Simulation study of discharge characteristics of two-dimensional large-area glow plasma tube

Plasma stealth technology is to use its own special physical properties and the effect of electromagnetic waves to achieve the purpose of stealth, plasma can reflect electromagnetic waves, absorption, scattering, etc. to achieve stealth, therefore, it is very important to study how to obtain a large-area plasma environment on the ground, in fact, glow discharge is one of the most commonly used methods that can indirectly achieve a large-area plasma discharge environment, relative to other discharge types, it can produce a wide range, Homogeneous plasma with stronger absorbing capacity and good stealth performance.This article conducted research on two different structures of glow discharge chambers, single tube and triple tube. Simulation studies were conducted using the multi physics field coupling software COMSOL based on fluid mechanics, and the changes in plasma electron density and other related parameters under different discharge powers and chamber pressures were analyzed, as well as the changes in the distribution area of plasma electron density. The research results indicate that while keeping the cavity pressure constant, the plasma electron density increases with the increase of discharge power; Keeping the discharge power constant, the plasma electron density increases with the increase of gas pressure, and the plasma area generated by the three tube glow discharge greatly increases. This study provides a basis for establishing relevant plasma stealth environments and experiments on the ground.