Noninductive plasma initiation and startup in the DIII-D tokamak
Noninductive plasma startup with second harmonic electron cyclotron heating has been studied in DIII-D. Plasma currents up to 33 kA have been obtained in this phase. The maximum current obtained was primarily limited by the experimental time and does not necessarily represent the highest achievable...
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Veröffentlicht in: | Nuclear fusion 2011-08, Vol.51 (8), p.83015-9 |
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creator | Jackson, G.L. Humphreys, D.A. Hyatt, A.W. Lohr, J.M. Luce, T.C. Yu, J.H. |
description | Noninductive plasma startup with second harmonic electron cyclotron heating has been studied in DIII-D. Plasma currents up to 33 kA have been obtained in this phase. The maximum current obtained was primarily limited by the experimental time and does not necessarily represent the highest achievable current. The dominant physical mechanism for the observed current is the Pfirsch–Schlüter current on open field lines. Closed flux surfaces have been observed, but in a rather limited region, compared with previous experiments in spherical tokamaks. This method of plasma initiation and initial current ramp might be used in future burning plasma devices in conjunction with other current drive techniques to provide a fully noninductive startup. |
doi_str_mv | 10.1088/0029-5515/51/8/083015 |
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Plasma currents up to 33 kA have been obtained in this phase. The maximum current obtained was primarily limited by the experimental time and does not necessarily represent the highest achievable current. The dominant physical mechanism for the observed current is the Pfirsch–Schlüter current on open field lines. Closed flux surfaces have been observed, but in a rather limited region, compared with previous experiments in spherical tokamaks. This method of plasma initiation and initial current ramp might be used in future burning plasma devices in conjunction with other current drive techniques to provide a fully noninductive startup.</description><identifier>ISSN: 0029-5515</identifier><identifier>EISSN: 1741-4326</identifier><identifier>DOI: 10.1088/0029-5515/51/8/083015</identifier><language>eng</language><subject>Combustion ; Devices ; Electron cyclotron heating ; Flux ; Nuclear fusion ; Plasma currents ; Ramps ; Tokamak devices</subject><ispartof>Nuclear fusion, 2011-08, Vol.51 (8), p.83015-9</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c352t-4bbc56218f9918b16cc41d8d1e32b77233dbe66f4bf39f5a6f9b63ae727fc8a53</citedby><cites>FETCH-LOGICAL-c352t-4bbc56218f9918b16cc41d8d1e32b77233dbe66f4bf39f5a6f9b63ae727fc8a53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27915,27916</link.rule.ids></links><search><creatorcontrib>Jackson, G.L.</creatorcontrib><creatorcontrib>Humphreys, D.A.</creatorcontrib><creatorcontrib>Hyatt, A.W.</creatorcontrib><creatorcontrib>Lohr, J.M.</creatorcontrib><creatorcontrib>Luce, T.C.</creatorcontrib><creatorcontrib>Yu, J.H.</creatorcontrib><title>Noninductive plasma initiation and startup in the DIII-D tokamak</title><title>Nuclear fusion</title><description>Noninductive plasma startup with second harmonic electron cyclotron heating has been studied in DIII-D. Plasma currents up to 33 kA have been obtained in this phase. The maximum current obtained was primarily limited by the experimental time and does not necessarily represent the highest achievable current. The dominant physical mechanism for the observed current is the Pfirsch–Schlüter current on open field lines. Closed flux surfaces have been observed, but in a rather limited region, compared with previous experiments in spherical tokamaks. This method of plasma initiation and initial current ramp might be used in future burning plasma devices in conjunction with other current drive techniques to provide a fully noninductive startup.</description><subject>Combustion</subject><subject>Devices</subject><subject>Electron cyclotron heating</subject><subject>Flux</subject><subject>Nuclear fusion</subject><subject>Plasma currents</subject><subject>Ramps</subject><subject>Tokamak devices</subject><issn>0029-5515</issn><issn>1741-4326</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNo9kM1KxDAYRYMoOI4-gpClmzr5kiZNdsqMo4VBN7oOaZpgnP7ZpIJvb8cRV5d7OdzFQegayC0QKVeEUJVxDnzFYTVXyQjwE7SAIocsZ1ScosU_c44uYvwgBHJgbIHunvsudPVkU_hyeGhMbA0OXUjBpNB32HQ1jsmMaRrmGad3hzdlWWYbnPq9ac3-Ep1500R39ZdL9LZ9eF0_ZbuXx3J9v8ss4zRleVVZLihIrxTICoS1OdSyBsdoVRSUsbpyQvi88kx5boRXlWDGFbTwVhrOlujm-DuM_efkYtJtiNY1jelcP0UNBUglckHUjPIjasc-xtF5PYyhNeO3BqIPxvTBhj7Y0Bz0XH-NsR8ZZF3x</recordid><startdate>20110801</startdate><enddate>20110801</enddate><creator>Jackson, G.L.</creator><creator>Humphreys, D.A.</creator><creator>Hyatt, A.W.</creator><creator>Lohr, J.M.</creator><creator>Luce, T.C.</creator><creator>Yu, J.H.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20110801</creationdate><title>Noninductive plasma initiation and startup in the DIII-D tokamak</title><author>Jackson, G.L. ; Humphreys, D.A. ; Hyatt, A.W. ; Lohr, J.M. ; Luce, T.C. ; Yu, J.H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c352t-4bbc56218f9918b16cc41d8d1e32b77233dbe66f4bf39f5a6f9b63ae727fc8a53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Combustion</topic><topic>Devices</topic><topic>Electron cyclotron heating</topic><topic>Flux</topic><topic>Nuclear fusion</topic><topic>Plasma currents</topic><topic>Ramps</topic><topic>Tokamak devices</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jackson, G.L.</creatorcontrib><creatorcontrib>Humphreys, D.A.</creatorcontrib><creatorcontrib>Hyatt, A.W.</creatorcontrib><creatorcontrib>Lohr, J.M.</creatorcontrib><creatorcontrib>Luce, T.C.</creatorcontrib><creatorcontrib>Yu, J.H.</creatorcontrib><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Nuclear fusion</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jackson, G.L.</au><au>Humphreys, D.A.</au><au>Hyatt, A.W.</au><au>Lohr, J.M.</au><au>Luce, T.C.</au><au>Yu, J.H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Noninductive plasma initiation and startup in the DIII-D tokamak</atitle><jtitle>Nuclear fusion</jtitle><date>2011-08-01</date><risdate>2011</risdate><volume>51</volume><issue>8</issue><spage>83015</spage><epage>9</epage><pages>83015-9</pages><issn>0029-5515</issn><eissn>1741-4326</eissn><abstract>Noninductive plasma startup with second harmonic electron cyclotron heating has been studied in DIII-D. Plasma currents up to 33 kA have been obtained in this phase. The maximum current obtained was primarily limited by the experimental time and does not necessarily represent the highest achievable current. The dominant physical mechanism for the observed current is the Pfirsch–Schlüter current on open field lines. Closed flux surfaces have been observed, but in a rather limited region, compared with previous experiments in spherical tokamaks. This method of plasma initiation and initial current ramp might be used in future burning plasma devices in conjunction with other current drive techniques to provide a fully noninductive startup.</abstract><doi>10.1088/0029-5515/51/8/083015</doi><tpages>9</tpages></addata></record> |
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subjects | Combustion Devices Electron cyclotron heating Flux Nuclear fusion Plasma currents Ramps Tokamak devices |
title | Noninductive plasma initiation and startup in the DIII-D tokamak |
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