Blake T A, Chackerian C, Podolske J R
Appl Opt. 1996 Feb 20;35(6):973-85. doi: 10.1364/AO.35.000973.
Mid-infrared magnetic rotation spectroscopy (MRS) experiments on nitric oxide (NO) are quantitatively modeled by theoretical calculations. The verified theory is used to specify an instrument that can make in situ measurements on NO and NO(2) in the Earth's atmosphere at a sensitivity level of a few parts in 10(12) by volume per second. The prototype instrument used in the experiments has an extrapolated detection limit for NO of 30 parts in 10(9) for a 1-s integration time over a 12-cm path length. The detection limit is an extrapolation of experimental results to a signal-to-noise ratio of one, where the noise is considered to be one-half the peak-to-peak baseline noise. Also discussed are the various factors that can limit the sensitivity of a MRS spectrometer that uses liquid-nitrogen-cooled lead-salt diode lasers and photovoltaic detectors.
通过理论计算对一氧化氮（NO）的中红外磁旋转光谱（MRS）实验进行了定量建模。经过验证的理论被用于指定一种仪器，该仪器能够以每秒体积分数为10⁻¹²的几分之一的灵敏度对地球大气中的NO和NO₂进行原位测量。实验中使用的原型仪器在12厘米光程上1秒积分时间内对NO的外推检测限为10⁻⁹中的30份。该检测限是将实验结果外推到信噪比为1的情况，其中噪声被认为是峰峰值基线噪声的一半。还讨论了各种可能限制使用液氮冷却的铅盐二极管激光器和光伏探测器的MRS光谱仪灵敏度的因素。
