Autor(es)

Haerter, P. ; Viana, R. L. ; Leonel, E. D.

• Tipo de documento: Artigo Científico
• Fonte: CHAOS SOLITONS & FRACTALS; v. 200, p. 11-pg., 2025-09-11.

Resumo

<ol><li>This study investigates how two-and three-wave configurations govern particle escape and transport in tokamak edge plasmas. Using a Hamiltonian model derived from drift-wave turbulence, we analyze test particle dynamics through Poincar & eacute; maps, fractal escape basins, and entropy metrics. Introducing a third wave increases basin entropy, enhancing particle escape rates while reducing basin boundary entropy, indicative of suppressed basin mixing. Escape time analyses reveal resonant scattering disrupts coherent transport pathways, linking fractal absorption patterns to heat load mitigation in divertors. Characteristic transport is also analyzed and regimes transition between anomalous (alpha > 1) and normal diffusion (alpha approximate to 1), two-wave systems sustain anomalous transport, while the third wave homogenizes fluxes through stochastic scattering. Fractal structures in escape basins and entropy-driven uncertainty quantification suggest strategies to engineer transport properties, balancing chaos and order for optimized confinement.</li> </ol> (AU)

• Processo FAPESP: 19/14038-6 - Investigação de propriedades dinâmicas em sistemas não lineares
• Beneficiário: Edson Denis Leonel
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 21/09519-5 - Caracterização de transições de fase em sistemas não lineares
• Beneficiário: Edson Denis Leonel
• Modalidade de apoio: Auxílio à Pesquisa - Regular