| Full text | |
| Author(s): |
Fraile, Jr., Andre Carlos
[1, 2]
;
Roberto, Marisa
[1]
;
Caldas, Ibere Luiz
[3]
;
Lopes Martins, Caroline Gameiro
[1]
Total Authors: 4
|
| Affiliation: | [1] Inst Tecnol Aeronaut, Dept Fis, BR-12228900 Sao Jose Dos Campos - Brazil
[2] Inst Estudos Avancados, Dept Aerotermodinam & Hiperson, BR-12228001 Sao Jose Dos Campos - Brazil
[3] Univ Sao Paulo, Inst Fis, Dept Fis Aplicada, BR-05315970 Sao Paulo - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | IEEE TRANSACTIONS ON PLASMA SCIENCE; v. 45, n. 11, p. 2906-2912, NOV 2017. |
| Web of Science Citations: | 3 |
| Abstract | |
In this paper, a plasma response model is investigated for large aspect ratio tokamaks, on the presence of external nonaxisymmetric resonant magnetic perturbations. To control plasma confinement, the plasma is perturbed by external resonant helical windings, similar to those introduced by an ergodic magnetic limiter. The plasma response to the perturbation is modeled as an additional magnetic perturbation, created by a current sheet on the main perturbed resonant surface, vanishing the radial component of the total magnetic field in the considered resonant surface. In order to show the influence of the plasma response on the field line topology, the field line differential equations are integrated numerically, showing the reduction of magnetic island sizes and the regularization of chaotic regions around the resonant surface where the response was introduced, in agreement with results observed in sophisticated simulation codes. Finally, the connection lengths indicate that, regarding their distribution, the plasma response introduces a homogenization effect which may affect the deposition patterns at the tokamak wall. (AU) | |
| FAPESP's process: | 15/16471-8 - Fusion plasma applications and modeling of low temperature plasmas |
| Grantee: | Marisa Roberto |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 11/19296-1 - Nonlinear dynamics |
| Grantee: | Iberê Luiz Caldas |
| Support Opportunities: | Research Projects - Thematic Grants |