K-shell and L-shell plasma spectroscopy experiments

Charatis, G

doi:10.2172/6608225

Title: K-shell and L-shell plasma spectroscopy experiments

Full Record
Other Related Research

Abstract

Detailed atomic level populations in high temperature and dense plasmas have become increasingly important in laser generated plasmas. Certain spectral line intensity ratios are density-dependent while others are temperature-dependent. Both can be used to extract information concerning population kinetics and ion level populations. In order to be useful these dependencies must be characterized by independent means. In laser produced plasmas this can be done via holographic interferometry for electron density determinations and via the slope of the H-like free-bound continuum of K-shell lines for electron temperature determinations. The characterization of density- and temperature-dependent L-shell lines can be accomplished in ionization balance experiments in which laser irradiance is varied on targets which contain both K-shell and L-shell emitters. The K-shell free-bound continua provide the local temperature determination while holographic interferometry yields density profile information, from which the temperature and density dependent L-shell lines can be characterized. This paper discusses these concepts.

Authors:

Charatis, G ^[1]

KMS Fusion, Inc., Ann Arbor, MI (USA)

Publication Date:: Mon Oct 01 00:00:00 EDT 1990

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); KMS Fusion, Inc., Ann Arbor, MI (USA)

Sponsoring Org.:: DOE/DP

OSTI Identifier:: 6608225

Report Number(s):: UCRL-CR-106064
ON: DE91000950

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 74 ATOMIC AND MOLECULAR PHYSICS; ELECTRON TEMPERATURE; PLASMA DIAGNOSTICS; LASER-PRODUCED PLASMA; SPECTROSCOPY; ENERGY-LEVEL TRANSITIONS; IONIZATION; K SHELL; L SHELL; MOLYBDENUM; PROGRESS REPORT; DOCUMENT TYPES; ELECTRONIC STRUCTURE; ELEMENTS; METALS; PLASMA; TRANSITION ELEMENTS; 640302* - Atomic, Molecular & Chemical Physics- Atomic & Molecular Properties & Theory

Citation Formats


                    Charatis, G. K-shell and L-shell plasma spectroscopy experiments.  United States: N. p., 1990. 
        Web.  doi:10.2172/6608225.

Copy to clipboard


                    Charatis, G. K-shell and L-shell plasma spectroscopy experiments.  United States.  https://doi.org/10.2172/6608225

Copy to clipboard


                    Charatis, G. 1990.  
        "K-shell and L-shell plasma spectroscopy experiments".  United States.  https://doi.org/10.2172/6608225.  https://www.osti.gov/servlets/purl/6608225.

Copy to clipboard


                    
@article{osti_6608225,

  title        = {K-shell and L-shell plasma spectroscopy experiments},

  author       = {Charatis, G},

  abstractNote = {Detailed atomic level populations in high temperature and dense plasmas have become increasingly important in laser generated plasmas. Certain spectral line intensity ratios are density-dependent while others are temperature-dependent. Both can be used to extract information concerning population kinetics and ion level populations. In order to be useful these dependencies must be characterized by independent means. In laser produced plasmas this can be done via holographic interferometry for electron density determinations and via the slope of the H-like free-bound continuum of K-shell lines for electron temperature determinations. The characterization of density- and temperature-dependent L-shell lines can be accomplished in ionization balance experiments in which laser irradiance is varied on targets which contain both K-shell and L-shell emitters. The K-shell free-bound continua provide the local temperature determination while holographic interferometry yields density profile information, from which the temperature and density dependent L-shell lines can be characterized. This paper discusses these concepts.},

  doi          = {10.2172/6608225},

  url          = {https://www.osti.gov/biblio/6608225},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon Oct 01 00:00:00 EDT 1990},

  month        = {Mon Oct 01 00:00:00 EDT 1990}

}

Copy to clipboard

Technical Report:

View Technical Report (0.62 MB)

https://doi.org/10.2172/6608225

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Space and time resolved spectroscopy of laser-produced plasmas: A study of density-sensitive x-ray transitions in helium-like and neon-like ions

Technical Report Young, Bruce

The determination of level populations and detailed population mechanisms in dense plasmas has become an increasingly important problem in atomic physics. In this work, the density variation of line intensities and level populations in aluminum K-shell and molybdenum and silver L-shell emission spectra have been measured from high-powered, laser-produced plasmas. For each case, the density dependence of the observed line emission is due to the effect of high frequency electron-ion collisions on metastable levels. The density dependent line intensities vary greatly in laser-produced plasmas and can be used to extract detailed information concerning the population kinetics and level populations ofmore »« less
https://doi.org/10.2172/6682739

Full Text Available
X-ray Spectroscopy of K- and L-shell Z-pinch and Astrophysical Plasmas

Journal Article Dasgupta, A; Davis, J; Giuliani, J; ... - AIP Conference Proceedings

In recent years, there have been significant advances in instrumental capabilities for making X-ray spectroscopic measurements of astrophysical plasmas. There have been corresponding improvements in X-ray diagnostics for advanced multi-mega-ampere pulse power machines that produce increasingly large radiative yields from gas-puff and wire array Z pinch plasmas. Analysis used for Z pinches can be used to study ICF and also astrophysical plasmas where laboratory measurements and simulations are the only means to interpret observed data. The astrophysical data for Fe, the most cosmically abundant high Z element, can provide a wealth of information about cosmic plasmas. Fe is also themore »« less
https://doi.org/10.1063/1.3241192
Simultaneously time- and space-resolved spectroscopic characterization of laser-produced plasmas

Conference Charatis, G; Young, B; Busch, G; ...

The CHROMA laser facility at KMS Fusion has been used to irradiate a variety of microdot targets. These include aluminum dots and mixed bromine dots doped with K-shell (magnesium) emitters. Simultaneously time- and space-resolved K-shell and L-shell spectra have been measured and compared to dynamic model predictions. The electron density profiles are measured using holographic interferometry. Temperatures, densities, and ionization distributions are determined using K-shell and L-shell spectral techniques. Time and spatial gradients are resolved simultaneously using three diagnostics: a framing crystal x-ray spectrometer, an x-ray streaked crystal spectrometer with a spatial imaging slit, and a 4-frame holographic interferometer. Significantmore »« less
Full Text Available
Unraveling the intrinsic atomic physics behind x-ray absorption line shifts in warm dense silicon plasmas

Journal Article Karasiev, Valentin; Hu, S. - Physical Review E

Here, we present a novel free-energy density functional theory (DFT)-based methodology for optical property calculations of warm dense matter to cover a wide range of thermodynamic conditions and photon energies including the entire x-ray range. It uses Mermin–Kohn–Sham density functional theory with exchange-correlation (XC) thermal effects taken into account via a fully temperature dependent generalized gradient approximation XC functional. The methodology incorporates a combination of the ab initio molecular dynamics (AIMD) snapshotted Kubo–Greenwood optic data with a single-atom in simulation cell calculations to close the photon energy gap between the L and K edges and extend the K-edge tail towardmore »« less
https://doi.org/10.1103/physreve.103.033202

Full Text Available
Space- and time-resolved spectroscopy of laser-produced plasmas: Study of density-sensitive x-ray transitions in helium-like and neon-like ions

Miscellaneous Young, B

The determination of level populations and detailed population mechanisms in dense plasmas has become an increasingly important problem in atomic physics. In the present work, the density variation of line intensities and level populations in aluminum K-shell and molybdenum and silver L-shell emission spectra have been measured from high-powered, laser-produced plasmas. For each case, the density dependence of the observed line emission is due to the effect of high frequency electron-ion collisions on metastable levels. The density dependent line intensities vary greatly in laser-produced plasmas and can be used to extract detailed information concerning the population kinetics and level populationsmore »« less

Similar Records