General evolution of discharge state with nitrogen content in atmospheric pressure helium/nitrogen dielectric barrier discharge

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(3)

Published: March 1, 2025

Atmospheric pressure dielectric barrier discharge (DBD) holds extensive application prospects in fields such as material processing, biomedicine, and energy conversion. Discharge stability plays a crucial role achieving efficient, controllable, reproducible plasma treatment. While the inevitable presence of impurity N2 working gas significantly influences characteristics, current understanding content on remains insufficient. In this work, we systematically investigated impact temporal nonlinear behavior atmospheric He/N2 DBD using one-dimensional fluid model. Our findings reveal general characteristic evolution under different initial conditions: increases, initially develops into chaotic state then evolves symmetric single-period through inverse period-doubling bifurcation. This involves variations electron backflow regions resulting differences seed density between two consecutive applied voltage cycles. The present work provides an insight modulating dynamics DBD, offering theoretical guidance for stable applications.

Language: Английский

Broadband tunable terahertz near-perfect absorber enabled by rotationally symmetric single-layer graphene: A theoretical study

Physics Letters A, Journal Year: 2025, Volume and Issue: unknown, P. 130502 - 130502

Published: March 1, 2025

Language: Английский