Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Vijay Sonnad"'
Publikováno v:
High Energy Density Physics. 9:457-461
First principles microphysics models are essential to the design and analysis of high energy density physics experiments. Using experimental data to investigate the underlying physics is also essential, particularly when simulations and experiments a
Autor:
Vijay Sonnad, Carlos A. Iglesias
Publikováno v:
High Energy Density Physics. 8:154-160
The unresolved transition array (UTA) model of atomic spectra describes the lines in a configuration-to-configuration transition array with a single feature that conserves the total strength as well as the energy first and second strength-weighted mo
Autor:
Carlos A. Iglesias, Vijay Sonnad
Publikováno v:
High Energy Density Physics. 7:391-399
The efficiency of several algorithms to calculate Stark broadened line shapes in the quasi-static ion approximation is compared. The algorithms can be grouped into three general approaches: simultaneous equation solvers, matrix decompositions, and mo
Autor:
Vijay Sonnad, Carlos A. Iglesias
Publikováno v:
High Energy Density Physics. 7:43-46
A method for efficient generation of spectra using line-by-line approaches is presented. The only approximation is replacing the line shape function with an interpolation procedure, which makes the method independent of the line profile functional fo
Autor:
Vijay Sonnad, Carlos A. Iglesias
Publikováno v:
High Energy Density Physics. 6:391-398
The quasi-static ion approximation of Stark broadened spectral lines involves an average of the field-dependent line shape over the microfield probability distribution. In the conventional approach, this can become computationally expensive since the
Autor:
Vijay Sonnad, Carlos A. Iglesias
Publikováno v:
High Energy Density Physics. 6:399-405
A method previously developed to solve large-scale linear systems is applied to quasi-static Stark line broadening calculations. The method is formally exact, numerically stable, and allows optimization of the integration over the quasi-static field
Publikováno v:
High Energy Density Physics. 5:97-104
It is shown that theoretical Rosseland mean opacities are sensitive to spectral line shape models. Due to computational constraints, however, opacity codes typically use Voigt or Lorentz profiles. Both of these profiles have an incorrect far wing beh
Publikováno v:
Physics Letters A. 291:226-231
Several equation of state models for hot, dense matter are compared with experimental data for the shock Hugoniots of beryllium, aluminum, iron, copper, and molybdenum up to extreme pressures. The best models are in good agreement with experiment and
The complex nature of inertial confinement fusion (ICF) experiments results in a very large number of experimental parameters that are only known with limited reliability. These parameters, combined with the myriad physical models that govern target
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d847163b027de9e6583ca5cd6452fc20
http://arxiv.org/abs/1302.5745
http://arxiv.org/abs/1302.5745
Publikováno v:
International Journal of High Speed Computing. :1-12
Given the coordinates of N points in D dimensions, the Barnes-Hut tree algorithm produces an ordered list so that successive pairs in the sequence are nearest neighbors, sets of four form a cluster, sets of eight form a bigger cluster, and so on. We