@inproceedings{f55dc564bb824678bd7a29c8ff04a330,
title = "Localization and quantification of trace-gas fugitive emissions using a portable optical spectrometer",
abstract = "We present a portable optical spectrometer for fugitive emissions monitoring of methane (CH4). The sensor operation is based on tunable diode laser absorption spectroscopy (TDLAS), using a 5 cm open path design, and targets the 2ν3 R(4) CH4 transition at 6057.1 cm-1 (1651 nm) to avoid cross-talk with common interfering atmospheric constituents. Sensitivity analysis indicates a normalized precision of 2.0 ppmv·Hz-1/2, corresponding to a noise-equivalent absorbance (NEA) of 4.4×10-6 Hz-1/2 and minimum detectible absorption (MDA) coefficient of αmin = 8.8×10-7 cm-1·Hz-1/2. Our TDLAS sensor is deployed at the Methane Emissions Technology Evaluation Center (METEC) at Colorado State University (CSU) for initial demonstration of single-sensor based source localization and quantification of CH4 fugitive emissions. The TDLAS sensor is concurrently deployed with a customized chemi-resistive metal-oxide (MOX) sensor for accuracy benchmarking, demonstrating good visual correlation of the concentration time-series. Initial angle-ofarrival (AOA) results will be shown, and development towards source magnitude estimation will be described.",
keywords = "Absorption spectroscopy, angle-of-arrival, diode laser, fugitive emissions, infrared, methane, natural gas, source estimation",
author = "Zhang, {Eric J.} and Teng, {Chu C.} and {Van Kessel}, {Theodore G.} and Levente Klein and Ramachandran Muralidhar and Chi Xiong and Yves Martin and Orcutt, {Jason S.} and Marwan Khater and Laurent Schares and Tymon Barwicz and Nathan Marchack and Swetha Kamlapurkar and Sebastian Engelmann and Gerard Wysocki and Norma Sosa and Green, {William M.J.}",
note = "Publisher Copyright: {\textcopyright} 2018 SPIE.; Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIX 2018 ; Conference date: 16-04-2018 Through 18-04-2018",
year = "2018",
doi = "10.1117/12.2305174",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Howle, {Chris R.} and Guicheteau, {Jason A.} and Fountain, {Augustus Way}",
booktitle = "Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIX",
address = "United States",
}