Studies of DC biasing of internal ring on plasma rotation and transport in a toroidal geometry
We report results from experiments performed to study how a DC bias with respect to the plasma potential is affecting the plasma states in the toroidal geometry of the Blaamann device in Tromso. In the experiments discussed here, a ring with smaller diameter than the limiter was centered inside the...
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ftdatacite:10.48550/arxiv.physics/0411193 2023-05-15T18:33:53+02:00 Studies of DC biasing of internal ring on plasma rotation and transport in a toroidal geometry Fredriksen, Ashild Riccardi, Claudia Magni, Simone 2004 https://dx.doi.org/10.48550/arxiv.physics/0411193 https://arxiv.org/abs/physics/0411193 unknown arXiv Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ Plasma Physics physics.plasm-ph FOS Physical sciences Preprint Article article CreativeWork 2004 ftdatacite https://doi.org/10.48550/arxiv.physics/0411193 2022-04-01T16:17:44Z We report results from experiments performed to study how a DC bias with respect to the plasma potential is affecting the plasma states in the toroidal geometry of the Blaamann device in Tromso. In the experiments discussed here, a ring with smaller diameter than the limiter was centered inside the bulk of the plasma and its bias varied with respect to the plasma potential. In the electron saturation current regime of the ring, a significant reduction of the fluctuation levels was observed, and a shear in the poloidal velocity occurred at the low-field side of the ring. This shear was positioned at the same radial position as the maximum of the radial transport when the ring was left floating or biased in the ion saturation current regime. For the latter ring biases, the poloidal velocities had no shear on the low-field side of the ring. Without the velocity shear, the radial transport was similar to previous experiments without ring. With the velocity shear, the radial transport was destroyed. This plasma state, with very low radial transport and fluctuation levels as well as plasma densities around 1017 m-3, is believed to provide a suitable plasma for wave propagation studies in a magnetized plasma with curved magnetic field lines without end effects. : 12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France) Report Tromso Tromso DataCite Metadata Store (German National Library of Science and Technology) Tromso ENVELOPE(16.546,16.546,68.801,68.801) |
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collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
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unknown |
topic |
Plasma Physics physics.plasm-ph FOS Physical sciences |
spellingShingle |
Plasma Physics physics.plasm-ph FOS Physical sciences Fredriksen, Ashild Riccardi, Claudia Magni, Simone Studies of DC biasing of internal ring on plasma rotation and transport in a toroidal geometry |
topic_facet |
Plasma Physics physics.plasm-ph FOS Physical sciences |
description |
We report results from experiments performed to study how a DC bias with respect to the plasma potential is affecting the plasma states in the toroidal geometry of the Blaamann device in Tromso. In the experiments discussed here, a ring with smaller diameter than the limiter was centered inside the bulk of the plasma and its bias varied with respect to the plasma potential. In the electron saturation current regime of the ring, a significant reduction of the fluctuation levels was observed, and a shear in the poloidal velocity occurred at the low-field side of the ring. This shear was positioned at the same radial position as the maximum of the radial transport when the ring was left floating or biased in the ion saturation current regime. For the latter ring biases, the poloidal velocities had no shear on the low-field side of the ring. Without the velocity shear, the radial transport was similar to previous experiments without ring. With the velocity shear, the radial transport was destroyed. This plasma state, with very low radial transport and fluctuation levels as well as plasma densities around 1017 m-3, is believed to provide a suitable plasma for wave propagation studies in a magnetized plasma with curved magnetic field lines without end effects. : 12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France) |
format |
Report |
author |
Fredriksen, Ashild Riccardi, Claudia Magni, Simone |
author_facet |
Fredriksen, Ashild Riccardi, Claudia Magni, Simone |
author_sort |
Fredriksen, Ashild |
title |
Studies of DC biasing of internal ring on plasma rotation and transport in a toroidal geometry |
title_short |
Studies of DC biasing of internal ring on plasma rotation and transport in a toroidal geometry |
title_full |
Studies of DC biasing of internal ring on plasma rotation and transport in a toroidal geometry |
title_fullStr |
Studies of DC biasing of internal ring on plasma rotation and transport in a toroidal geometry |
title_full_unstemmed |
Studies of DC biasing of internal ring on plasma rotation and transport in a toroidal geometry |
title_sort |
studies of dc biasing of internal ring on plasma rotation and transport in a toroidal geometry |
publisher |
arXiv |
publishDate |
2004 |
url |
https://dx.doi.org/10.48550/arxiv.physics/0411193 https://arxiv.org/abs/physics/0411193 |
long_lat |
ENVELOPE(16.546,16.546,68.801,68.801) |
geographic |
Tromso |
geographic_facet |
Tromso |
genre |
Tromso Tromso |
genre_facet |
Tromso Tromso |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.physics/0411193 |
_version_ |
1766218514830458880 |