Transient Electron Kinetic in Diffuse Discharges

快速脉冲漫射放电广泛应用于脉冲功率应用，如气体激光器和开关。这两个领域的目标都是减少这些放电的上升和下降时间，并开发工具来预测它们的时间依赖行为。大多数漫射放电是弱电离的，它们的行为主要是电子和中性的碰撞。目前的研究项目关注的是气体混合物中特定成分对放电特性的影响，以及对放电的时间依赖行为的影响，以便针对特定应用进行优化。本文研究了在电场强度E/N和/或电子源s快速变化的影响下气体放电的瞬态行为。将上升和下降时间降低到纳秒和亚纳秒区域需要考虑非稳态电子动力学及其对放电时间依赖性行为的影响。这项工作包括旨在描述非平衡电子动力学的理论研究和将允许证明理论结果的实验研究。理论研究是基于一种正在发展的新的数值方法——蒙特卡罗通量法。该方法改进了分辨率函数，简化了瞬态过程的计算。我们将设计和建造一个合适的实验装置来操作快速脉冲放电，并进行实验来证明这些模型计算。

Fast pulsed diffuse discharges are widely used for pulsed power applications such as gas lasers and switches. A goal in both fields is to reduce the rise and fall times of these discharges and to develop tools to predict their time dependent behavior. Most diffuse discharges are weakly ionized and their behavior is dominated by collisions of electrons and neutrals. The current research project is concerned with their influence of specific components in a gas mixture on the discharge characteristic and on the time dependent behavior of the discharge to allow its optimization for specific applications. This proposal addresses investigations of the transient behavior of gas discharges under the influence of fast changes of reduced electric field strength E/N and/or an electron source, S. The reduction of rise and fall times into the nansecond and sub-nanosecond region requires considering the non steady state electron kinetic and its influence on the time dependent behavior of the discharge. The work includes theoretical investigations aimed towards a description of the non equilibrium electron kinetic and experimental investigations which will allow to prove the theoretical results. The theoretical investigations are based on a new numerical method, the Monte Carlo Flux method, which is being developed. This method improves the resolution function and simplifies calculations of transient processes. A suitable experimental set up to operate fast pulsed discharges will be designed and constructed and experiments will be performed to prove these model calculations.