Electron density measurements in shock tube using microwave interferometry
Microwave interferometry (MWI) is a nonintrusive diagnostic technique, capable of measuring small quantities of electrons present in a flame plasma. In this paper, a 94 GHz microwave interferometer is characterized and validated to perform robust and reliable measurements of electron concentrations...
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| Veröffentlicht in: | Review of scientific instruments 2019-05, Vol.90 (5), p.054706-054706 |
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| creator | Toujani, Nesrine Alquaity, Awad Bin Saud Farooq, Aamir |
| description | Microwave interferometry (MWI) is a nonintrusive diagnostic technique, capable of measuring small quantities of electrons present in a flame plasma. In this paper, a 94 GHz microwave interferometer is characterized and validated to perform robust and reliable measurements of electron concentrations in thermal and nonthermal plasmas in a shock tube. The MWI system is validated first by measuring the refractive index of a dielectric material. Subsequently, the system is used for measuring electron densities during the thermal ionization of argon and krypton in shock tube experiments. The measured activation energies are in good agreement with both the measured values from previous studies and theoretical values. The MWI system is finally used for measuring electron density time-histories in fuel oxidation experiments in the shock tube. The electron density profile of methane combustion shows a peak at the ignition time which agrees with pressure measurements. Experimental electron histories are also in overall agreement with predictions of the methane ion chemistry model. |
| doi_str_mv | 10.1063/1.5086854 |
| format | Article |
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Experimental electron histories are also in overall agreement with predictions of the methane ion chemistry model.</description><subject>Argon</subject><subject>Diagnostic systems</subject><subject>Electron density measurement</subject><subject>Electron density profiles</subject><subject>Interferometry</subject><subject>Ionization</subject><subject>Krypton</subject><subject>Methane</subject><subject>Organic chemistry</subject><subject>Oxidation</subject><subject>Plasma</subject><subject>Plasmas (physics)</subject><subject>Refractivity</subject><subject>Scientific apparatus & instruments</subject><issn>0034-6748</issn><issn>1089-7623</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp90MtKxDAUBuAgio6XhS8gBTcqdOzJrelSxCsDbnRd0uRUq9NmTNKReXs7zKggaDYh5OPnnJ-QQ8jGkEl2DmORKakE3yAjyFSR5pKyTTLKMsZTmXO1Q3ZDeM2GIwC2yQ4DEIwyGJH7qyma6F2XWOxCExdJizr0HlvsYkiaLgkvzrwlsa8w6UPTPSdtY7z70HMcfiP6Gr1rMfrFPtmq9TTgwfreI0_XV4-Xt-nk4ebu8mKSGg4qpgp1rQtbKAo1l7laPriVFWOFMFZLk1eywtwUgmJumeaKGhAIHNFWFoDtkZNV7sy79x5DLNsmGJxOdYeuDyWljHNVUEEHevyLvrred8N0g6KSAlViGXi6UsNeIXisy5lvWu0XJWTlsuASynXBgz1aJ_ZVi_ZbfjU6gLMVCKaJOjau-zftTzx3_geWM1uzT-vWkgQ</recordid><startdate>201905</startdate><enddate>201905</enddate><creator>Toujani, Nesrine</creator><creator>Alquaity, Awad Bin Saud</creator><creator>Farooq, Aamir</creator><general>American Institute of Physics</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0003-1167-8012</orcidid><orcidid>https://orcid.org/0000-0002-9306-0154</orcidid><orcidid>https://orcid.org/0000-0001-5296-2197</orcidid><orcidid>https://orcid.org/0000000311678012</orcidid><orcidid>https://orcid.org/0000000293060154</orcidid><orcidid>https://orcid.org/0000000152962197</orcidid></search><sort><creationdate>201905</creationdate><title>Electron density measurements in shock tube using microwave interferometry</title><author>Toujani, Nesrine ; Alquaity, Awad Bin Saud ; Farooq, Aamir</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c418t-8eafa9d9821f4678fa9d4d6b3395cda6c7b6be7c952e7d3a482c15e14eedbd113</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Argon</topic><topic>Diagnostic systems</topic><topic>Electron density measurement</topic><topic>Electron density profiles</topic><topic>Interferometry</topic><topic>Ionization</topic><topic>Krypton</topic><topic>Methane</topic><topic>Organic chemistry</topic><topic>Oxidation</topic><topic>Plasma</topic><topic>Plasmas (physics)</topic><topic>Refractivity</topic><topic>Scientific apparatus & instruments</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Toujani, Nesrine</creatorcontrib><creatorcontrib>Alquaity, Awad Bin Saud</creatorcontrib><creatorcontrib>Farooq, Aamir</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Review of scientific instruments</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Toujani, Nesrine</au><au>Alquaity, Awad Bin Saud</au><au>Farooq, Aamir</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electron density measurements in shock tube using microwave interferometry</atitle><jtitle>Review of scientific instruments</jtitle><addtitle>Rev Sci Instrum</addtitle><date>2019-05</date><risdate>2019</risdate><volume>90</volume><issue>5</issue><spage>054706</spage><epage>054706</epage><pages>054706-054706</pages><issn>0034-6748</issn><eissn>1089-7623</eissn><coden>RSINAK</coden><abstract>Microwave interferometry (MWI) is a nonintrusive diagnostic technique, capable of measuring small quantities of electrons present in a flame plasma. 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| ispartof | Review of scientific instruments, 2019-05, Vol.90 (5), p.054706-054706 |
| issn | 0034-6748 1089-7623 |
| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Argon Diagnostic systems Electron density measurement Electron density profiles Interferometry Ionization Krypton Methane Organic chemistry Oxidation Plasma Plasmas (physics) Refractivity Scientific apparatus & instruments |
| title | Electron density measurements in shock tube using microwave interferometry |
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