大气压流光放电等离子体因其具有气体阻力小、处理气量大等优势，在工业气态污染物治理领域具有潜在的应用价值。然而，如何在大气压条件下产生具有高等离子体密度、宽电极间隙的稳定流光放电仍是大气压放电等离子体应用领域面临的一个技术难题。项目提出利用磁场辅助纳秒脉冲放电技术，在宽电极间隙范围内激励产生具有高等离子体密度的大气压流光放电，并应用于挥发性有机废气（VOCs）的降解。采用实验结合仿真手段重点研究磁场对脉冲流光放电产生和发展过程的影响及内在本质；建立流光放电体系中活性粒子定量-半定量模型，研究磁场作用下脉冲流光放电等离子体中活性粒子的动力学行为，揭示磁场辅助增强纳秒脉冲流光放电等离子体物理和化学活性的作用机制；在此基础上进一步优化影响纳秒脉冲流光放电特性的关键因素，并形成产生高等离子体密度、宽间隙稳定流光放电的调控策略，为大气压放电等离子体污染控制技术提供可靠的理论依据和技术指导。

Atmospheric-pressure streamer discharge plasma has potential application in the field of gaseous pollutant control due to its advantages such as lower resistance and wider adaptability to gaseous pollutant. However, how to generate a stable streamer discharge with high plasma density and wide electrode gap is still a great technological problem in the field of atmospheric-pressure discharge application. On this project, an atmospheric-pressure streamer corona discharge with high plasma density is performed by using magnetic-field-assisted nanosecond pulse technology, and which is employed for the degradation of volatile organic compounds (VOCs). This project is willing to investigate the effect of magnetic field on the formation and development process of pulse streamer discharge and its underlining mechanism via combining experimental observation with simulation analysis. To reveal the promoting mechanism of the physical and chemical activities using magnetic-field-assisted nanosecond pulse streamer discharge, a quantitative-semiquantitative model of reactive species will be developed and the dynamics behaviors of reactive species will be investigated in streamer discharge system with the presence of magnetic field. On the basis of the above study, the project will further optimize the key factors influencing the discharge characteristics and form a control strategy to generate a stable streamer discharge with high plasma density and wide electrode gap. The achievement will provide reliable theoretical and technological references to atmospheric-pressure discharge plasma pollution control technology.