优化混合旋转飞秒/皮秒相干反斯托克斯拉曼光谱（HR-CARS）
Optimising hybrid rotational femtosecond/picosecond coherent anti-Stokes Raman spectroscopy (HR-CARS) in nitrogen at high pressures and temperatures
摘要：
我们证明了使用混合旋转飞秒/皮秒（fs/ps）相干反斯托克斯拉曼光谱（HR-CARS）作为一种技术，在氮气中的温度测量在高压和高温。在压力为1-70 atm、温度为300-1000 K的含氮池中，宽带脉冲整形器调节的42 fs脉冲与窄带宽、频率上转换的5.5 ps脉冲相互作用。计算代码用于模拟光谱和拟合实验结果，以获得最佳拟合温度。我们证明了良好的定性拟合以及良好的准确度和精度之间的热电偶测量和最佳拟合温度在探索的压力和温度制度。热电偶测量值与最佳拟合温度之间的总体平均百分比温差为-0.3%，标准偏差为7.1%，表明HR-CARS适用于表征高压和高温环境。
英文摘要：
We demonstrate the use of hybrid rotational femtosecond/picosecond (fs/ps) coherent anti-Stokes Raman spectroscopy (HR-CARS) as a technique for temperature measurements in nitrogen gas at high pressures and temperatures. A broadband pulse shaper-adjusted 42 fs pulse interacts with a narrow-bandwidth, frequency-upconverted 5.5 ps pulse in a cell containing nitrogen at pressures of 1-70 atm and temperatures of 300-1000 K. A computational code is used to model spectra and fit experimental results to obtain best-fit temperatures. We demonstrate good qualitative fits as well as good accuracy and precision between thermocouple measured and best-fit temperatures over the explored pressure and temperature regimes. The overall average percentage temperature difference between thermocouple measurements and best-fit temperatures is -0.3% with a standard deviation of 7.1%, showing the suitability of HR-CARS for characterising high pressure and temperature environments.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
