Observation of Impurity Accumulation After Hydrogen Multi-Pellet Injection in Large Helical Device
Impurity accumulation is studied for neutral beam-heated discharges after hydrogen multi-pellet injection in Large Helical Device （LHD）. Iron density profiles are derived from radial profiles of EUV line emissions of FeXV-XXIV with the help of the collisional-radiative model. A peaked density profil...
Gespeichert in:
| Veröffentlicht in: | Plasma science & technology 2013-03, Vol.15 (3), p.230-234, Article 230 |
|---|---|
| Hauptverfasser: | , , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 234 |
|---|---|
| container_issue | 3 |
| container_start_page | 230 |
| container_title | Plasma science & technology |
| container_volume | 15 |
| creator | Dong, Chunfeng Wang, Erhui Morita, Shigeru Goto, Motoshi Motojiama, Gen Murakami, Izumi Sakamoto, Ryuichi Yamamoto, Norimasa |
| description | Impurity accumulation is studied for neutral beam-heated discharges after hydrogen multi-pellet injection in Large Helical Device （LHD）. Iron density profiles are derived from radial profiles of EUV line emissions of FeXV-XXIV with the help of the collisional-radiative model. A peaked density profile of Fe2a＋ is simulated by using one-dimensional impurity transport code. The result indicates a large inward velocity of -6 m/s at the impurity accumulation phase. However, the discharge is not entirely affected by the impurity accumulation, since the concentration of iron impurity, estimated to be 3.3x10-5 to the electron density, is considerably small. On the other hand, a flat profile is observed for the carbon density of C6＋, which is derived from the Zeff profile, indicating a small inward velocity of -1 m/s. These results suggest atomic number dependence in the impurity accumulation of LHD, which is similar to the tokamak result. |
| doi_str_mv | 10.1088/1009-0630/15/3/08 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1685761207</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><cqvip_id>45196665</cqvip_id><sourcerecordid>1685761207</sourcerecordid><originalsourceid>FETCH-LOGICAL-c370t-c0bcd6774ffd3738267a489d0ac67064a18c9e6a97f40942dfa567ed88cf2f753</originalsourceid><addsrcrecordid>eNp9kD1PwzAQhjOARCn8ADazsYSc48R2xqp8tFJRGWC2XMcOrtyktZ1K_ff0Sx0YmE66e5-705MkDxieMXCeYYAqBUogw2VGMuBXyeDSu0luQ1gClEXFySBZzBdB-62MtmtRZ9B0te69jTs0Uqpf9e40GJmoPZrsat81ukUfvYs2_dTO6Yim7VKrY8q2aCZ9o9FEO6ukQy96a5W-S66NdEHfn-sw-X57_RpP0tn8fToezVJFGMRUwULVlLHCmJowwnPKZMGrGqSiDGghMVeVprJipoCqyGsjS8p0zbkyuWElGSZPp71r3216HaJY2aD2T8pWd30QmPKSUZwD20fxKap8F4LXRqy9XUm_ExjEwaE4-BIHXwKXggjge4b9YZSNRz3RS-v-JR_P5E_XNhvbNpdzRYkrSmlJfgG9joPG</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1685761207</pqid></control><display><type>article</type><title>Observation of Impurity Accumulation After Hydrogen Multi-Pellet Injection in Large Helical Device</title><source>IOP Publishing Journals</source><creator>Dong, Chunfeng ; Wang, Erhui ; Morita, Shigeru ; Goto, Motoshi ; Motojiama, Gen ; Murakami, Izumi ; Sakamoto, Ryuichi ; Yamamoto, Norimasa</creator><creatorcontrib>Dong, Chunfeng ; Wang, Erhui ; Morita, Shigeru ; Goto, Motoshi ; Motojiama, Gen ; Murakami, Izumi ; Sakamoto, Ryuichi ; Yamamoto, Norimasa</creatorcontrib><description>Impurity accumulation is studied for neutral beam-heated discharges after hydrogen multi-pellet injection in Large Helical Device （LHD）. Iron density profiles are derived from radial profiles of EUV line emissions of FeXV-XXIV with the help of the collisional-radiative model. A peaked density profile of Fe2a＋ is simulated by using one-dimensional impurity transport code. The result indicates a large inward velocity of -6 m/s at the impurity accumulation phase. However, the discharge is not entirely affected by the impurity accumulation, since the concentration of iron impurity, estimated to be 3.3x10-5 to the electron density, is considerably small. On the other hand, a flat profile is observed for the carbon density of C6＋, which is derived from the Zeff profile, indicating a small inward velocity of -1 m/s. These results suggest atomic number dependence in the impurity accumulation of LHD, which is similar to the tokamak result.</description><identifier>ISSN: 1009-0630</identifier><identifier>DOI: 10.1088/1009-0630/15/3/08</identifier><language>eng</language><subject>Carbon ; Density ; Devices ; Electron density ; Helical ; Impurities ; Iron ; Pellets ; Tokamak devices ; 中性束加热 ; 大型螺旋装置 ; 密度分布 ; 弹丸注入 ; 径向分布 ; 杂质积累 ; 氢 ; 碰撞辐射模型</subject><ispartof>Plasma science & technology, 2013-03, Vol.15 (3), p.230-234, Article 230</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c370t-c0bcd6774ffd3738267a489d0ac67064a18c9e6a97f40942dfa567ed88cf2f753</citedby><cites>FETCH-LOGICAL-c370t-c0bcd6774ffd3738267a489d0ac67064a18c9e6a97f40942dfa567ed88cf2f753</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/84262X/84262X.jpg</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Dong, Chunfeng</creatorcontrib><creatorcontrib>Wang, Erhui</creatorcontrib><creatorcontrib>Morita, Shigeru</creatorcontrib><creatorcontrib>Goto, Motoshi</creatorcontrib><creatorcontrib>Motojiama, Gen</creatorcontrib><creatorcontrib>Murakami, Izumi</creatorcontrib><creatorcontrib>Sakamoto, Ryuichi</creatorcontrib><creatorcontrib>Yamamoto, Norimasa</creatorcontrib><title>Observation of Impurity Accumulation After Hydrogen Multi-Pellet Injection in Large Helical Device</title><title>Plasma science & technology</title><addtitle>Plasma Science ＆ Technology</addtitle><description>Impurity accumulation is studied for neutral beam-heated discharges after hydrogen multi-pellet injection in Large Helical Device （LHD）. Iron density profiles are derived from radial profiles of EUV line emissions of FeXV-XXIV with the help of the collisional-radiative model. A peaked density profile of Fe2a＋ is simulated by using one-dimensional impurity transport code. The result indicates a large inward velocity of -6 m/s at the impurity accumulation phase. However, the discharge is not entirely affected by the impurity accumulation, since the concentration of iron impurity, estimated to be 3.3x10-5 to the electron density, is considerably small. On the other hand, a flat profile is observed for the carbon density of C6＋, which is derived from the Zeff profile, indicating a small inward velocity of -1 m/s. These results suggest atomic number dependence in the impurity accumulation of LHD, which is similar to the tokamak result.</description><subject>Carbon</subject><subject>Density</subject><subject>Devices</subject><subject>Electron density</subject><subject>Helical</subject><subject>Impurities</subject><subject>Iron</subject><subject>Pellets</subject><subject>Tokamak devices</subject><subject>中性束加热</subject><subject>大型螺旋装置</subject><subject>密度分布</subject><subject>弹丸注入</subject><subject>径向分布</subject><subject>杂质积累</subject><subject>氢</subject><subject>碰撞辐射模型</subject><issn>1009-0630</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNp9kD1PwzAQhjOARCn8ADazsYSc48R2xqp8tFJRGWC2XMcOrtyktZ1K_ff0Sx0YmE66e5-705MkDxieMXCeYYAqBUogw2VGMuBXyeDSu0luQ1gClEXFySBZzBdB-62MtmtRZ9B0te69jTs0Uqpf9e40GJmoPZrsat81ukUfvYs2_dTO6Yim7VKrY8q2aCZ9o9FEO6ukQy96a5W-S66NdEHfn-sw-X57_RpP0tn8fToezVJFGMRUwULVlLHCmJowwnPKZMGrGqSiDGghMVeVprJipoCqyGsjS8p0zbkyuWElGSZPp71r3216HaJY2aD2T8pWd30QmPKSUZwD20fxKap8F4LXRqy9XUm_ExjEwaE4-BIHXwKXggjge4b9YZSNRz3RS-v-JR_P5E_XNhvbNpdzRYkrSmlJfgG9joPG</recordid><startdate>20130301</startdate><enddate>20130301</enddate><creator>Dong, Chunfeng</creator><creator>Wang, Erhui</creator><creator>Morita, Shigeru</creator><creator>Goto, Motoshi</creator><creator>Motojiama, Gen</creator><creator>Murakami, Izumi</creator><creator>Sakamoto, Ryuichi</creator><creator>Yamamoto, Norimasa</creator><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>7U5</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20130301</creationdate><title>Observation of Impurity Accumulation After Hydrogen Multi-Pellet Injection in Large Helical Device</title><author>Dong, Chunfeng ; Wang, Erhui ; Morita, Shigeru ; Goto, Motoshi ; Motojiama, Gen ; Murakami, Izumi ; Sakamoto, Ryuichi ; Yamamoto, Norimasa</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-c0bcd6774ffd3738267a489d0ac67064a18c9e6a97f40942dfa567ed88cf2f753</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Carbon</topic><topic>Density</topic><topic>Devices</topic><topic>Electron density</topic><topic>Helical</topic><topic>Impurities</topic><topic>Iron</topic><topic>Pellets</topic><topic>Tokamak devices</topic><topic>中性束加热</topic><topic>大型螺旋装置</topic><topic>密度分布</topic><topic>弹丸注入</topic><topic>径向分布</topic><topic>杂质积累</topic><topic>氢</topic><topic>碰撞辐射模型</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dong, Chunfeng</creatorcontrib><creatorcontrib>Wang, Erhui</creatorcontrib><creatorcontrib>Morita, Shigeru</creatorcontrib><creatorcontrib>Goto, Motoshi</creatorcontrib><creatorcontrib>Motojiama, Gen</creatorcontrib><creatorcontrib>Murakami, Izumi</creatorcontrib><creatorcontrib>Sakamoto, Ryuichi</creatorcontrib><creatorcontrib>Yamamoto, Norimasa</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Plasma science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dong, Chunfeng</au><au>Wang, Erhui</au><au>Morita, Shigeru</au><au>Goto, Motoshi</au><au>Motojiama, Gen</au><au>Murakami, Izumi</au><au>Sakamoto, Ryuichi</au><au>Yamamoto, Norimasa</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observation of Impurity Accumulation After Hydrogen Multi-Pellet Injection in Large Helical Device</atitle><jtitle>Plasma science & technology</jtitle><addtitle>Plasma Science ＆ Technology</addtitle><date>2013-03-01</date><risdate>2013</risdate><volume>15</volume><issue>3</issue><spage>230</spage><epage>234</epage><pages>230-234</pages><artnum>230</artnum><issn>1009-0630</issn><abstract>Impurity accumulation is studied for neutral beam-heated discharges after hydrogen multi-pellet injection in Large Helical Device （LHD）. Iron density profiles are derived from radial profiles of EUV line emissions of FeXV-XXIV with the help of the collisional-radiative model. A peaked density profile of Fe2a＋ is simulated by using one-dimensional impurity transport code. The result indicates a large inward velocity of -6 m/s at the impurity accumulation phase. However, the discharge is not entirely affected by the impurity accumulation, since the concentration of iron impurity, estimated to be 3.3x10-5 to the electron density, is considerably small. On the other hand, a flat profile is observed for the carbon density of C6＋, which is derived from the Zeff profile, indicating a small inward velocity of -1 m/s. These results suggest atomic number dependence in the impurity accumulation of LHD, which is similar to the tokamak result.</abstract><doi>10.1088/1009-0630/15/3/08</doi><tpages>5</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1009-0630 |
| ispartof | Plasma science & technology, 2013-03, Vol.15 (3), p.230-234, Article 230 |
| issn | 1009-0630 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1685761207 |
| source | IOP Publishing Journals |
| subjects | Carbon Density Devices Electron density Helical Impurities Iron Pellets Tokamak devices 中性束加热 大型螺旋装置 密度分布 弹丸注入 径向分布 杂质积累 氢 碰撞辐射模型 |
| title | Observation of Impurity Accumulation After Hydrogen Multi-Pellet Injection in Large Helical Device |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-31T14%3A38%3A33IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Observation%20of%20Impurity%20Accumulation%20After%20Hydrogen%20Multi-Pellet%20Injection%20in%20Large%20Helical%20Device&rft.jtitle=Plasma%20science%20&%20technology&rft.au=Dong,%20Chunfeng&rft.date=2013-03-01&rft.volume=15&rft.issue=3&rft.spage=230&rft.epage=234&rft.pages=230-234&rft.artnum=230&rft.issn=1009-0630&rft_id=info:doi/10.1088/1009-0630/15/3/08&rft_dat=%3Cproquest_cross%3E1685761207%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1685761207&rft_id=info:pmid/&rft_cqvip_id=45196665&rfr_iscdi=true |