Zobrazeno 1 - 10
of 7 095
pro vyhledávání: '"Viana, R"'
The main properties of a dynamical system can be analyzed by examining the corresponding basins, either attraction basins in dissipative systems or escape basins in open Hamiltonian systems and area-preserving maps. In the latter case, the selection
Externí odkaz:
http://arxiv.org/abs/2409.20373
We investigate the influence of the finite Larmor radius on the dynamics of guiding-center test particles subjected to an $\mathbf{E} \times \mathbf{B}$ drift in a large aspect-ratio tokamak. For that, we adopt the drift-wave test particle transport
Externí odkaz:
http://arxiv.org/abs/2407.15963
For several decades now it has been known that systems with shearless invariant tori, nontwist Hamiltonian systems, possess barriers to chaotic transport. These barriers are resilient to breakage under perturbation and therefore regions where they oc
Externí odkaz:
http://arxiv.org/abs/2406.19947
Recent evidences show that heteroclinic bifurcations in magnetic islands may be caused by the amplitude variation of resonant magnetic perturbations in tokamaks. To investigate the onset of these bifurcations, we consider a large aspect ratio tokamak
Externí odkaz:
http://arxiv.org/abs/2308.00810
Publikováno v:
Braz J Phys, 53, 96 (2023)
In tokamaks, modification of the plasma profiles can reduce plasma transport, improving particle confinement. However, this improvement is still not completely understood. In this work, we consider a drift wave test particle model to investigate the
Externí odkaz:
http://arxiv.org/abs/2306.00138
Area-preserving nontwist maps are used to describe a broad range of physical systems. In those systems, the violation of the twist condition leads to nontwist characteristic phenomena, such as reconnection-collision sequences and shearless invariant
Externí odkaz:
http://arxiv.org/abs/2209.07408
Publikováno v:
Fundamental Plasma Physics, 6, 100023(2023)
In tokamak-confined plasmas, particle transport can be reduced by modifying the radial electric field. In this paper, we investigate the influence of both a well-like and a hill-like shaped radial electric field profile on the creation of shearless t
Externí odkaz:
http://arxiv.org/abs/2209.02374
Publikováno v:
Physics Letters A, 453, 128481 (2022)
Intrinsically coupled nonlinear systems present different oscillating components that exchange energy among themselves. A paradigmatic example is the spring pendulum, which displays spring, pendulum, and coupled oscillations. We analyze the energy ex
Externí odkaz:
http://arxiv.org/abs/2208.06390
Some internal transport barriers in tokamaks have been related to the vicinity of extrema of the plasma equilibrium profiles. This effect is numerically investigated by considering the guiding-center trajectories of plasma particles undergoing ExB dr
Externí odkaz:
http://arxiv.org/abs/2207.02823
Autor:
González-Arenzana, L., Santamaría, P., Gutiérrez, A.R., Escribano-Viana, R., López-Alfaro, I.
Publikováno v:
In Journal of Agriculture and Food Research December 2024 18
