A study of tungsten migration in the Alcator C-Mod divertor
A toroidally-continuous row of bulk tungsten (W) tiles was installed near the typical location of the outer strike-point in the Alcator C-Mod divertor and was removed for analysis after two campaigns (3151 plasma discharges). External beam (in-air) particle induced X-ray emission (PIXE) analysis has...
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| Veröffentlicht in: | Journal of nuclear materials 2011-08, Vol.415 (1), p.S301-S304 |
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| container_end_page | S304 |
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| container_title | Journal of nuclear materials |
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| creator | Barnard, H.S. Lipschultz, B. Whyte, D.G. |
| description | A toroidally-continuous row of bulk tungsten (W) tiles was installed near the typical location of the outer strike-point in the Alcator C-Mod divertor and was removed for analysis after two campaigns (3151 plasma discharges). External beam (in-air) particle induced X-ray emission (PIXE) analysis has been used to observe campaign-integrated W migration patterns in the otherwise Mo divertor using the W as a tracer for divertor erosion and transport. With a set of high spatial resolution PIXE measurements (∼3mm resolution), poloidal profiles of W migration have been constructed. Redeposition of up to 1.5×1021atoms/m2 (∼20nm equivalent thickness) is observed on the outer and inner divertor, and in the private-flux region. The campaign-integrated deposition on the analyzed tiles corresponds to net W erosion of ∼60nm (>0.014nm/s). The migration profiles indicate sputtering and prompt redeposition in the outer divertor, neutral and ion transport through the private–flux region, and transport in the scrape off layer. |
| doi_str_mv | 10.1016/j.jnucmat.2010.12.317 |
| format | Article |
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External beam (in-air) particle induced X-ray emission (PIXE) analysis has been used to observe campaign-integrated W migration patterns in the otherwise Mo divertor using the W as a tracer for divertor erosion and transport. With a set of high spatial resolution PIXE measurements (∼3mm resolution), poloidal profiles of W migration have been constructed. Redeposition of up to 1.5×1021atoms/m2 (∼20nm equivalent thickness) is observed on the outer and inner divertor, and in the private-flux region. The campaign-integrated deposition on the analyzed tiles corresponds to net W erosion of ∼60nm (>0.014nm/s). 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External beam (in-air) particle induced X-ray emission (PIXE) analysis has been used to observe campaign-integrated W migration patterns in the otherwise Mo divertor using the W as a tracer for divertor erosion and transport. With a set of high spatial resolution PIXE measurements (∼3mm resolution), poloidal profiles of W migration have been constructed. Redeposition of up to 1.5×1021atoms/m2 (∼20nm equivalent thickness) is observed on the outer and inner divertor, and in the private-flux region. The campaign-integrated deposition on the analyzed tiles corresponds to net W erosion of ∼60nm (>0.014nm/s). The migration profiles indicate sputtering and prompt redeposition in the outer divertor, neutral and ion transport through the private–flux region, and transport in the scrape off layer.</description><subject>Applied sciences</subject><subject>Beams (radiation)</subject><subject>Controled nuclear fusion plants</subject><subject>Deposition</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Equivalence</subject><subject>Erosion</subject><subject>Exact sciences and technology</subject><subject>Fission nuclear power plants</subject><subject>Fuels</subject><subject>Installations for energy generation and conversion: thermal and electrical energy</subject><subject>Migration</subject><subject>Nuclear fuels</subject><subject>Tiles</subject><subject>Transport</subject><subject>Tungsten</subject><issn>0022-3115</issn><issn>1873-4820</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqNkE1LAzEQhoMoWKs_QchF8LI137uLBynFL6h40XNIk9maZT9qki3037ulxauehpl5Zl54ELqmZEYJVXf1rO4G25o0Y2Q_YzNO8xM0oUXOM1EwcoomhDCWcUrlObqIsSaEyJLICbqf45gGt8N9hdPQrWOCDrd-HUzyfYd9h9MX4HljTeoDXmRvvcPObyGM7SU6q0wT4epYp-jz6fFj8ZIt359fF_NlZgWRKVNKgjG0JEysnK1KWVYFByqLihABlKzsyjomBZTcrSwYZkqeV8aMK1Vwx_kU3R7-bkL_PUBMuvXRQtOYDvohaqpyKgVT9B-oUEIWShZyROUBtaGPMUClN8G3Juw0JXrvVdf66FXvvWrK9Oh1vLs5RphoTVMF01kff4-ZyAvFBRu5hwMHo5qth6Cj9dBZcD6ATdr1_o-kH7lAj5o</recordid><startdate>20110801</startdate><enddate>20110801</enddate><creator>Barnard, H.S.</creator><creator>Lipschultz, B.</creator><creator>Whyte, D.G.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7SR</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20110801</creationdate><title>A study of tungsten migration in the Alcator C-Mod divertor</title><author>Barnard, H.S. ; Lipschultz, B. ; Whyte, D.G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c405t-665eaa19024bdcf959f83e158f004e10bcbcd254e93dbcea2a937faae10683d33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Applied sciences</topic><topic>Beams (radiation)</topic><topic>Controled nuclear fusion plants</topic><topic>Deposition</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>Equivalence</topic><topic>Erosion</topic><topic>Exact sciences and technology</topic><topic>Fission nuclear power plants</topic><topic>Fuels</topic><topic>Installations for energy generation and conversion: thermal and electrical energy</topic><topic>Migration</topic><topic>Nuclear fuels</topic><topic>Tiles</topic><topic>Transport</topic><topic>Tungsten</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Barnard, H.S.</creatorcontrib><creatorcontrib>Lipschultz, B.</creatorcontrib><creatorcontrib>Whyte, D.G.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of nuclear materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Barnard, H.S.</au><au>Lipschultz, B.</au><au>Whyte, D.G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A study of tungsten migration in the Alcator C-Mod divertor</atitle><jtitle>Journal of nuclear materials</jtitle><date>2011-08-01</date><risdate>2011</risdate><volume>415</volume><issue>1</issue><spage>S301</spage><epage>S304</epage><pages>S301-S304</pages><issn>0022-3115</issn><eissn>1873-4820</eissn><coden>JNUMAM</coden><abstract>A toroidally-continuous row of bulk tungsten (W) tiles was installed near the typical location of the outer strike-point in the Alcator C-Mod divertor and was removed for analysis after two campaigns (3151 plasma discharges). 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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Beams (radiation) Controled nuclear fusion plants Deposition Energy Energy. Thermal use of fuels Equivalence Erosion Exact sciences and technology Fission nuclear power plants Fuels Installations for energy generation and conversion: thermal and electrical energy Migration Nuclear fuels Tiles Transport Tungsten |
| title | A study of tungsten migration in the Alcator C-Mod divertor |
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