Effects of internal DC biased ring on plasma rotation and transport in a toroidal geometry
12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France) 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 discu...
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ftunivnantes:oai:HAL:hal-00001738v2 2023-05-15T18:33:53+02:00 Effects of internal DC biased ring on plasma rotation and transport in a toroidal geometry Fredriksen, Ashild Riccardi, Claudia Magni, Simone Dep. Physics University of Tromsø (UiT) Dipartimento di Fisica "Giuseppe Occhialini" = Department of Physics "Giuseppe Occhialini" Milano-Bicocca Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB) 2004-11-21 https://hal.archives-ouvertes.fr/hal-00001738 https://hal.archives-ouvertes.fr/hal-00001738v2/document https://hal.archives-ouvertes.fr/hal-00001738v2/file/ICPP2004InternalBias1511.pdf en eng HAL CCSD info:eu-repo/semantics/altIdentifier/arxiv/physics/0411193 hal-00001738 https://hal.archives-ouvertes.fr/hal-00001738 https://hal.archives-ouvertes.fr/hal-00001738v2/document https://hal.archives-ouvertes.fr/hal-00001738v2/file/ICPP2004InternalBias1511.pdf ARXIV: physics/0411193 info:eu-repo/semantics/OpenAccess https://hal.archives-ouvertes.fr/hal-00001738 {date} plasma rotation DC biasing velocity shear quiescent plasma [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] info:eu-repo/semantics/preprint Preprints, Working Papers, . 2004 ftunivnantes 2022-11-30T01:08:21Z 12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France) 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. Report Tromso Tromso Université de Nantes: HAL-UNIV-NANTES Tromso ENVELOPE(16.546,16.546,68.801,68.801) |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
plasma rotation DC biasing velocity shear quiescent plasma [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] |
spellingShingle |
plasma rotation DC biasing velocity shear quiescent plasma [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] Fredriksen, Ashild Riccardi, Claudia Magni, Simone Effects of internal DC biased ring on plasma rotation and transport in a toroidal geometry |
topic_facet |
plasma rotation DC biasing velocity shear quiescent plasma [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] |
description |
12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France) 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. |
author2 |
Dep. Physics University of Tromsø (UiT) Dipartimento di Fisica "Giuseppe Occhialini" = Department of Physics "Giuseppe Occhialini" Milano-Bicocca Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB) |
format |
Report |
author |
Fredriksen, Ashild Riccardi, Claudia Magni, Simone |
author_facet |
Fredriksen, Ashild Riccardi, Claudia Magni, Simone |
author_sort |
Fredriksen, Ashild |
title |
Effects of internal DC biased ring on plasma rotation and transport in a toroidal geometry |
title_short |
Effects of internal DC biased ring on plasma rotation and transport in a toroidal geometry |
title_full |
Effects of internal DC biased ring on plasma rotation and transport in a toroidal geometry |
title_fullStr |
Effects of internal DC biased ring on plasma rotation and transport in a toroidal geometry |
title_full_unstemmed |
Effects of internal DC biased ring on plasma rotation and transport in a toroidal geometry |
title_sort |
effects of internal dc biased ring on plasma rotation and transport in a toroidal geometry |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.archives-ouvertes.fr/hal-00001738 https://hal.archives-ouvertes.fr/hal-00001738v2/document https://hal.archives-ouvertes.fr/hal-00001738v2/file/ICPP2004InternalBias1511.pdf |
long_lat |
ENVELOPE(16.546,16.546,68.801,68.801) |
geographic |
Tromso |
geographic_facet |
Tromso |
genre |
Tromso Tromso |
genre_facet |
Tromso Tromso |
op_source |
https://hal.archives-ouvertes.fr/hal-00001738 {date} |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/physics/0411193 hal-00001738 https://hal.archives-ouvertes.fr/hal-00001738 https://hal.archives-ouvertes.fr/hal-00001738v2/document https://hal.archives-ouvertes.fr/hal-00001738v2/file/ICPP2004InternalBias1511.pdf ARXIV: physics/0411193 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766218511211823104 |