目前在大气压下，尤其是在开放空气中，稳定的大体积弥散辉光放电的获取仍然存在很大难度。申请人的以往研究表明，谐振恒流源可驱动稳定的厘米量级尖-板间隙丝状大气压空气辉光放电，外施磁场可以有效扩展放电等离子体的空间分布，从而获得大体积弥散大气压下辉光放电。然而，这种大气压空气辉光放电工业应用的实现还需深入研究外施磁场对获取大体积弥散大气压辉光放电的影响规律以及调控机制。本项目拟通过纳秒曝光时间下的等离子体形态变化、发射光谱诊断参量的时-空分布、放电电压、放电电流等测量值的联合分析，研究不同放电间隙中等离子体的分布、放电模式的变化特征以及宏观微观参量的内在联系，揭示谐振恒流源驱动长距离大气压辉光放电的机理，掌握在施加外施磁场后不同因素对大体积弥散大气压空气辉光放电获取的影响规律，并最终阐明外施磁场的调控机制，为谐振恒流源驱动的大气压辉光放电的工业应用推广奠定基础。

Nowadays, the acquisition of stable large-volume and uniform glow discharge at atmospheric pressure, especially in open air, is still difficult. My previous research shows that a stable centimeter-scale filamentary atmospheric air glow discharge in pin-plate gap can be driven by resonant constant-current power supply, and the external magnetic field can effectively expand the spatial distribution of discharge plasma, which results a large-volume and diffuse atmospheric pressure glow discharge. However, in order to realize the industrial application of such atmospheric pressure glow discharge, it is necessary to further study the influence law and regulation mechanism of the external magnetic field on the acquisition of such a large-volume diffuse atmospheric pressure glow discharge. In this project, through the comparative analysis of the plasma shape change under nanosecond exposure time, space-time distribution of spectral diagnostic parameters, discharge voltage, discharge current and other measured values, the change characteristics of the plasma distribution in different discharge gaps, discharge mode and the internal relationship of macro and micro parameters are studied to reveal the mechanism of resonant constant-current power supply driving atmospheric pressure glow discharge. On this basis, the influence of different factors on the acquirement of atmospheric pressure air glow discharge with large volume dispersion is studied after applying external magnetic field, and the regulation mechanism of external magnetic field is clarified finally, which provides technical support for industrial application of atmospheric pressure glow discharge driven by resonant constant-current power supply.