A new experimental classification of divertor detachment in ASDEX Upgrade
In this paper, a new experimental classification of divertor detachment in ASDEX Upgrade is presented. For this purpose, a series of ohmic and L-mode density ramp discharges at different heating powers, magnetic field directions and plasma species were carried out. For the first time at ASDEX Upgrad...
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| Veröffentlicht in: | Nuclear fusion 2014-01, Vol.54 (1), p.13001-19 |
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| container_title | Nuclear fusion |
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| creator | Potzel, S. Wischmeier, M. Bernert, M. Dux, R. Müller, H.W. Scarabosio, A. |
| description | In this paper, a new experimental classification of divertor detachment in ASDEX Upgrade is presented. For this purpose, a series of ohmic and L-mode density ramp discharges at different heating powers, magnetic field directions and plasma species were carried out. For the first time at ASDEX Upgrade the electron density in the divertor volume and the occurrence of volume recombination were measured by means of spectroscopy. It is shown that detachment is not a continuously evolving process but rather undergoes three distinct states while the characteristics of the inner and outer divertor are strongly coupled. Before the complete detachment of the inner and outer divertor, radiative fluctuations occur in the inner divertor close to the X-point, observed for the first time via new fast diode bolometers. Finally, the effect of an externally applied magnetic perturbation field on the detachment process is investigated. |
| doi_str_mv | 10.1088/0029-5515/54/1/013001 |
| format | Article |
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Finally, the effect of an externally applied magnetic perturbation field on the detachment process is investigated.</description><subject>Classification</subject><subject>Density</subject><subject>Detachment</subject><subject>Diodes</subject><subject>Electron density</subject><subject>Magnetic fields</subject><subject>Nuclear fusion</subject><subject>Ramps</subject><issn>0029-5515</issn><issn>1741-4326</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqFkMtKAzEUQIMoWKufIGQlbsbJzWMey1KrFgoutOAupElGU6aTMZn6-HtnGBEXgqu7uOdcuAehcyBXQIoiJYSWiRAgUsFTSAkwQuAATSDnkHBGs0M0-WGO0UmM2x7gwNgELWe4se_YfrQ2uJ1tOlVjXasYXeW06pxvsK-wcW82dD5gYzulXwYOuwbPHq4XT3jdPgdl7Ck6qlQd7dn3nKL1zeJxfpes7m-X89kq0TynXcJyIMxYk5fKZqQsCkoyajjwogLKjciN4ZQrrjc2h7IgmQFRin7BNTUbKNkUXY532-Bf9zZ2cueitnWtGuv3UUIORZlxyqBHxYjq4GMMtpJt_6QKnxKIHNLJIYscskjBJcgxXe_B6Dnfyq3fh6Z_6F_n4g-nqX5DsjUV-wIk2Hrn</recordid><startdate>20140101</startdate><enddate>20140101</enddate><creator>Potzel, S.</creator><creator>Wischmeier, M.</creator><creator>Bernert, M.</creator><creator>Dux, R.</creator><creator>Müller, H.W.</creator><creator>Scarabosio, A.</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>20140101</creationdate><title>A new experimental classification of divertor detachment in ASDEX Upgrade</title><author>Potzel, S. ; Wischmeier, M. ; Bernert, M. ; Dux, R. ; Müller, H.W. ; Scarabosio, A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c472t-37103ded79ae609882062d4148f124d57dd424a4cbe719806d15954d54c2db193</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Classification</topic><topic>Density</topic><topic>Detachment</topic><topic>Diodes</topic><topic>Electron density</topic><topic>Magnetic fields</topic><topic>Nuclear fusion</topic><topic>Ramps</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Potzel, S.</creatorcontrib><creatorcontrib>Wischmeier, M.</creatorcontrib><creatorcontrib>Bernert, M.</creatorcontrib><creatorcontrib>Dux, R.</creatorcontrib><creatorcontrib>Müller, H.W.</creatorcontrib><creatorcontrib>Scarabosio, A.</creatorcontrib><creatorcontrib>the ASDEX Upgrade Team</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>Potzel, S.</au><au>Wischmeier, M.</au><au>Bernert, M.</au><au>Dux, R.</au><au>Müller, H.W.</au><au>Scarabosio, A.</au><aucorp>the ASDEX Upgrade Team</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A new experimental classification of divertor detachment in ASDEX Upgrade</atitle><jtitle>Nuclear fusion</jtitle><stitle>NF</stitle><addtitle>Nucl. Fusion</addtitle><date>2014-01-01</date><risdate>2014</risdate><volume>54</volume><issue>1</issue><spage>13001</spage><epage>19</epage><pages>13001-19</pages><issn>0029-5515</issn><eissn>1741-4326</eissn><coden>NUFUAU</coden><abstract>In this paper, a new experimental classification of divertor detachment in ASDEX Upgrade is presented. For this purpose, a series of ohmic and L-mode density ramp discharges at different heating powers, magnetic field directions and plasma species were carried out. For the first time at ASDEX Upgrade the electron density in the divertor volume and the occurrence of volume recombination were measured by means of spectroscopy. It is shown that detachment is not a continuously evolving process but rather undergoes three distinct states while the characteristics of the inner and outer divertor are strongly coupled. 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| language | eng |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Classification Density Detachment Diodes Electron density Magnetic fields Nuclear fusion Ramps |
| title | A new experimental classification of divertor detachment in ASDEX Upgrade |
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