics process in the process of effect induction,through the experimental and numerical simulation methods,the physical process of its action is initially quantified and analyzed,and the process of thermal evolution and the numerical calculation results of thermal effects based on multiphysics simulation are obtained.The laser supports the acceleration of the high-energy particles by the detonation wave,and the characteristic parameters of the wavefront dynamics are obtained.Based on the particle reaction kinetics,the damage effect of the incident high-energy particles on the equivalent target of the electronic component is calculated.In this paper,the FRAM with strong radiation resistance which is commonly used on the spacecraft is used as the target for inducing the single event effect.By referring to the instruction manual,the geometric model is established,and the region of the FRAM region is selected as the target.In the numerical simulation of thermal effect and thermal evolution,the region of high energy pulse is loaded,the material is defined,and the equivalent target physical model is established.The irradiation experiment is based on the femtosecond pulse laser system platform.In the experiment,the FRAM is in the normal working state,combined with the femtosecond pulse laser to simulate the spatial irradiation,and the temperature of the FRAM surface is recorded by the infrared camera and the field is obtained.The thermal field is obtained under different laser repetition frequency conditions.The typical error time is recorded.The nonlinear fitting relationship and thermal evolution law of characteristic temperature and re-frequency are obtained through data processing.In the subject of pulsed laser simulation of the induced single event effect of space irradiation,the ablation process of the FRAM surface encapsulation under laser irradiation is unavoidable.Therefore,using the established equivalent target physical model,the finite element analysis of the ablation and heat conduction process in the multi-physics simulation environment is carried out,and the heat transfer law of the typical time period is obtained,and the overall conduction law of heat in the FRAM is analyzed.According to the parameters of the femtosecond pulse laser platform,based on the one-dimensional constant C-J detonation theory,the physical model of laser-supported detonation wave is established.The mechanism of laser-supported detonation wave formation is obtained C-J conditions for stable propagation of detonation wave induced by high-energy particles are discussed.The propagation distance and propagation velocity of the laser-supported detonation wave are obtained,which can provide the theoretical basis for calculating the energy of incident high-energy particles.Based on the calculation of the propagation velocity characteristics and displacement characteristics of the laser-supported detonation wave as the high-energy particle acceleration mechanism,the energy of the high-energy particles is calculated by the particle acceleration principle,and the multi-layer equivalent target of the FRAM region is established as the high-energy particle beam.The target of bombardment,using nitrogen and oxygen atoms as incident high-energy particles,based on the simple collision theory of molecular reaction kinetics combined with reasonable assumptions,using SRIM to simulate the high-energy particle collision target,and obtain its multi-layer target.The displacement effect,distribution and preliminary calculation of target damage provide preliminary data support for the high-energy particle acceleration mechanism induced by space-induced spatial radiation induced single event effect.