用于在大气中通过热解离的H2O进行OH激光诱导荧光密度测量的校准源。

Calibration source for OH laser-induced fluorescence-density measurements with thermally dissociated H2O in atmospheric air.

作者信息

Grinstead J H, Laufer G, Krauss R H, McDaniel J C

出版信息

Appl Opt. 1994 Feb 20;33(6):1115-9. doi: 10.1364/AO.33.001115.

DOI:10.1364/AO.33.001115

PMID:20862126

Abstract

A calibration technique for OH laser-induced fluorescence (LIF) density measurements through the use of the thermal dissociation of ambient H(2)O in an atmospheric air furnace with a tunable KrF laser has been demonstrated. The stable and uniform concentration of OH produced in the furnace permits direct calibration of LIF signals without the uncertainties associated with reference flames. The presence of OH in atmospheric air that is heated to temperatures exceeding 1500 K is sufficient for LIF measurements with most OH LIF laser systems. The measured OH density is found to agree well with the computed OH chemical-equilibrium density over a temperature range of 1500-1850 K.

摘要

通过使用可调谐KrF激光在大气空气炉中利用环境H₂O的热解离来进行OH激光诱导荧光（LIF）密度测量的校准技术已经得到了验证。炉中产生的OH浓度稳定且均匀，这使得可以直接校准LIF信号，而无需担心与参考火焰相关的不确定性。在加热到超过1500 K的大气空气中，OH的存在足以使用大多数OH LIF激光系统进行LIF测量。发现在1500 - 1850 K的温度范围内，测量得到的OH密度与计算得到的OH化学平衡密度非常吻合。