Loading…

Sulfur hexafluoride (SF6) trace gas sensing using modulated CO2 laser beam

Sulfur hexafluoride gas (SF6) is a very important in high voltage equipment as a spark arrestor medium for switch gear assemblies. Laser-based Photo-Acoustic (PA) technique has been used to monitor the traces of SF6 leaks in the surrounding atmosphere. This technique is based on inducing acoustic wa...

Full description

Saved in:
Bibliographic Details
Published in:Iraqi Journal of Laser : a Referred Scientific Journal. 2018, Vol.17 (A), p.9-15
Main Authors: Husayn, Muhammad Abd al-Amir, Ahmad, Sarah Sami
Format: Article
Language:ara ; eng
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by
cites
container_end_page 15
container_issue A
container_start_page 9
container_title Iraqi Journal of Laser : a Referred Scientific Journal.
container_volume 17
creator Husayn, Muhammad Abd al-Amir
Ahmad, Sarah Sami
description Sulfur hexafluoride gas (SF6) is a very important in high voltage equipment as a spark arrestor medium for switch gear assemblies. Laser-based Photo-Acoustic (PA) technique has been used to monitor the traces of SF6 leaks in the surrounding atmosphere. This technique is based on inducing acoustic waves in the gas which is stimulated by a modulated (CW) CO2 laser beam of 10.6μm wavelength, 1.0 to 2.5W power and power modulation frequency of 1365 to 10920Hz (1st to 8th harmonics). A cylindrical acoustic resonator of 50mm length and 4.5mm diameter is used, with a miniature microphone mounted at its midpoint to detect the sound waves. A sound monitoring computer software (Sound Card Oscilloscope V4.1) has been used to capture and record the sound waves and their frequency spectrums. Experimental results revealed that significant acoustic signal can be detected even at trace concentration, this is attributed to the high absorption of the CO2 laser radiation by SF6 gas. Also, it conforms very well to the laser modulation frequency applied to the resonator, with a tendency to oscillate at higher harmonics when higher concentrations of SF6 exist within the gas mixture. The strongest line of oscillation has been statistically found to be the 4th harmonic (5460Hz).
format article
fullrecord <record><control><sourceid>emarefa</sourceid><recordid>TN_cdi_emarefa_primary_839652</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>839652</sourcerecordid><originalsourceid>FETCH-emarefa_primary_8396523</originalsourceid><addsrcrecordid>eNqFibEKwjAUADMoWLSfILxRh0KT0tjOxSIuDnUvr-alBtJWkgb07xVxd7k7uAWLeMFFwnmZr1jsvelSIfNSyvQQsXMTrA4O7vREbcPkjCLYNbXcw-zwRtCjB0-jN2MP4cthUsHiTAqqiwCLnhx0hMOGLTVaT_HPa7atj9fqlNCAjjS2D2c-9WqLrJS5yP79N5t0OAU</addsrcrecordid><sourcetype>Publisher</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Sulfur hexafluoride (SF6) trace gas sensing using modulated CO2 laser beam</title><source>EZB Free E-Journals</source><creator>Husayn, Muhammad Abd al-Amir ; Ahmad, Sarah Sami</creator><creatorcontrib>Husayn, Muhammad Abd al-Amir ; Ahmad, Sarah Sami</creatorcontrib><description>Sulfur hexafluoride gas (SF6) is a very important in high voltage equipment as a spark arrestor medium for switch gear assemblies. Laser-based Photo-Acoustic (PA) technique has been used to monitor the traces of SF6 leaks in the surrounding atmosphere. This technique is based on inducing acoustic waves in the gas which is stimulated by a modulated (CW) CO2 laser beam of 10.6μm wavelength, 1.0 to 2.5W power and power modulation frequency of 1365 to 10920Hz (1st to 8th harmonics). A cylindrical acoustic resonator of 50mm length and 4.5mm diameter is used, with a miniature microphone mounted at its midpoint to detect the sound waves. A sound monitoring computer software (Sound Card Oscilloscope V4.1) has been used to capture and record the sound waves and their frequency spectrums. Experimental results revealed that significant acoustic signal can be detected even at trace concentration, this is attributed to the high absorption of the CO2 laser radiation by SF6 gas. Also, it conforms very well to the laser modulation frequency applied to the resonator, with a tendency to oscillate at higher harmonics when higher concentrations of SF6 exist within the gas mixture. The strongest line of oscillation has been statistically found to be the 4th harmonic (5460Hz).</description><identifier>ISSN: 1812-1195</identifier><language>ara ; eng</language><publisher>Baghdad, Iraq: University of Baghdad, Institute of Laser and Plasma for Postgraduate Studies</publisher><ispartof>Iraqi Journal of Laser : a Referred Scientific Journal., 2018, Vol.17 (A), p.9-15</ispartof><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784</link.rule.ids></links><search><creatorcontrib>Husayn, Muhammad Abd al-Amir</creatorcontrib><creatorcontrib>Ahmad, Sarah Sami</creatorcontrib><title>Sulfur hexafluoride (SF6) trace gas sensing using modulated CO2 laser beam</title><title>Iraqi Journal of Laser : a Referred Scientific Journal.</title><description>Sulfur hexafluoride gas (SF6) is a very important in high voltage equipment as a spark arrestor medium for switch gear assemblies. Laser-based Photo-Acoustic (PA) technique has been used to monitor the traces of SF6 leaks in the surrounding atmosphere. This technique is based on inducing acoustic waves in the gas which is stimulated by a modulated (CW) CO2 laser beam of 10.6μm wavelength, 1.0 to 2.5W power and power modulation frequency of 1365 to 10920Hz (1st to 8th harmonics). A cylindrical acoustic resonator of 50mm length and 4.5mm diameter is used, with a miniature microphone mounted at its midpoint to detect the sound waves. A sound monitoring computer software (Sound Card Oscilloscope V4.1) has been used to capture and record the sound waves and their frequency spectrums. Experimental results revealed that significant acoustic signal can be detected even at trace concentration, this is attributed to the high absorption of the CO2 laser radiation by SF6 gas. Also, it conforms very well to the laser modulation frequency applied to the resonator, with a tendency to oscillate at higher harmonics when higher concentrations of SF6 exist within the gas mixture. The strongest line of oscillation has been statistically found to be the 4th harmonic (5460Hz).</description><issn>1812-1195</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqFibEKwjAUADMoWLSfILxRh0KT0tjOxSIuDnUvr-alBtJWkgb07xVxd7k7uAWLeMFFwnmZr1jsvelSIfNSyvQQsXMTrA4O7vREbcPkjCLYNbXcw-zwRtCjB0-jN2MP4cthUsHiTAqqiwCLnhx0hMOGLTVaT_HPa7atj9fqlNCAjjS2D2c-9WqLrJS5yP79N5t0OAU</recordid><startdate>2018</startdate><enddate>2018</enddate><creator>Husayn, Muhammad Abd al-Amir</creator><creator>Ahmad, Sarah Sami</creator><general>University of Baghdad, Institute of Laser and Plasma for Postgraduate Studies</general><scope>ADJCN</scope><scope>AHFXO</scope></search><sort><creationdate>2018</creationdate><title>Sulfur hexafluoride (SF6) trace gas sensing using modulated CO2 laser beam</title><author>Husayn, Muhammad Abd al-Amir ; Ahmad, Sarah Sami</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-emarefa_primary_8396523</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>ara ; eng</language><creationdate>2018</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Husayn, Muhammad Abd al-Amir</creatorcontrib><creatorcontrib>Ahmad, Sarah Sami</creatorcontrib><collection>الدوريات العلمية والإحصائية - e-Marefa Academic and Statistical Periodicals</collection><collection>معرفة - المحتوى العربي الأكاديمي المتكامل - e-Marefa Academic Complete</collection><jtitle>Iraqi Journal of Laser : a Referred Scientific Journal.</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Husayn, Muhammad Abd al-Amir</au><au>Ahmad, Sarah Sami</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sulfur hexafluoride (SF6) trace gas sensing using modulated CO2 laser beam</atitle><jtitle>Iraqi Journal of Laser : a Referred Scientific Journal.</jtitle><date>2018</date><risdate>2018</risdate><volume>17</volume><issue>A</issue><spage>9</spage><epage>15</epage><pages>9-15</pages><issn>1812-1195</issn><abstract>Sulfur hexafluoride gas (SF6) is a very important in high voltage equipment as a spark arrestor medium for switch gear assemblies. Laser-based Photo-Acoustic (PA) technique has been used to monitor the traces of SF6 leaks in the surrounding atmosphere. This technique is based on inducing acoustic waves in the gas which is stimulated by a modulated (CW) CO2 laser beam of 10.6μm wavelength, 1.0 to 2.5W power and power modulation frequency of 1365 to 10920Hz (1st to 8th harmonics). A cylindrical acoustic resonator of 50mm length and 4.5mm diameter is used, with a miniature microphone mounted at its midpoint to detect the sound waves. A sound monitoring computer software (Sound Card Oscilloscope V4.1) has been used to capture and record the sound waves and their frequency spectrums. Experimental results revealed that significant acoustic signal can be detected even at trace concentration, this is attributed to the high absorption of the CO2 laser radiation by SF6 gas. Also, it conforms very well to the laser modulation frequency applied to the resonator, with a tendency to oscillate at higher harmonics when higher concentrations of SF6 exist within the gas mixture. The strongest line of oscillation has been statistically found to be the 4th harmonic (5460Hz).</abstract><cop>Baghdad, Iraq</cop><pub>University of Baghdad, Institute of Laser and Plasma for Postgraduate Studies</pub><tpages>7</tpages></addata></record>
fulltext fulltext
identifier ISSN: 1812-1195
ispartof Iraqi Journal of Laser : a Referred Scientific Journal., 2018, Vol.17 (A), p.9-15
issn 1812-1195
language ara ; eng
recordid cdi_emarefa_primary_839652
source EZB Free E-Journals
title Sulfur hexafluoride (SF6) trace gas sensing using modulated CO2 laser beam
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-04T06%3A32%3A29IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-emarefa&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Sulfur%20hexafluoride%20(SF6)%20trace%20gas%20sensing%20using%20modulated%20CO2%20laser%20beam&rft.jtitle=Iraqi%20Journal%20of%20Laser%20:%20a%20Referred%20Scientific%20Journal.&rft.au=Husayn,%20Muhammad%20Abd%20al-Amir&rft.date=2018&rft.volume=17&rft.issue=A&rft.spage=9&rft.epage=15&rft.pages=9-15&rft.issn=1812-1195&rft_id=info:doi/&rft_dat=%3Cemarefa%3E839652%3C/emarefa%3E%3Cgrp_id%3Ecdi_FETCH-emarefa_primary_8396523%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true