Plasma Diagnostics Using K-Line Emission Profiles of Argon
Abstract
K-line profiles emitted from a warm dense plasma environment are used for diagnostics of Ar droplet plasmas created by high energy laser pulses. We observe temperature gradients within the Ar droplet from cold temperatures of the order of some 10 eV up to higher temperatures of about 170 eV. Non-perturbative wave functions are calculated as well as ionization energies, binding energies and relevant emission energies using a chemical {\it ab initio} code. The plasma screening is considered within a perturbative approach to the Hamiltonian. The plasma effect influences the many-particle system resulting in energy shifts due to electron-ion and electron-electron interaction. With this approach we get a good reproduction of spectral features that are strongly influenced by ionization and excitation processes within the plasma. Comparing with the widely known FLYCHK code, counting for internal degrees of freedom (bound states) and treating pressure ionization within our quantum statistical approach leads to different results for the inferred temperature distribution.
Cite
@article{arxiv.1411.2631,
title = {Plasma Diagnostics Using K-Line Emission Profiles of Argon},
author = {Yiling Chen and Andrea Sengebusch and Heidi Reinholz and Gerd Röpke},
journal= {arXiv preprint arXiv:1411.2631},
year = {2017}
}
Comments
K-shell emission spectra are critically dependent on the number of atomic configurations considered. The few lowest lying configurations, as used in this paper, are NOT able to explain the features shown in P. Neumayer's spectra of warm dense matter. Some equations and intermediate results require further explanations not given in this manuscript. For a new paper on the topic see arXiv:1709.08493