Research On The Interaction Between Electron Beam Plasma And Electromagnetic Wave

Plasma stealth technology is a kind of technology that uses plasma formed on the surface of weapons and equipment(such as aircraft,ships,etc.)to evade radar detection.It is an active stealth technology with many advantages,such as,flexible in use,good broadband effect,no affection on the structural appearance and start-up characteristics.This new technology shows great development potential,which is an effective technical way to further improve the stealth performance.There are many ways of generating plasma in plasma stealth technology.Because the electron beam plasma has the characteristic of separating the plasma from the generator compared with other plasma sources.The plasma generation method has a more reasonable spatial distribution,easy adjustment of the space size,and high energy utilization efficiency.The plasma source is less limited by the working pressure and gas type,lowering the power supply,and has higher engineering application value.This paper uses a combination of simulation calculation and experimental research,the electron beam plasma stealth system is systematically studied.In the aspect of simulation,the electron beam trajectory is simulated based on the finite difference method,and the influence of the characteristic parameters of the electron gun on the beam trajectory is studied;the electron beam plasma parameter distribution is calculated using the three-dimensional discharge cham-ber hybrid simulation model,and the simulation results are verified by related experiments and comparative research.Based on the finite integration method,the influence of plasma cloud size,plasma density,and collision frequency on the backward RCS of the target is analyzed using the finite integral method.The research work combined the electron beam transport process,plasma generation process,plasma and electromagnetic wave interaction process,simulated the actual working state of electron beam plasma attenuation of electromagnetic waves,and predicts the good attenuation effect of the system on electromagnetic waves.In terms of experiments,the electron beam trajectory is effectively controlled,the beam diameter in the electron beam transmission process is compressed,and the beam waist position is accurately judged through the combination of electric field and magnetic field constraints and corresponding simulation calculations,thereby reducing the film Film aperture size;at the same time,it greatly reduces the pressure of the system on the vacuum differential system,reduces the volume and quality of the vacuum differential system,and realizes the miniaturization of the system Conducted preliminary measurements of the plasma parameters.The experimental results are compared with the simulation calculation results.The plan combines the parameters of the various components of the stealth system to ensure the authenticity of the research results.