Research on the mechanism of initial explosion electromagnetic radiation under different vacuum degrees

Explosion electromagnetic radiation (EEMR), as an accompanying phenomenon during the explosion processes, has attracted widespread academic attention. However, a specific theoretical model characterizing its generation mechanisms remains unestablished. Addressing this gap, this study developed a theoretical model for atmospheric environments through integrated theoretical and experimental approaches, innovatively constructing research encompassing three core elements: (1) A customized EEMR testing platform with controllable vacuum conditions; (2) An advanced signal processing algorithm integrating signal denoising with electric field strength reconstruction; (3) A theoretical model linking EEMR with detonation transmission. The results indicate: The initial EEMR originates from the process in which the detonation wave transmits into the air. calculated electric field strength decreased from 0.72 V/m to 0.45 V/m as vacuum degrees increased from 0 to 90% (maximum prediction deviation: 4.3%). The established model quantitatively correlates EEMR with key shockwave parameters (temperature, pressure, density, thickness, velocity etc.), revealing significant correlations between measurement results and calculation results (R² > 0.99). This work presents the first physics-based explanation model for EEMR analysis, providing crucial theoretical support for explosion diagnostics and energetic material characterization.