A5039155577- Laser-induced spectroscopy and plasma
- Atomic and Molecular Physics
- Mass Spectrometry Techniques and Applications
- Spectroscopy and Laser Applications
- Plasma Diagnostics and Applications
- Advanced Chemical Physics Studies
- Laser-Plasma Interactions and Diagnostics
- Laser Design and Applications
- Atmospheric Ozone and Climate
- Magnetic confinement fusion research
- Spectroscopy and Quantum Chemical Studies
- Stellar, planetary, and galactic studies
- Plasma Applications and Diagnostics
- Astronomy and Astrophysical Research
- Laser-Matter Interactions and Applications
- Quantum optics and atomic interactions
- Astronomical Observations and Instrumentation
- Scientific Measurement and Uncertainty Evaluation
- Ion-surface interactions and analysis
- Molecular Spectroscopy and Structure
- Particle accelerators and beam dynamics
- Astrophysics and Star Formation Studies
- Dust and Plasma Wave Phenomena
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
Universidad de Valladolid
2010-2024
Optica
2011-2017
University of Córdoba
2008-2009
Eindhoven University of Technology
2008-2009
Institut Fresnel
2008
Ente Vasco de la Energía
2008
Centre National de la Recherche Scientifique
2008
Institute of Spectroscopy
2008
University of Florida
2008
Kurchatov Institute
2008
A set of tables the Stark width first three lines Lyman and Balmer series hydrogen, useful for plasma diagnosis purposes, is presented in this work. These have been obtained by means a fully recognized computer simulation technique. Computer experiments carried out density values between . Simulation temperatures range from 2245 K to 224 856 K. Ion dynamics effects are taken into account natural way most significative gas mixtures covered simulations, at reduced mass emitter - perturber pair...
A review of the models used for calculation Stark broadening spectrum plasmas is presented. The aim to provide an overview related theories using a simple formalism, useful introduction study this phenomenon, which encountered in plasma diagnostics. historical development followed and some problems that are currently under investigation mentioned.
Powerful laser-plasma processes are explored to generate discharge currents of a few $100\,$kA in coil targets, yielding magnetostatic fields (B-fields) excess $0.5\,$kT. The quasi-static provided from hot electron ejection the laser-irradiated surface. According our model, describing qualitatively evolution current, major control parameter is laser irradiance $I_{\mathrm{las}}\lambda_{\mathrm{las}}^2$. space-time B-fields experimentally characterized by high-frequency bandwidth B-dot probes...
Plasma spectroscopy is a fundamental tool for diagnosing laboratory and astrophysical plasmas. Accurate interpretation of spectra depends upon precise modeling comprehension Stark-broadening other mechanisms affecting spectral lines. In this context, computer simulations have emerged as invaluable tools, offering \textit{idealized experiments} with well-defined conditions. Molecular dynamics simulations, in particular, excel at replicating the particle interactions within plasma their impact...
Modeling the Stark broadening of spectral lines in plasmas is a complex problem. The problem has long history, since it plays crucial role interpretation observed laboratories and astrophysical plasmas. One difficulty characterization emitter’s environment. Although several models have been proposed over years, there no systematic studies results, until now. Here, calculations from stochastic numerical simulations are compared for Atoms 2014, 2 300 Lyman-α -β neutral hydrogen. Also discussed...
Experimental measurements of the center ${\mathrm{H}}_{\ensuremath{\beta}}$ Stark profile on three different installations have been done to study its asymmetry in wide ranges electron density, temperature, and plasma conditions. Theoretical calculations for analysis experimental results performed using standard theory computer simulations included separately quadrupolar quadratic effects. Earlier theoretical other authors reviewed as well. The are well reproduced by at high moderate densities.
This paper uses extended-magnetohydrodynamics (MHD) simulations to explore an extreme magnetized plasma regime realisable by cylindrical implosions on the OMEGA laser facility. is characterized highly compressed magnetic fields (greater than 10~kT across fuel), which contain a significant proportion of implosion energy and induce large electrical currents in plasma. Parameters governing different magnetization processes such as Ohmic dissipation suppression instabilities tension are...
This work reports measured Stark widths and shifts, transition probabilities for a large nubmer of Xe ii spectral lines. A pulsed arc was used as plasma source. The electron density, determined by interferometry at one wavelength, simultaneously the broadening 5016-\AA{} He i line, covers range (0.2--1.8)\ifmmode\times\else\texttimes\fi{}${10}^{23}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}3}$. method is proposed to find temperature from relative intensity measurements Electron temperatures are...
A simulation technique in which both electron and ion fields are jointly generated has been developed for hydrogen plasmas using a free independent particle model. It applied to the study of dynamics effects on H- alpha beta lines. comparison results with theoretical experimental data is included.
A very fast method for calculating line shapes in the presence of an external magnetic field accounting charge particle dynamics is proposed. It based on a reformulation frequency fluctuation model, which provides expression dynamic shape as functional static distribution function frequencies. In field, intensity and polarization emission depends angle between observation field's direction. Comparisons with numerical simulations experimental results various plasma conditions show good...
A mathematical treatment is presented in order to obtain the autocorrelation function necessary hydrogen Stark profiles calculations. The method reduces size of differential-equation systems appearing those ones, according SO(4) symmetry group for hydrogen. This technique suits computer-simulated
Context. The Stark broadening of the spectral lines wavelengths 501.6, 667.8, 728.1, 388.9, 587.6, and 706.5 nm from neutral helium in plasmas are studied theoretically experimentally.
The energies and constants of the hyperfine structure, derivatives one‐electron characteristics on nuclear radius, electric quadrupole, magnetic dipole moments for some Li‐like multicharged ions are calculated.
Context. We studied the Stark broadening of He I 492.2 nm line, which is sometimes used for plasma diagnostics or to obtain information on different stellar parameters.
Investigating the potential benefits of use magnetic fields in inertial confinement fusion experiments has given rise to experimental platforms like Magnetized Liner Inertial Fusion approach at Z-machine (Sandia National Laboratories) or its laser-driven equivalent OMEGA (Laboratory for Laser Energetics). Implementing these MegaJoule-scale laser facilities, such as MegaJoule (LMJ) Ignition Facility (NIF), is crucial reaching self-sustained nuclear and enlarges level magnetization that can be...
<i>Context. <i/>Stark broadening of the 447.1 line neutral helium in a weakly coupled plasma has been studied. This spectral very close forbidden component. means it is sensitive to electron density, which similar hydrogen lines, for Stark effect linear.<i>Aims. <i/>The aim this work supply information be used spectroscopic diagnostics plasmas.<i>Methods. <i/>We computer simulations frame physical model with weak coupling between charges. The calculation includes so-called "ion dynamics...
In this work, we briefly summarize the theoretical aspects of isolated line broadening. We present and discuss test run comparisons from different participating lineshape codes for 2s-2p transition LiI, B III NV.
A very extensive compilation of Stark widths and shifts for more than 125 Ar II visible spectral lines is presented in this work. These atomic parameters have been measured a pulsed discharge lamp by using different mixtures pure argon or helium. The electron density, which typically ranges from 0.2 to has determined interferometrically and, the case plasmas, also spectroscopically -Stark broadening. excitation temperature (15 000-31 000 K) Boltzmann-plot techniques intensity lines. detailed...
In the framework of Spectral Line Shapes in Plasmas Code Comparison Workshop (SLSP), large discrepancies appeared between different approaches to account for ion motion effects spectral line shape calculations. For a better understanding these effects, second edition SLSP August, 2013, two cases were dedicated study ionic field directionality on shapes. this paper, direction and magnitude fluctuations are separately analyzed. The variants electric models, (i) pure rotating with constant (ii)...
A systematic study of ion-dynamics effects in the first three lines Lyman and Balmer series hydrogen has been carried out over ranges ${10}^{22--}$${10}^{23}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}3}$ ${10}^{4--}$2\ifmmode\times\else\texttimes\fi{}${10}^{4}$ K by means a simulation technique that takes into account joint effect ions electrons. The results obtained considering static match through time ordering unified theory. inclusion ion movement simulations leads to excellent agreement...