The properties of plasma turbulence in a poloidally limited scrape-off layer (SOL) are addressed, with focus on ISTTOK, a large aspect ratio tokamak with a circular cross section. Theoretical investigations based on the drift-reduced Braginskii equations are carried out through linear calculations and non-linear simulations, in two- and three-dimensional geometries. The linear instabilities driving turbulence and the mechanisms that set the amplitude of turbulence as well as the SOL width are identified. A clear asymmetry is shown to exist between the low-field and the high-field sides of the machine. While the comparison between experimental measurements and simulation results shows good agreement in the far SOL, large intermittent events in the near SOL, detected in the experiments, are not captured by the simulations.
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October 2016
Research Article|
October 21 2016
Plasma turbulence in the scrape-off layer of the ISTTOK tokamak
Rogério Jorge
;
Rogério Jorge
a)
1
École Polytechnique Fédérale de Lausanne (EPFL)
, Swiss Plasma Center (SPC), CH-1015 Lausanne, Switzerland
2Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico,
Universidade de Lisboa
, 1049-001 Lisboa, Portugal
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Paolo Ricci
;
Paolo Ricci
1
École Polytechnique Fédérale de Lausanne (EPFL)
, Swiss Plasma Center (SPC), CH-1015 Lausanne, Switzerland
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Federico D. Halpern;
Federico D. Halpern
1
École Polytechnique Fédérale de Lausanne (EPFL)
, Swiss Plasma Center (SPC), CH-1015 Lausanne, Switzerland
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Nuno F. Loureiro;
Nuno F. Loureiro
3Plasma Science and Fusion Center,
Massachusetts Institute of Technology
, Cambridge, Massachusetts 02139, USA
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Carlos Silva
Carlos Silva
2Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico,
Universidade de Lisboa
, 1049-001 Lisboa, Portugal
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Phys. Plasmas 23, 102511 (2016)
Article history
Received:
June 30 2016
Accepted:
September 29 2016
Citation
Rogério Jorge, Paolo Ricci, Federico D. Halpern, Nuno F. Loureiro, Carlos Silva; Plasma turbulence in the scrape-off layer of the ISTTOK tokamak. Phys. Plasmas 1 October 2016; 23 (10): 102511. https://doi.org/10.1063/1.4964783
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