Measurements of electron density and temperature in the H-1 heliac plasma by helium line intensity ratios
Electron density and temperature distributions in the H-1 heliac plasma are measured using the helium line intensity ratio technique based on a collisional-radiative model. An inversion approach with minimum Fisher regularization is developed to reconstruct the ratios of the local emission radiances...
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| Veröffentlicht in: | Review of scientific instruments 2012-03, Vol.83 (3), p.033102-033102-7 |
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| container_end_page | 033102-7 |
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| container_issue | 3 |
| container_start_page | 033102 |
| container_title | Review of scientific instruments |
| container_volume | 83 |
| creator | Ma, Shuiliang Howard, John Blackwell, Boyd D. Thapar, Nandika |
| description | Electron density and temperature distributions in the H-1 heliac plasma are measured using the helium line intensity ratio technique based on a collisional-radiative model. An inversion approach with minimum Fisher regularization is developed to reconstruct the ratios of the local emission radiances from detected line-integrated intensities. The electron density and temperature inferred from the He I 667.8/728.1 and He I 728.1/706.5 nm line ratios are in good agreement with those from other diagnostic techniques in the inner region of the plasma. The electron density and temperature values appear to be a little high in the outer region of the plasma. Some possible causes of the discrepancy in the outer region are discussed. |
| doi_str_mv | 10.1063/1.3692756 |
| format | Article |
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An inversion approach with minimum Fisher regularization is developed to reconstruct the ratios of the local emission radiances from detected line-integrated intensities. The electron density and temperature inferred from the He I 667.8/728.1 and He I 728.1/706.5 nm line ratios are in good agreement with those from other diagnostic techniques in the inner region of the plasma. The electron density and temperature values appear to be a little high in the outer region of the plasma. Some possible causes of the discrepancy in the outer region are discussed.</description><identifier>ISSN: 0034-6748</identifier><identifier>EISSN: 1089-7623</identifier><identifier>DOI: 10.1063/1.3692756</identifier><identifier>PMID: 22462901</identifier><identifier>CODEN: RSINAK</identifier><language>eng</language><publisher>United States: American Institute of Physics</publisher><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY ; ELECTRON DENSITY ; ELECTRON TEMPERATURE ; H-1 HELIAC ; HELIUM ; INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ; PLASMA ; PLASMA DIAGNOSTICS ; TEMPERATURE DISTRIBUTION</subject><ispartof>Review of scientific instruments, 2012-03, Vol.83 (3), p.033102-033102-7</ispartof><rights>2012 American Institute of Physics</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c433t-1644dcf67342c782012a0f5e3142877832a5440740ffc53d0180e5825ab8f6663</citedby><cites>FETCH-LOGICAL-c433t-1644dcf67342c782012a0f5e3142877832a5440740ffc53d0180e5825ab8f6663</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/rsi/article-lookup/doi/10.1063/1.3692756$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>230,314,780,784,794,885,1559,4512,27924,27925,76384,76390</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22462901$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/22072253$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Ma, Shuiliang</creatorcontrib><creatorcontrib>Howard, John</creatorcontrib><creatorcontrib>Blackwell, Boyd D.</creatorcontrib><creatorcontrib>Thapar, Nandika</creatorcontrib><title>Measurements of electron density and temperature in the H-1 heliac plasma by helium line intensity ratios</title><title>Review of scientific instruments</title><addtitle>Rev Sci Instrum</addtitle><description>Electron density and temperature distributions in the H-1 heliac plasma are measured using the helium line intensity ratio technique based on a collisional-radiative model. An inversion approach with minimum Fisher regularization is developed to reconstruct the ratios of the local emission radiances from detected line-integrated intensities. The electron density and temperature inferred from the He I 667.8/728.1 and He I 728.1/706.5 nm line ratios are in good agreement with those from other diagnostic techniques in the inner region of the plasma. The electron density and temperature values appear to be a little high in the outer region of the plasma. Some possible causes of the discrepancy in the outer region are discussed.</description><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</subject><subject>ELECTRON DENSITY</subject><subject>ELECTRON TEMPERATURE</subject><subject>H-1 HELIAC</subject><subject>HELIUM</subject><subject>INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY</subject><subject>PLASMA</subject><subject>PLASMA DIAGNOSTICS</subject><subject>TEMPERATURE DISTRIBUTION</subject><issn>0034-6748</issn><issn>1089-7623</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp10U1PwyAcBnBiNDqnB7-AIfFgPFR5K3QXE7P4lsx40TNh9E-GaWEWeti3t3XTeJELCfnxAA8InVFyTYnkN_SayxlTpdxDE0qqWaEk4_toQggXhVSiOkLHKX2QYZSUHqIjxoRkM0InyL-ASX0HLYSccHQYGrC5iwHXEJLPG2xCjTO0a-hMHiD2AecV4KeC4hU03li8bkxqDV5uvhf6Fjc-jC7vEoaNPqYTdOBMk-B0N0_R-8P92_ypWLw-Ps_vFoUVnOeCSiFq66TigllVMUKZIa4ETgWrlKo4M6UQRAninC15TWhFoKxYaZaVk1LyKbrY5saUvU7WZ7ArG0MY3qUZI4qxkg_qcqvWXfzsIWXd-mShaUyA2Cc9k3w4StJRXm2l7WJKHTi97nxruo2mRI_1a6p39Q_2fJfaL1uof-VP3wO43YLxXmMt4f-0vz-jo9Pjz_Avv8WTKw</recordid><startdate>20120301</startdate><enddate>20120301</enddate><creator>Ma, Shuiliang</creator><creator>Howard, John</creator><creator>Blackwell, Boyd D.</creator><creator>Thapar, Nandika</creator><general>American Institute of Physics</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>OTOTI</scope></search><sort><creationdate>20120301</creationdate><title>Measurements of electron density and temperature in the H-1 heliac plasma by helium line intensity ratios</title><author>Ma, Shuiliang ; Howard, John ; Blackwell, Boyd D. ; Thapar, Nandika</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c433t-1644dcf67342c782012a0f5e3142877832a5440740ffc53d0180e5825ab8f6663</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</topic><topic>ELECTRON DENSITY</topic><topic>ELECTRON TEMPERATURE</topic><topic>H-1 HELIAC</topic><topic>HELIUM</topic><topic>INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY</topic><topic>PLASMA</topic><topic>PLASMA DIAGNOSTICS</topic><topic>TEMPERATURE DISTRIBUTION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ma, Shuiliang</creatorcontrib><creatorcontrib>Howard, John</creatorcontrib><creatorcontrib>Blackwell, Boyd D.</creatorcontrib><creatorcontrib>Thapar, Nandika</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Review of scientific instruments</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ma, Shuiliang</au><au>Howard, John</au><au>Blackwell, Boyd D.</au><au>Thapar, Nandika</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Measurements of electron density and temperature in the H-1 heliac plasma by helium line intensity ratios</atitle><jtitle>Review of scientific instruments</jtitle><addtitle>Rev Sci Instrum</addtitle><date>2012-03-01</date><risdate>2012</risdate><volume>83</volume><issue>3</issue><spage>033102</spage><epage>033102-7</epage><pages>033102-033102-7</pages><issn>0034-6748</issn><eissn>1089-7623</eissn><coden>RSINAK</coden><abstract>Electron density and temperature distributions in the H-1 heliac plasma are measured using the helium line intensity ratio technique based on a collisional-radiative model. An inversion approach with minimum Fisher regularization is developed to reconstruct the ratios of the local emission radiances from detected line-integrated intensities. The electron density and temperature inferred from the He I 667.8/728.1 and He I 728.1/706.5 nm line ratios are in good agreement with those from other diagnostic techniques in the inner region of the plasma. The electron density and temperature values appear to be a little high in the outer region of the plasma. Some possible causes of the discrepancy in the outer region are discussed.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><pmid>22462901</pmid><doi>10.1063/1.3692756</doi><tpages>1</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0034-6748 |
| ispartof | Review of scientific instruments, 2012-03, Vol.83 (3), p.033102-033102-7 |
| issn | 0034-6748 1089-7623 |
| language | eng |
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| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY ELECTRON DENSITY ELECTRON TEMPERATURE H-1 HELIAC HELIUM INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY PLASMA PLASMA DIAGNOSTICS TEMPERATURE DISTRIBUTION |
| title | Measurements of electron density and temperature in the H-1 heliac plasma by helium line intensity ratios |
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