The effect of particle recombination in the scrape-off-layer is investigated performing particle in cell (PIC) simulation of tokamak plasma. For this purpose special routines for Monte Carlo simulation of radiative and collisional recombination are developed using theoretical predictions for the rate coefficients validated up to 100eV . Simulations with plausible assumptions for the density pro...

This paper studies the relevance of the arithmetic mean and standard deviation used to describe a dataset of aerosol optical thicknesses or radiative effects. The authors argue that these quantities are misleading in many cases. Since the published mean and standard deviation are often used when comparing different studies, and are the numbers reported in high profile works such as the IPCC ass...

We present a multi–wavelength spectral analysis of the DA white dwarf G 191-B2B. The employed atmospheric models account for gravitational settling and radiative levitation, which are, for the first time, calculated self-consistently with the atmospheric structure. The resulting spectra can reproduce the complete EUVE spectrum and the ultraviolet lines of iron. Some restrictions regarding the U...

We propose an efficient algorithm to perform nonlinear data assimilation for Korteweg– de Vries solitons. In particular we develop a reduced particle filtering method to reduce the dimension of the problem. The method decomposes a solitonic pulse into a clean soliton and small radiative noise, and instead of inferring the complete pulse profile, we only infer the two soliton parameters with par...

Extending previous work (Albrecht & Kegel 1987, Kegel et al. 1993, Piehler & Kegel 1994), we investigated the formation of interstellar molecular lines in a medium with stochastic density and velocity fluctuations. We solved the full NLTE– problem, i.e. the generalized radiative transfer equation simultaneously with the rate equations, for a 6–level CO molecule and a plane-parallel slab geometr...

The three-dimensional, hydrodynamic stability of the solar tachocline is investigated based on a rotation profile as a function of both latitude and radius. By varying the amplitude of the latitudinal differential rotation, we find linear stability limits at various Reynolds numbers by numerical computations. We repeated the computations with different latitudinal and radial dependences of the ...

An inhomogeneous differential equation method is used to calculate the Rayleigh and Raman scattering cross sections for atomic hydrogen and atomic caesium as functions of wavelength below and above the ionization limits. The profile of the scattering cross section near the 6s-6p resonance of atomic caesium is determined by including an energyindependent radiative width in the scattering formula...

Dynamical processes are progressively introduced in stellar evolution. In this framework, the Sun is a very specific case where both models and observations have been developed in parallel during the last decade in order to progress on our present insight of solar like stars. In this poster I show the recent progress done on both sides for the rotation of the radiative zone. The present knowled...

We study the phenomena of radiative-driven shock waves using a semi-analytic model based on self similar solutions radiative hydrodynamic problem. The relation between hohlraum drive temperature $T_{\mathrm{Rad}}$ and resulting ablative $D_S$ is well-known method for estimation temperature. However, various studies yield different scaling relations $D_S$, simulations. In [T. Shussman S.I. Heizl...

The broadband line-by-line analysis of radiative transfer in the atmosphere is extremely demanding with regard to computational resources. As a remedy, we present here calculation uniform error bounds for approximating classical Voigt profile. A new "full" profile, which can be expressed as combination two Faddeeva evaluations, also presented and included analysis. used rigorously determine dom...