15 research outputs found
Atomic-orbital Close-coupling Calculations of Electron Capture from Hydrogen Atoms into Highly Excited Rydberg States of Multiply Charged Ions
Charge exchange and ionisation in N, N, C - H() collisions studied systematically by theoretical approaches
The introduction of gases like nitrogen or neon for cooling the edge region
of magnetically confined fusion plasmas has triggered a renewed interest in
state selective cross sections necessary for plasma diagnostics by means of
charge exchange recombination spectroscopy. To improve the quality of
spectroscopic data analysis, charge exchange and ionisation cross sections for
N + H() have been calculated using two different theoretical
approaches, namely the atomic-orbital close-coupling method and the classical
trajectory Monte Carlo method. Total and state resolved charge exchange cross
sections are analysed in detail.
In the second part, we compare two collision systems involving equally
charged ions, C and N on atomic hydrogen. The analysis of the
data lead to the conclusion that deviations between these two impurity ions are
practically negligible. This finding is very helpful when calculating cross
sections for collision systems with heavier not completely stripped impurity
ions.Comment: 21 pages, 10 figures, 6 data table
w2dynamics: Local one- and two-particle quantities from dynamical mean field theory
We describe the hybridization-expansion continuous-time quantum Monte Carlo code package “w2dynamics”, developed in Wien and Würzburg. We discuss the main features of this multi-orbital quantum impurity solver for the Anderson impurity model, dynamical mean field theory as well as its coupling to density functional theory. The w2dynamics package allows for calculating one- and two-particle quantities; it includes worm and further novel sampling schemes. Details about its download, installation, functioning and the relevant parameters are provided