Effects of edge dc biasing on plasma rotation and transport in a toroidal geometry
We report results from experiments performed to study how a change in boundary conditions affects the plasma state in the toroidal geometry of the Blaamann device in Tromso. The boundary condition was changed by applying a dc bias on a limiter extended around the entire poloidal circumference of the...
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Online Access: | http://hdl.handle.net/10281/441 https://doi.org/10.1088/0031-8949/2006/T122/004 |
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ftunivmilanobic:oai:boa.unimib.it:10281/441 2024-04-14T08:20:30+00:00 Effects of edge dc biasing on plasma rotation and transport in a toroidal geometry Fredriksen, A Magni, S. RICCARDI, CLAUDIA Fredriksen, A Riccardi, C Magni, S 2006 http://hdl.handle.net/10281/441 https://doi.org/10.1088/0031-8949/2006/T122/004 eng eng IOP PUBLISHING LTD place:STOCKHOLM info:eu-repo/semantics/altIdentifier/wos/WOS:000236918100004 volume:T122 firstpage:11 lastpage:14 journal:PHYSICA SCRIPTA http://hdl.handle.net/10281/441 doi:10.1088/0031-8949/2006/T122/004 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-42349107492 magnetoplasma anomalous transport electric field FIS/01 - FISICA SPERIMENTALE FIS/03 - FISICA DELLA MATERIA info:eu-repo/semantics/article 2006 ftunivmilanobic https://doi.org/10.1088/0031-8949/2006/T122/004 2024-03-21T16:23:11Z We report results from experiments performed to study how a change in boundary conditions affects the plasma state in the toroidal geometry of the Blaamann device in Tromso. The boundary condition was changed by applying a dc bias on a limiter extended around the entire poloidal circumference of the plasma column. Two distinctly different plasma potential states were found. One state was associated with a bias at or negative with respect to the floating potential of the limiter, and a small ion-saturation current. The other state was associated with a positive bias with respect to the floating potential, near or in the electron saturation regime of the limiter. In the latter case the potential minimum in the middle of the cross-section was significantly less negative than in the case of ion-saturation current to the limiter. On the other hand, the grounded limiter provided the best confinement properties, for which the density maximum was significantly higher than for both more positive and more negative biases. This state also had the lowest fluctuation levels, and near zero poloidal velocities close to the boundaries, as well as the smallest radial, anomalous particle transport. Article in Journal/Newspaper Tromso Tromso Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) Tromso ENVELOPE(16.546,16.546,68.801,68.801) Physica Scripta T122 11 14 |
institution |
Open Polar |
collection |
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive) |
op_collection_id |
ftunivmilanobic |
language |
English |
topic |
magnetoplasma anomalous transport electric field FIS/01 - FISICA SPERIMENTALE FIS/03 - FISICA DELLA MATERIA |
spellingShingle |
magnetoplasma anomalous transport electric field FIS/01 - FISICA SPERIMENTALE FIS/03 - FISICA DELLA MATERIA Fredriksen, A Magni, S. RICCARDI, CLAUDIA Effects of edge dc biasing on plasma rotation and transport in a toroidal geometry |
topic_facet |
magnetoplasma anomalous transport electric field FIS/01 - FISICA SPERIMENTALE FIS/03 - FISICA DELLA MATERIA |
description |
We report results from experiments performed to study how a change in boundary conditions affects the plasma state in the toroidal geometry of the Blaamann device in Tromso. The boundary condition was changed by applying a dc bias on a limiter extended around the entire poloidal circumference of the plasma column. Two distinctly different plasma potential states were found. One state was associated with a bias at or negative with respect to the floating potential of the limiter, and a small ion-saturation current. The other state was associated with a positive bias with respect to the floating potential, near or in the electron saturation regime of the limiter. In the latter case the potential minimum in the middle of the cross-section was significantly less negative than in the case of ion-saturation current to the limiter. On the other hand, the grounded limiter provided the best confinement properties, for which the density maximum was significantly higher than for both more positive and more negative biases. This state also had the lowest fluctuation levels, and near zero poloidal velocities close to the boundaries, as well as the smallest radial, anomalous particle transport. |
author2 |
Fredriksen, A Riccardi, C Magni, S |
format |
Article in Journal/Newspaper |
author |
Fredriksen, A Magni, S. RICCARDI, CLAUDIA |
author_facet |
Fredriksen, A Magni, S. RICCARDI, CLAUDIA |
author_sort |
Fredriksen, A |
title |
Effects of edge dc biasing on plasma rotation and transport in a toroidal geometry |
title_short |
Effects of edge dc biasing on plasma rotation and transport in a toroidal geometry |
title_full |
Effects of edge dc biasing on plasma rotation and transport in a toroidal geometry |
title_fullStr |
Effects of edge dc biasing on plasma rotation and transport in a toroidal geometry |
title_full_unstemmed |
Effects of edge dc biasing on plasma rotation and transport in a toroidal geometry |
title_sort |
effects of edge dc biasing on plasma rotation and transport in a toroidal geometry |
publisher |
IOP PUBLISHING LTD |
publishDate |
2006 |
url |
http://hdl.handle.net/10281/441 https://doi.org/10.1088/0031-8949/2006/T122/004 |
long_lat |
ENVELOPE(16.546,16.546,68.801,68.801) |
geographic |
Tromso |
geographic_facet |
Tromso |
genre |
Tromso Tromso |
genre_facet |
Tromso Tromso |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000236918100004 volume:T122 firstpage:11 lastpage:14 journal:PHYSICA SCRIPTA http://hdl.handle.net/10281/441 doi:10.1088/0031-8949/2006/T122/004 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-42349107492 |
op_doi |
https://doi.org/10.1088/0031-8949/2006/T122/004 |
container_title |
Physica Scripta |
container_volume |
T122 |
container_start_page |
11 |
op_container_end_page |
14 |
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1796298822841794560 |