基于汤姆逊散射方法的等离子体射流暗通道电子密度、电子温度时空演变研究

The electron density and electron temperature of dark channel are important parameters of atmospheric pressure plasma jet (APPJ), which determines the propulsion process of the APPJ. However, due to the traditional optical emission spectrometry method, it is impossible to measure the electron density and electron temperature space-time evolution under the circumstance of weak light in dark channel. There is still not a clear recognition for the influence mechanism of dark channels and the intrinsic relationship between electron density, temperature and active particles. This project will select the typical pulse-driven DBD jet model as the object, and use Thomson scattering to directly measure the electron density of APPJ dark channel and electron temperature space-time evolution law. Under different discharge parameters, the project will study on electron density of dark channel in atmospheric pressure plasma jet, and also on the influence mechanism of electron temperature on jet propulsion speed, propulsion mode and propulsion mode, and finally reveals the mechanism of atmospheric pressure plasma jet propulsion. At the same time, combined with laser induced fluorescence method, the project will quantitatively study the formation mechanism of active particles of APPJ and the intrinsic relationship between electron density, electron temperature distribution and concentration distribution of active particles, providing experimental and theoretical guidance for the regulation and optimization of APPJ.

暗通道电子密度和温度是大气压等离子体射流（APPJ）的重要参数，它决定着射流的推进过程。但由于传统辐射光谱测量方法无法对暗通道弱光环境的电子密度、电子温度时空演变规律进行测量，这就导致人们对暗通道影响射流的推进机制、APPJ的电子密度、温度和活性粒子密度之间内在关系仍然不清楚。本项目将选择典型脉冲驱动DBD射流模型为对象，利用汤姆逊散射直接测量APPJ暗通道的电子密度、电子温度时空演化规律，在不同放电参数下，研究大气压等离子体射流暗通道电子密度、电子温度对射流推进速度、推进形态及推进模式影响机制，揭示大气压等离子体射流推进机理，同时结合激光诱导荧光法，定量研究大气压等离子体射流活性粒子形成机制及电子密度、电子温度分布与活性粒子的浓度分布内在关系，为大气压等离子体射流的活性调控与优化提供实验和理论指导。

暗通道电子密度和温度是大气压等离子体射流（APPJ）的重要参数，它决定着射流的推进过程。但由于传统辐射光谱测量方法无法对暗通道弱光环境的电子密度、电子温度时空演变规律进行测量，这就导致人们对暗通道影响射流的推进机制、APPJ的电子密度、温度和活性粒子密度之间内在关系仍然不清楚。本项目选择典型射流模型为对象，利用汤姆逊散射直接测量APPJ暗通道的电子密度、电子温度时空演化规律，在不同气体参数和放电参数下，研究大气压等离子体射流暗通道电子密度、电子温度对射流特征影响机制，同时结合激光诱导荧光法，定研究大气压等离子体射流活性粒子形成机制及电子密度分布与活性粒子的浓度分布内在关系，为大气压等离子体射流的活性调控与优化提供实验和理论指导。