High-speed 2-D image measurement for plasma-wall interaction studies
A movable carbon target with a head diameter of 9cm was inserted into the peripheral region of a Heliotron J plasma. High-speed, two-dimensional images of filtered visible light emission near this target were taken by a C-MOS video camera. In high-density ECH discharges (70GHz, 0.3MW, n¯e>1.5×101...
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| Veröffentlicht in: | Journal of nuclear materials 2005-03, Vol.337-339, p.1073-1076 |
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| container_title | Journal of nuclear materials |
| container_volume | 337-339 |
| creator | Nishino, N. Takahashi, K. Kawazome, H. Fukagawa, Y. Mizuuchi, T. Kondo, K. Sano, F. Nagasaki, K. Okada, H. Kobayahi, S. Yamamoto, S. |
| description | A movable carbon target with a head diameter of 9cm was inserted into the peripheral region of a Heliotron J plasma. High-speed, two-dimensional images of filtered visible light emission near this target were taken by a C-MOS video camera. In high-density ECH discharges (70GHz, 0.3MW, n¯e>1.5×1019 m−3) it was observed that a striped pattern of Hα light moved along the poloidal direction. Simultaneously, other diagnostic data (ECE signals, line integral electron density, ion saturation currents of Langmuir probes) showed plasma oscillation at a frequency of 5–6kHz. Individual signals from pixels of the visible camera images indicate that the oscillation phase is approximately constant along the field line, suggesting that coherent structure phenomena along the field line are present in the high-density plasmas of Heliotron J. |
| doi_str_mv | 10.1016/j.jnucmat.2004.10.026 |
| format | Article |
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High-speed, two-dimensional images of filtered visible light emission near this target were taken by a C-MOS video camera. In high-density ECH discharges (70GHz, 0.3MW, n¯e>1.5×1019 m−3) it was observed that a striped pattern of Hα light moved along the poloidal direction. Simultaneously, other diagnostic data (ECE signals, line integral electron density, ion saturation currents of Langmuir probes) showed plasma oscillation at a frequency of 5–6kHz. Individual signals from pixels of the visible camera images indicate that the oscillation phase is approximately constant along the field line, suggesting that coherent structure phenomena along the field line are present in the high-density plasmas of Heliotron J.</description><identifier>ISSN: 0022-3115</identifier><identifier>EISSN: 1873-4820</identifier><identifier>DOI: 10.1016/j.jnucmat.2004.10.026</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Carbon-based materials ; Limiter ; Probes ; Spectroscopy ; Visible imaging</subject><ispartof>Journal of nuclear materials, 2005-03, Vol.337-339, p.1073-1076</ispartof><rights>2004 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c406t-bf1e207349c07b3fef64c0a21c26dd5e1a8b5accb4fdbe0479ef044401a15bcf3</citedby><cites>FETCH-LOGICAL-c406t-bf1e207349c07b3fef64c0a21c26dd5e1a8b5accb4fdbe0479ef044401a15bcf3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jnucmat.2004.10.026$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27922,27923,45993</link.rule.ids></links><search><creatorcontrib>Nishino, N.</creatorcontrib><creatorcontrib>Takahashi, K.</creatorcontrib><creatorcontrib>Kawazome, H.</creatorcontrib><creatorcontrib>Fukagawa, Y.</creatorcontrib><creatorcontrib>Mizuuchi, T.</creatorcontrib><creatorcontrib>Kondo, K.</creatorcontrib><creatorcontrib>Sano, F.</creatorcontrib><creatorcontrib>Nagasaki, K.</creatorcontrib><creatorcontrib>Okada, H.</creatorcontrib><creatorcontrib>Kobayahi, S.</creatorcontrib><creatorcontrib>Yamamoto, S.</creatorcontrib><title>High-speed 2-D image measurement for plasma-wall interaction studies</title><title>Journal of nuclear materials</title><description>A movable carbon target with a head diameter of 9cm was inserted into the peripheral region of a Heliotron J plasma. High-speed, two-dimensional images of filtered visible light emission near this target were taken by a C-MOS video camera. In high-density ECH discharges (70GHz, 0.3MW, n¯e>1.5×1019 m−3) it was observed that a striped pattern of Hα light moved along the poloidal direction. Simultaneously, other diagnostic data (ECE signals, line integral electron density, ion saturation currents of Langmuir probes) showed plasma oscillation at a frequency of 5–6kHz. Individual signals from pixels of the visible camera images indicate that the oscillation phase is approximately constant along the field line, suggesting that coherent structure phenomena along the field line are present in the high-density plasmas of Heliotron J.</description><subject>Carbon-based materials</subject><subject>Limiter</subject><subject>Probes</subject><subject>Spectroscopy</subject><subject>Visible imaging</subject><issn>0022-3115</issn><issn>1873-4820</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LxDAYhIMouK7-BKEnb6lv0qTtnkR21RUWvOg5pOmbNaVfJqniv7fL7t3TwDAzMA8htwxSBiy_b9Kmn0ynY8oBxOylwPMzsmBlkVFRcjgnCwDOacaYvCRXITQAIFcgF2SzdftPGkbEOuF0k7hO7zHpUIfJY4d9TOzgk7HVodP0R7dt4vqIXpvohj4JcaodhmtyYXUb8OakS_Lx_PS-3tLd28vr-nFHjYA80soy5FBkYmWgqDKLNhcGNGeG53UtkemyktqYSti6QhDFCi0IIYBpJitjsyW5O-6OfviaMETVuWCwbXWPwxQUL6UUMpNzUB6Dxg8heLRq9PMz_6sYqAMz1agTM3VgdrBnZnPv4djD-cW3Q6-CcdgbrJ1HE1U9uH8W_gAIoXin</recordid><startdate>20050301</startdate><enddate>20050301</enddate><creator>Nishino, N.</creator><creator>Takahashi, K.</creator><creator>Kawazome, H.</creator><creator>Fukagawa, Y.</creator><creator>Mizuuchi, T.</creator><creator>Kondo, K.</creator><creator>Sano, F.</creator><creator>Nagasaki, K.</creator><creator>Okada, H.</creator><creator>Kobayahi, S.</creator><creator>Yamamoto, S.</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20050301</creationdate><title>High-speed 2-D image measurement for plasma-wall interaction studies</title><author>Nishino, N. ; Takahashi, K. ; Kawazome, H. ; Fukagawa, Y. ; Mizuuchi, T. ; Kondo, K. ; Sano, F. ; Nagasaki, K. ; Okada, H. ; Kobayahi, S. ; Yamamoto, S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c406t-bf1e207349c07b3fef64c0a21c26dd5e1a8b5accb4fdbe0479ef044401a15bcf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Carbon-based materials</topic><topic>Limiter</topic><topic>Probes</topic><topic>Spectroscopy</topic><topic>Visible imaging</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nishino, N.</creatorcontrib><creatorcontrib>Takahashi, K.</creatorcontrib><creatorcontrib>Kawazome, H.</creatorcontrib><creatorcontrib>Fukagawa, Y.</creatorcontrib><creatorcontrib>Mizuuchi, T.</creatorcontrib><creatorcontrib>Kondo, K.</creatorcontrib><creatorcontrib>Sano, F.</creatorcontrib><creatorcontrib>Nagasaki, K.</creatorcontrib><creatorcontrib>Okada, H.</creatorcontrib><creatorcontrib>Kobayahi, S.</creatorcontrib><creatorcontrib>Yamamoto, S.</creatorcontrib><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology 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>Nishino, N.</au><au>Takahashi, K.</au><au>Kawazome, H.</au><au>Fukagawa, Y.</au><au>Mizuuchi, T.</au><au>Kondo, K.</au><au>Sano, F.</au><au>Nagasaki, K.</au><au>Okada, H.</au><au>Kobayahi, S.</au><au>Yamamoto, S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High-speed 2-D image measurement for plasma-wall interaction studies</atitle><jtitle>Journal of nuclear materials</jtitle><date>2005-03-01</date><risdate>2005</risdate><volume>337-339</volume><spage>1073</spage><epage>1076</epage><pages>1073-1076</pages><issn>0022-3115</issn><eissn>1873-4820</eissn><abstract>A movable carbon target with a head diameter of 9cm was inserted into the peripheral region of a Heliotron J plasma. High-speed, two-dimensional images of filtered visible light emission near this target were taken by a C-MOS video camera. In high-density ECH discharges (70GHz, 0.3MW, n¯e>1.5×1019 m−3) it was observed that a striped pattern of Hα light moved along the poloidal direction. Simultaneously, other diagnostic data (ECE signals, line integral electron density, ion saturation currents of Langmuir probes) showed plasma oscillation at a frequency of 5–6kHz. Individual signals from pixels of the visible camera images indicate that the oscillation phase is approximately constant along the field line, suggesting that coherent structure phenomena along the field line are present in the high-density plasmas of Heliotron J.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.jnucmat.2004.10.026</doi><tpages>4</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Carbon-based materials Limiter Probes Spectroscopy Visible imaging |
| title | High-speed 2-D image measurement for plasma-wall interaction studies |
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