Studies of Optically Pumped High-Pressure Nonequalibrium Plasmas

光泵浦高压非平衡等离子体的研究

• 批准号: 0078079
• 负责人: Walter Lempert
• 金额: $ 31.2万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0078079&HistoricalAwards=false
• 关键词: Studies; Optically; Pumped; Pressure; Nonequalibrium

The main thrust of this project is an in-depth experimental and theoretical study of the use of optical pumping, as an alternative to direct electron impact ionization, for the production of low translational temperature (of the order of 500 K), highly non-equilibrium, high-pressure plasmas. The approach is based on the combination of resonant absorption of continuous wave infrared radiation from a CO laser with anharmonic collisional vibration-vibration energy transfer. The work will investigate the following questions: 1) What is the principal mechanism and the rate of free electron loss in these systems? 2) Can the electron density be increased efficiently while maintaining unconditional stability? and 3) How quantitatively can the coupling between free electrons and the vibrational mode be predicted?

该项目的主旨是对使用光泵浦进行深入的实验和理论研究，作为直接电子碰撞电离的替代方法，用于产生低平移温度（约500 K）、高度非平衡、高压等离子体。 该方法是基于从CO激光器的连续波红外辐射的共振吸收与非谐碰撞振动振动能量转移的组合。 本工作将探讨以下问题：1）在这些系统中，自由电子损失的主要机制和速率是什么？ 2)在保持无条件稳定性的同时，电子密度能否有效地增加？3）自由电子与振动模之间的耦合能在多大程度上被定量预测？