Emission spectra of gaseous avalanches and their time structure
Spectroscopic measurements of the emission spectra or argon/ethane and methane/ethane spectra are presented. In addition, time-resolved measurements were performed in argon/ethane, argon/methane, and methane/ethane in the vacuum ultraviolet region of the spectrum. In argon/ethane mixtures the energy...
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| container_end_page | 211 vol.1 |
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| creator | Fraga, M.M. de Lima, E.P. Ferreira Marques, R. Policarpo, A.J.P.L. Alves, M.A.F. Salete, M. Leite, S.C.P. |
| description | Spectroscopic measurements of the emission spectra or argon/ethane and methane/ethane spectra are presented. In addition, time-resolved measurements were performed in argon/ethane, argon/methane, and methane/ethane in the vacuum ultraviolet region of the spectrum. In argon/ethane mixtures the energy spectra present a complex pattern, not only as a result of the many dissociation processes that may take place but also due to the high sensitivity to the presence of impurity molecules. In argon/methane mixtures, the presence of impurities is no longer detected, probably because of the high cross section for the quenching of atomic excited states of argon by methane molecules, for high methane concentrations. In methane/ethane and in argon/methane the number of photons emitted per electron is of the same order of magnitude for the proportional mode, while in argon/ethane this number is much lower, even when operated in the SQS mode.< > |
| doi_str_mv | 10.1109/NSSMIC.1992.301197 |
| format | Conference Proceeding |
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In addition, time-resolved measurements were performed in argon/ethane, argon/methane, and methane/ethane in the vacuum ultraviolet region of the spectrum. In argon/ethane mixtures the energy spectra present a complex pattern, not only as a result of the many dissociation processes that may take place but also due to the high sensitivity to the presence of impurity molecules. In argon/methane mixtures, the presence of impurities is no longer detected, probably because of the high cross section for the quenching of atomic excited states of argon by methane molecules, for high methane concentrations. In methane/ethane and in argon/methane the number of photons emitted per electron is of the same order of magnitude for the proportional mode, while in argon/ethane this number is much lower, even when operated in the SQS mode.< ></description><identifier>ISBN: 0780308840</identifier><identifier>ISBN: 9780780308848</identifier><identifier>DOI: 10.1109/NSSMIC.1992.301197</identifier><language>eng</language><publisher>IEEE</publisher><subject>Accelerated aging ; Anodes ; Argon ; Electron emission ; Impurities ; Ion accelerators ; Ionization ; Microstrip components ; Radiation detectors ; Wire</subject><ispartof>IEEE Conference on Nuclear Science Symposium and Medical Imaging, 1992, p.209-211 vol.1</ispartof><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/301197$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>309,310,780,784,789,790,2058,4050,4051,27925,54920</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/301197$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Fraga, M.M.</creatorcontrib><creatorcontrib>de Lima, E.P.</creatorcontrib><creatorcontrib>Ferreira Marques, R.</creatorcontrib><creatorcontrib>Policarpo, A.J.P.L.</creatorcontrib><creatorcontrib>Alves, M.A.F.</creatorcontrib><creatorcontrib>Salete, M.</creatorcontrib><creatorcontrib>Leite, S.C.P.</creatorcontrib><title>Emission spectra of gaseous avalanches and their time structure</title><title>IEEE Conference on Nuclear Science Symposium and Medical Imaging</title><addtitle>NSSMIC</addtitle><description>Spectroscopic measurements of the emission spectra or argon/ethane and methane/ethane spectra are presented. In addition, time-resolved measurements were performed in argon/ethane, argon/methane, and methane/ethane in the vacuum ultraviolet region of the spectrum. In argon/ethane mixtures the energy spectra present a complex pattern, not only as a result of the many dissociation processes that may take place but also due to the high sensitivity to the presence of impurity molecules. In argon/methane mixtures, the presence of impurities is no longer detected, probably because of the high cross section for the quenching of atomic excited states of argon by methane molecules, for high methane concentrations. In methane/ethane and in argon/methane the number of photons emitted per electron is of the same order of magnitude for the proportional mode, while in argon/ethane this number is much lower, even when operated in the SQS mode.< ></description><subject>Accelerated aging</subject><subject>Anodes</subject><subject>Argon</subject><subject>Electron emission</subject><subject>Impurities</subject><subject>Ion accelerators</subject><subject>Ionization</subject><subject>Microstrip components</subject><subject>Radiation detectors</subject><subject>Wire</subject><isbn>0780308840</isbn><isbn>9780780308848</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>1992</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNp9jr0KwjAURgMi-NcX6JQXsN4YS5PJoVR00KXuJdRbG-kfuang2yvo7LecA2f5GAsFREKA3lzy_HxKI6H1NpIghE4mbAGJAglK7WDGAqIHfBbHKtZyzvZZa4ls33EasPTO8L7id0PYj8TN0zSmK2v8aHfjvkbruLctcvJuLP3ocMWmlWkIgx-XLDxk1_S4tohYDM62xr2K7xX5N74BhvA42Q</recordid><startdate>1992</startdate><enddate>1992</enddate><creator>Fraga, M.M.</creator><creator>de Lima, E.P.</creator><creator>Ferreira Marques, R.</creator><creator>Policarpo, A.J.P.L.</creator><creator>Alves, M.A.F.</creator><creator>Salete, M.</creator><creator>Leite, S.C.P.</creator><general>IEEE</general><scope>6IE</scope><scope>6IL</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIL</scope></search><sort><creationdate>1992</creationdate><title>Emission spectra of gaseous avalanches and their time structure</title><author>Fraga, M.M. ; de Lima, E.P. ; Ferreira Marques, R. ; Policarpo, A.J.P.L. ; Alves, M.A.F. ; Salete, M. ; Leite, S.C.P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-ieee_primary_3011973</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Accelerated aging</topic><topic>Anodes</topic><topic>Argon</topic><topic>Electron emission</topic><topic>Impurities</topic><topic>Ion accelerators</topic><topic>Ionization</topic><topic>Microstrip components</topic><topic>Radiation detectors</topic><topic>Wire</topic><toplevel>online_resources</toplevel><creatorcontrib>Fraga, M.M.</creatorcontrib><creatorcontrib>de Lima, E.P.</creatorcontrib><creatorcontrib>Ferreira Marques, R.</creatorcontrib><creatorcontrib>Policarpo, A.J.P.L.</creatorcontrib><creatorcontrib>Alves, M.A.F.</creatorcontrib><creatorcontrib>Salete, M.</creatorcontrib><creatorcontrib>Leite, S.C.P.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan All Online (POP All Online) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP All) 1998-Present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Fraga, M.M.</au><au>de Lima, E.P.</au><au>Ferreira Marques, R.</au><au>Policarpo, A.J.P.L.</au><au>Alves, M.A.F.</au><au>Salete, M.</au><au>Leite, S.C.P.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Emission spectra of gaseous avalanches and their time structure</atitle><btitle>IEEE Conference on Nuclear Science Symposium and Medical Imaging</btitle><stitle>NSSMIC</stitle><date>1992</date><risdate>1992</risdate><spage>209</spage><epage>211 vol.1</epage><pages>209-211 vol.1</pages><isbn>0780308840</isbn><isbn>9780780308848</isbn><abstract>Spectroscopic measurements of the emission spectra or argon/ethane and methane/ethane spectra are presented. In addition, time-resolved measurements were performed in argon/ethane, argon/methane, and methane/ethane in the vacuum ultraviolet region of the spectrum. In argon/ethane mixtures the energy spectra present a complex pattern, not only as a result of the many dissociation processes that may take place but also due to the high sensitivity to the presence of impurity molecules. In argon/methane mixtures, the presence of impurities is no longer detected, probably because of the high cross section for the quenching of atomic excited states of argon by methane molecules, for high methane concentrations. In methane/ethane and in argon/methane the number of photons emitted per electron is of the same order of magnitude for the proportional mode, while in argon/ethane this number is much lower, even when operated in the SQS mode.< ></abstract><pub>IEEE</pub><doi>10.1109/NSSMIC.1992.301197</doi></addata></record> |
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| ispartof | IEEE Conference on Nuclear Science Symposium and Medical Imaging, 1992, p.209-211 vol.1 |
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| language | eng |
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| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Accelerated aging Anodes Argon Electron emission Impurities Ion accelerators Ionization Microstrip components Radiation detectors Wire |
| title | Emission spectra of gaseous avalanches and their time structure |
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