CV Lattes
ResearcherID
ORCID
Universidade de São Paulo (USP). Instituto de Física (IF) (Institutional affiliation for the last research proposal) Birthplace: Brazil
Bachelor's at Physic from Universidade de São Paulo (1970), master's at Physic from Universidade de São Paulo (1973) and doctorate at Physic from Universidade de São Paulo (1979). Has experience in Physics, focusing on Physics of Fluids, Plasma Physics and Electrical Discharges, acting on the following subjects: tokamak, chaos, caos, turbulence and plasma edge. (Source: Lattes Curriculum)
| News published in Agência FAPESP Newsletter about the researcher |
| TITULO |
| Articles published in other media outlets (0 total): |
| More itemsLess items |
| VEICULO: TITULO (DATA) |
| VEICULO: TITULO (DATA) |
Non-integrable Hamiltonian systems typically present chaotic orbits, due to the existence of homoclinic tangles. One of the consequences is the occurrence of fractal structures, like escape basins in open systems. There are several problems of interest in Plasma Physics which can be described by open non-integrable Hamiltonian systems, and which present fractal structures in escape basins…
We apply basic theories of chaos and turbulence to investigate the control of chaotic dynamical systems. For hamiltonian systems, we investigate the transition to chaos and the onset and break of transport barriers, as observed in magnetically confined plasmas and particle accelerators. We also investigate the turbulence onset in magnetically confined plasmas and interpret control experim…
In this academic visit, we will develop the concept of real-time vulnerability of synchronized states. Specifically, we propose that the susceptibility of synchronization in systems coupled with respect to perturbations in their oscillatory dynamics has a temporal component, i.e., the consequences for synchronization depend on the instant the disturbance is applied. To develop this aspect…
These theoretical studies will be intimately connected with the investigation of experimental and natural dynamical networks of increasing complexity starting from a few coupled lasers, via hybrid networks of neurons to the system Earth. The latter one is a special challenge for the network theory and it will be a focus of this project. A main topic will be the understanding of the functi…
The MHD instabilities driven by fast particles, produced by fusion reactions, are an important issue for tokamak plasmas. The effects of these instabilities on the confinement and on other MHD instabilities are still unclear. We will investigate the excitation threshold and dynamics of these modes in order to evaluate models used to predict their effect in next fusion devices. Resonant ma…
(Only some records are available in English at this moment)
Analyze symplectic maps introduced to describe magnetic field lines in plasmas. Consider external electric currents to Investigate the control of the chaotic magnetic fields in plasmas.(AU)
To investigate the chaotic particle transport in a plasma magnetically confined in Texas Helimak, due to the drift created by the equilibrium magnetic and electric fields and the perturbing electric field applied in electrodes at the plasma edge. (AU)
Investigate the chaotic particle transport, in magnetically confined plasmas, due to particles drift in the equilibrium magnetic and electric fields and their perturbations created by external coils. (AU)
(Only some records are available in English at this moment)
Apply symplectic maps to investigate the control of chaotic transport in magnetically confined plasmas in tokamaks, perturbed by external resonant currents and electrodes at the plasma edge. (AU)
Circadian cycles exist in all phylogenetic scale. In mammals they are controlled mainly by the suprachiasmatic nucleus (SNC). Changes in the environment may generate misalignments between the natural circadian cycles and the external cues. For instance, this occurs in long trips over several time-zones (jet-lag) and in nocturnal shifts of work (social jet-lag). In this work, we aim to ext…
We consider the interaction between charged particles and electrostatic waves, and we study the regular particle acceleration that occurs in the resonant islands. Regular particle acceleration is strongly influenced by the presence of chaos in phase space, which destroys regular trajectories. In this project, we investigate new methods that are able to control chaos with a low energy cost…
(Only some records are available in English at this moment)
In this project, we investigate the anomalous transport in phase spaces of symplectic maps via two novel theoretical approaches. The diffusion in specific regions of the phase space can be described by a simple rule of summations in a discrete numerical process and, additionally, a few properties from complex network analysis can be suitable to characterize different dynamic regimes of in…
When a laser pulse resonantly interacts with an over-dense plasma, surface plasma waves (SPWs) arise on the vacuum-plasma interface. Electrons on the plasma side move to the vacuum side and are accelerated by the SPWs. For high laser intensities, a great number of electrons reach relativistic velocities, and form a collimated beam with energies in the MeV range, and total charge up to ~65…
The rate at which Earth's ecosystems lose biodiversity through extinctions is increasing due to human activity. Generally, the disappearance of a species in a ecosystem occur gradually, offering ways to revert extinctions. However, the existence of oscillating states in ecosystems, mainly due to external forcing, may lead to whole different scenario. Specifically, we propose that the proc…
(Only some records are available in English at this moment)
| 2 / 2 | Ongoing research grants |
| 20 / 11 | Completed research grants |
| 5 / 5 | Ongoing scholarships in Brazil |
| 40 / 18 | Completed scholarships in Brazil |
| 13 / 10 | Completed scholarships abroad |
| 80 / 46 | All research grants and scholarships |
| Associated processes | |