Engineering Research Equipment: High Speed Data Acquisition/Analysis System

这笔设备拨款将用于获取高速数据采集和分析系统，该系统将与现有的5纳秒脉冲宽度激光器一起用于燃烧研究。该系统将允许在现有的简并四波混合激光燃烧诊断的5纳秒脉冲宽度上获取足够的数据，以确定系统的时间响应。除了获取数据外，该系统还将处理这些信息，以提供燃烧诊断系统性能的实时测量。在最初的应用中，该数据采集系统将集成到基于原位脉冲激光的诊断中，用于测量碳氢化合物燃烧过程中产生的羟基自由基。该技术利用HO2的低洼吸收带的简并四波混合，这是该分子所特有的，在电磁波谱的指纹区没有与该分子的其他吸收带相关的光谱干扰问题。该研究项目的成功完成将为探索碳氢化合物氧化提供一种新的诊断工具，并为限制效率和控制碳氢化合物燃烧系统排放的化学提供新的见解。

This equipment grant will be used for acquisition of a high- speed data acquisition and analysis system which will be used with an existing five nanosecond pulse-width laser for combustion studies. The system will allow for acquisition of sufficient data over the 5 nanosecond pulse width of an existing degenerate four-wave mixing laser combustion diagnostic to determine the temporal response of the system. In addition to acquiring the data, this system will process the information to provide a real-time measure of the performance of the combustion diagnostic system. In its initial application, this data acquisition system will be integrated into an in-situ pulse laser based diagnostic for measurement of hydroperoxy radicals generated during the combustion of hydrocarbons. This technique utilizes degenerate four-wave mixing of a low-lying absorption band of HO2 which is unique to that molecule, not having the spectroscopic interference problems associated with other absorption bands of this molecule in the fingerprint region of the electromagnetic spectrum. Successful completion of this research program will provide a new diagnostic tool to probe hydrocarbon oxidation and provide new insight into the chemistry which limits efficiency and controls emissions from hydrocarbon combustion systems.