Transport of magnetic field lines and particles in tokamaks and plasma modeling fo...
Fusion plasma applications and modeling of low temperature plasmas
| Full text | |
| Author(s): |
Souza, L. C.
;
Mathias, A. C.
;
Caldas, I. L.
;
Elskens, Y.
;
Viana, R. L.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Chaos; v. 33, n. 8, p. 17-pg., 2023-08-01. |
| Abstract | |
The E x B drift motion of particles in tokamaks provides valuable information on the turbulence-driven anomalous transport. One of the characteristic features of the drift motion dynamics is the presence of chaotic orbits for which the guiding center can experience large-scale drifts. If one or more exits are placed so that they intercept chaotic orbits, the corresponding escape basins structure is complicated and, indeed, exhibits fractal structures. We investigate those structures through a number of numerical diagnostics, tailored to quantify the final-state uncertainty related to the fractal escape basins. We estimate the escape basin boundary dimension through the uncertainty exponent method and quantify final-state uncertainty by the basin entropy and the basin boundary entropy. Finally, we recall the Wada property for the case of three or more escape basins. This property is verified both qualitatively and quantitatively using a grid approach. (AU) | |
| FAPESP's process: | 22/04251-7 - Fractal Structures in Plasma Physics |
| Grantee: | Iberê Luiz Caldas |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - Brazil |
| FAPESP's process: | 18/03211-6 - Non linear dynamics |
| Grantee: | Iberê Luiz Caldas |
| Support Opportunities: | Research Projects - Thematic Grants |