Title of Poster / Presentation

Listening to Lasers: Photoacoustic Gas Sensing

Location

Portland State University

Start Date

4-5-2016 12:00 PM

End Date

4-5-2016 2:00 PM

Subjects

Photoabsorption, Chemical analysis, Laser spectroscopy

Description

Herein lies the makings of a sensor for gaseous materials due to the technique known as photo-acoustic spectroscopy. Whereby a gas filled metallic tube of known resonance has an impingement to its open aspect a beam of photons of known colour and at a specified rate such that the rate of incoming light corpuscles matches the natural standing wave frequency for the column of gas within said tube, to wit resonance. Through foresight of the molecular orbital theory and historic datums on the subject of infrared spectroscopy one naturally comes to the employment of absorbance transfiguring energy to kinetic motions within a known gas species as a mechanism for spectroscopic analysis. Many fortnights gone by a device of these humours was constructed and found not wanting in capability, this device shall henceforth be described in placard shewing and by the telling of its constructor.

Persistent Identifier

http://archives.pdx.edu/ds/psu/17159

Included in

Physics Commons

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May 4th, 12:00 PM May 4th, 2:00 PM

Listening to Lasers: Photoacoustic Gas Sensing

Portland State University

Herein lies the makings of a sensor for gaseous materials due to the technique known as photo-acoustic spectroscopy. Whereby a gas filled metallic tube of known resonance has an impingement to its open aspect a beam of photons of known colour and at a specified rate such that the rate of incoming light corpuscles matches the natural standing wave frequency for the column of gas within said tube, to wit resonance. Through foresight of the molecular orbital theory and historic datums on the subject of infrared spectroscopy one naturally comes to the employment of absorbance transfiguring energy to kinetic motions within a known gas species as a mechanism for spectroscopic analysis. Many fortnights gone by a device of these humours was constructed and found not wanting in capability, this device shall henceforth be described in placard shewing and by the telling of its constructor.