Fundamental Physical and Chemical Investigations of Electron-Beam Plasmas

题目：电子束等离子体的基础化学和物理研究潮湿空气中电子束等离子体的基础物理将在纽约州立大学环境科学与林业校区和密西西比州立大学进行研究。首席研究员和共同负责人还将研究这些等离子体中空气污染物破坏的基本化学机制。近红外腔衰荡光谱将用于OH自由基的分析。该自由基是启动等离子体中污染物降解的关键物种，是等离子体诊断的有力工具。除了确定三维OH浓度分布外，还将研究OH吸收光谱的线形，以确定气体的动力学温度和研究等离子体的热力学。为了深入了解限制或增强污染物破坏的因素，将测量几种具有代表性的空气污染物的破坏效率，以及其降解产物的特性和产量。这些见解将通过等离子体化学的广泛动力学建模来量化。这项研究将为潮湿空气等离子体中的化学产生有效的化学模型，这些模型将以一种有助于构建浓缩模型的方式广泛使用。这些浓缩模型可以有效地与流体动力学计算模型相结合，从而能够综合处理这些非热等离子体中的化学和输运。广泛的影响：电子束等离子体在去除气流中的污染物和毒素方面具有巨大的潜在应用，这项研究将提供一系列基础知识，为电子束等离子体的广泛应用提供支持。此外，对研究生教育的支持将产生额外的影响。

CTS-0626302 Award AbstractTitle: Fundamental Chemical and Physical Investigations of Electron-Beam PlasmasThe fundamental physics of electron-beam plasmas in humid air will be investigated at the Environmental Science and Forestry campus of SUNY and at Mississippi State University. The principal investigator and co-PI will also investigate the fundamental chemical mechanism of destruction of airborne pollutants in these plasmas. Cavity ringdown spectroscopy in the near infrared will be used to analyze OH radical.This radical is a key species for initiating degradation of pollutants in plasmas and is a powerful tool for plasma diagnostics. In addition to determining three-dimensional OH concentration distributions, lineshapes of OH absorption spectra will be studied to determine gas kinetic temperature and investigate the thermodynamics of the plasma. To obtain insights into factors limiting or enhancing destruction of pollutants, destruction efficiencies of several representative airborne pollutants will be measured, along with the identities and yields of their degradation products. These insights will be quantified with extensive kinetic modeling of the plasma chemistry.The research will produce validated chemical models for chemistry in humid air plasmas, which will be made widely available in a manner that would lend itself to the construction of condensed models. These condensed models could be combined efficiently with computational models of fluid dynamics, which, in turn, would enable integrated treatments of chemistry and transport in these non-thermal plasmas. Broad impacts: Electron-beam plasmas have enormous potential application for removing pollutants and toxins from air streams, and the research will provide a body of fundamental knowledge that will support future efforts to bring electron-beam plasmas into widespread use. In addition, support of graduate student education will provide additional impact.