Research on the spatio-temporal characteristics of high energy pulsed plasma jets

Abstract

This research proposes a high-energy pulsed plasma jet for producing highly dynamic and huge gradient plasma. The injected plasma enters the plasma sheath, and the stealth of the high-speed vehicle is achieved by modulating the dynamics of the plasma sheath electron density. The characteristics of the plasma were extensively diagnosed using current–voltage measurements, high-speed cameras, and optical emission spectroscopy. This includes the electrical parameters of the plasma and its spatial and temporal distribution. The deposited energy rises and then falls as the pressure rises. The high-speed camera determines that the plasma injection process lasted 160.04 μs. The electron temperature ranges from 0.68 to 1 eV. The electron density ranges from 2.5 × 1016 to 2.1 × 1017 cm−3 with an increasing trend from 0 to 12 μs and a decreasing trend from 12 to 28 μs. As the axial position rises, the electron density gradually decays. The analysis of high-energy pulsed plasma jets provides the framework for future research into active stealth in high-speed vehicles.