[PDF] Top 20 Braz. J. Phys. vol.34 número4B

... In this special issue of the Braz. J. Phys. we publish the proceedings of the X Latin American Workshop on Plasma Physics (LAWPP) combined with the 7th Brazilian Meeting on Plasma Physics (7o. ... See full document

... In order to obtain better values for oscillator strengths, we calculated the reduced matrix elements P 1 by using op- timized values of energy parameters which were adjusted from a least-squares procedure. In the ... See full document

... We compare and discuss several approximations to the dispersion relation for electrostatic waves in inhomoge- neous plasmas, either obtained directly from Poisson’s equation, or from the[r] ... See full document

... Similar calculations must be now developed for the other components of the effective dielec- tric tensor, in order to verify if Onsager symmetry is indeed satisfied by the tensor, as dem[r] ... See full document

... In this study, we explore the hypothesis that the mag- netic fields observed in high redshift galaxies are created by small scale, stochastic, turbulent helical dynamos, rather than mean[r] ... See full document

... A Fast Neutral Lithium Beam (FNLB) diagnostics was developed to perform the measurement of the density profile and its fluctuations at the edge of the plasma in ETE.. The first light sig[r] ... See full document

... The consequences of the action of the magnetic field are that the electron free paths across the residual gas are lengthened and also that the lateral diffusion of the electrons can be reduced. These combined effects ... See full document

... Experimental results has shown that UHMWPE surface mechanical properties such as hardness and elastic modulus can be improved by induced chain cross-linking between the macromolecules on[r] ... See full document

... lated from the Vlasov-Boltzmann equation for each harmo- nic taking into account electron Landau damping, electron- ion collisions, and finite Larmor radius effect. A multi-fluid plasma model is used in the ALTOK code ... See full document

... Cr films were deposited by electron beam on SAE 1020 surface and then bombarding either by nitrogen Plasma Immersion Ion Implantation (PIII) or ion beam (IB) Cr atoms are recoil in- trod[r] ... See full document

... The aim of this work has been to produce carbon nanostructures in a thermal plasma jet using a plasma torch, where gases (methane, acetylene) or liquids (benzene) rich in carbon, as well[r] ... See full document

... The electric field lines, the typical ion trajectories and the axial distributions of implantation current (actually implantation current per unit length in cylindrical symme- try) for t[r] ... See full document

... [9] C. Moreno, A. Clausse, J. Mart´ınez, R. Llovera, A. Tartagli- one, M. V´enere, R. Barbuzza, and M. del Fresno, IX Latin American Workshop on Plasma Physics, La Serena, Chile, AIP Conference Proc., 563, H. ... See full document

... The threshold for reconnection of even-period orbits, which is the same as the point of collision of their hy- perbolic points, can be obtained by using the numerical observation[18] tha[r] ... See full document

... [26] E.A. Lerche, E. Ozono, L.F. Ruchko, R. M. O. Galv˜ao, A.G. Elfimov, Yu. K. Kuznetsov, I.C. Nascimento, A. N. Fagundes, W.P. de S´a, E. Sanada, J.I. Elizondo, D.O. Campos, R. Va- lencia, A. Vannucci, M.V.P. Heller, ... See full document

... A microwave reflectometer with fixed frequency was used to register plasma density oscillations driven by the excited Alfv´en waves, under the condition of the spectrum scanned by a cont[r] ... See full document

... The characteristics of the antenna sys- tem design with respect to the antenna-plasma coupling and plasma wave excitation for different phasing of the feeding currents are summarized....[r] ... See full document

... Since the LMA region has now been established as the solution to the solar neutrino problem, discarding the RSFP mechanism as the responsible for neutrino conversion, the claimed link be[r] ... See full document

... In this second part, we will discuss the results obtained by a hybrid process involving higher energy PIII (10 to 15 kV) combined with a low pressure nitriding, applied to SS304 and Ti6A[r] ... See full document

... Two dimensional relaxed states of flux core Sphe- romaks sustained by helicity injection show a large region of closed flux surfaces and significant toroidal current. Chan- ging the resi[r] ... See full document