High Speed, Ultrasensitive Trace Gas Sensing

Long, David A.

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https://hdl.handle.net/2142/50937 Copy

Description

Title

High Speed, Ultrasensitive Trace Gas Sensing

Author(s)

Long, David A.

Contributor(s)

• Hodges, Joseph
• Plusquellic, David F.
• Fleisher, Adam J.

Issue Date

2014-06-16

Keyword(s)

Analytical, Combustion, Plasma

Abstract

I will describe a variety of cavity-enhanced spectroscopic techniques, including frequency-agile rapid scanning spectroscopy (FARS) and heterodyne-detected cavity ring-down spectroscopy (HD-CRDS), which we have recently developed for rapid, ultrasensitive absorption measurements. Scanning rates that are limited only by the cavity response time itself as well as noise-equivalent detection limits as low as $6\times10^{-14}$ cm$^{-1}$ Hz$^{-1/2}$ have been achieved. I will discuss the application of these techniques to current problems in atmospheric science including recent infrared measurements of analytes which are present at ultra-trace concentrations.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50937

DOI

https://doi.org/10.15278/isms.2014.MJ02

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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