Microwave Radiation Characteristics and Generation Mechanism of 2A12Al Simulated Satellite Structure Generated by High-Velocity Impact of Al/Ep Energetic Projectiles

Abstract

Due to the excellent structural strength and energy release characteristics of new Al/Ep energetic material, it can be used as an effective means of attack and defense confrontations in space. In addition, the analysis of the microwave radiation source generated by high-velocity Al/Ep energetic projectiles impacting on the simulated satellite structure and the interference effect of the microwave radiation generated by the impact source on the satellite information sending and receiving are of great significance for deeply revealing the physical mechanism of electromagnetic radiation generated by the high-velocity Al/Ep energy-containing projectiles impacting on the surface of the satellite with the 2A12 aluminum plate. In this article, a series of experiments are conducted by using a two-stage light gas gun loading system combined with a microwave radiation system. In the experiment, three ratios of Al/Ep energetic projectiles were used (the Al:Ep mass ratios were 30%:70%, 40%:60%, and 50%:50%, respectively). Al/Ep energetic projectile impacted on a simulated satellite structure made of a 2-mm-thick 2A12 aluminum plate at high speed. Meanwhile, the low-frequency microwave radiation signal generated by the impact is measured by the Yagi antenna and wide-frequency oscilloscope, and the time-frequency analysis is carried out by a fast Fourier transform (FFT). On this basis, the triple Langmuir probe and the transient fiber pyrometer are used to measure the plasma characteristic parameters and flash radiation parameters generated during the impact process. On this basis, the plasma characteristic parameters and flash radiation parameters generated during the impact process were measured by using the Langmuir triple probe and the transient fiber optic pyrometer. The results show that through theoretical calculations and experimental tests, three kinds of microwave radiation generation mechanisms, plasma waves, thermal radiation, and material destruction, are given, and the microwave radiation frequency domain, microwave radiation intensity peak, and aluminum particles in Al/Ep energetic material projectiles are obtained. The study is helpful in understanding the electromagnetic interference characteristics of the information transmission system on the satellite caused by the microwave radiation generated by the high-velocity impact on the 2A12 aluminum simulated satellite structure.