L- to H-mode transitions at low density in ASDEX Upgrade
The results from ASDEX Upgrade discharges dedicated specifically to the investigation of low-density L-to-H transitions are presented. The plasmas were heated by electron cyclotron resonance heating to achieve a separation of electron and ion heat channels. Under such conditions, the ratio of electr...
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| Veröffentlicht in: | Nuclear fusion 2012-01, Vol.52 (1), p.012001-5 |
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| container_title | Nuclear fusion |
| container_volume | 52 |
| creator | Sauter, P Pütterich, T Ryter, F Viezzer, E Wolfrum, E Conway, G.D Fischer, R Kurzan, B McDermott, R.M Rathgeber, S.K |
| description | The results from ASDEX Upgrade discharges dedicated specifically to the investigation of low-density L-to-H transitions are presented. The plasmas were heated by electron cyclotron resonance heating to achieve a separation of electron and ion heat channels. Under such conditions, the ratio of electron to ion temperature at the plasma edge increases with decreasing density at the L–H transition and can be as high as 3.5. Our results strongly support the essential role of the ion channel in the L–H transition, via the diamagnetic
E
r
provided by the ion pressure gradient. |
| doi_str_mv | 10.1088/0029-5515/52/1/012001 |
| format | Article |
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E
r
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E
r
provided by the ion pressure gradient.</description><subject>Channels</subject><subject>Density</subject><subject>Electron cyclotron resonance</subject><subject>Heating</subject><subject>Ion channels</subject><subject>Nuclear fusion</subject><subject>Plasmas</subject><subject>Pressure gradients</subject><issn>0029-5515</issn><issn>1741-4326</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAQhoMouK7-BCFHD9ZO0qRJj8u6usKCB13wFtJ8SKXb1KaL7L-3pbIXxdPA8LzzDg9C1wTuCEiZAtAi4ZzwlNOUpEAoADlBMyIYSVhG81M0OzLn6CLGjwFgJMtmSG4S3Ae8TnbBOtx3uolVX4UmYt3jOnxh68bNAVcNXrzcr97wtn3vtHWX6MzrOrqrnzlH24fV63KdbJ4fn5aLTWKYEP1Qyb0uRSly8MC1seAto8PXUjJNmfGi9Jpzm-de-7KAzJRFXmbOGCh04XQ2RzfT3bYLn3sXe7WronF1rRsX9lERAYUQkhVyQPmEmi7E2Dmv2q7a6e6gCKjRlBotqNGC4lQRNZkacrdTrgrtMfInqlrrBxx-4_83fAP5YHXa</recordid><startdate>20120101</startdate><enddate>20120101</enddate><creator>Sauter, P</creator><creator>Pütterich, T</creator><creator>Ryter, F</creator><creator>Viezzer, E</creator><creator>Wolfrum, E</creator><creator>Conway, G.D</creator><creator>Fischer, R</creator><creator>Kurzan, B</creator><creator>McDermott, R.M</creator><creator>Rathgeber, S.K</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20120101</creationdate><title>L- to H-mode transitions at low density in ASDEX Upgrade</title><author>Sauter, P ; Pütterich, T ; Ryter, F ; Viezzer, E ; Wolfrum, E ; Conway, G.D ; Fischer, R ; Kurzan, B ; McDermott, R.M ; Rathgeber, S.K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c477t-555fab7b760f05acd0fd42088884a24cf7bfa55d66fafb903cb96b3ecc09a9ea3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Channels</topic><topic>Density</topic><topic>Electron cyclotron resonance</topic><topic>Heating</topic><topic>Ion channels</topic><topic>Nuclear fusion</topic><topic>Plasmas</topic><topic>Pressure gradients</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sauter, P</creatorcontrib><creatorcontrib>Pütterich, T</creatorcontrib><creatorcontrib>Ryter, F</creatorcontrib><creatorcontrib>Viezzer, E</creatorcontrib><creatorcontrib>Wolfrum, E</creatorcontrib><creatorcontrib>Conway, G.D</creatorcontrib><creatorcontrib>Fischer, R</creatorcontrib><creatorcontrib>Kurzan, B</creatorcontrib><creatorcontrib>McDermott, R.M</creatorcontrib><creatorcontrib>Rathgeber, S.K</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>Sauter, P</au><au>Pütterich, T</au><au>Ryter, F</au><au>Viezzer, E</au><au>Wolfrum, E</au><au>Conway, G.D</au><au>Fischer, R</au><au>Kurzan, B</au><au>McDermott, R.M</au><au>Rathgeber, S.K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>L- to H-mode transitions at low density in ASDEX Upgrade</atitle><jtitle>Nuclear fusion</jtitle><date>2012-01-01</date><risdate>2012</risdate><volume>52</volume><issue>1</issue><spage>012001</spage><epage>5</epage><pages>012001-5</pages><issn>0029-5515</issn><eissn>1741-4326</eissn><abstract>The results from ASDEX Upgrade discharges dedicated specifically to the investigation of low-density L-to-H transitions are presented. The plasmas were heated by electron cyclotron resonance heating to achieve a separation of electron and ion heat channels. Under such conditions, the ratio of electron to ion temperature at the plasma edge increases with decreasing density at the L–H transition and can be as high as 3.5. Our results strongly support the essential role of the ion channel in the L–H transition, via the diamagnetic
E
r
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Channels Density Electron cyclotron resonance Heating Ion channels Nuclear fusion Plasmas Pressure gradients |
| title | L- to H-mode transitions at low density in ASDEX Upgrade |
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