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Investigation of laser-produced chlorine plasma radiation for non-monochromatic X-ray scattering experiments

Published online by Cambridge University Press:  21 September 2006

M. SCHOLLMEIER
Affiliation:
Technische Universität Darmstadt, Institut für Kernphysik, Darmstadt, Germany
G. RODRÍGUEZ PRIETO
Affiliation:
Gesellschaft für Schwerionenforschung mbH, Plasmaphysik, Darmstadt, Germany
F.B. ROSMEJ
Affiliation:
Physique des Interactions Ioniques et Moléculaires, UMR6633, Université d'Aix-Marseille 1 et CNRS, Centre de Saint Jérôme, Marseille, France
G. SCHAUMANN
Affiliation:
Technische Universität Darmstadt, Institut für Kernphysik, Darmstadt, Germany
A. BLAZEVIC
Affiliation:
Gesellschaft für Schwerionenforschung mbH, Plasmaphysik, Darmstadt, Germany
O.N. ROSMEJ
Affiliation:
Gesellschaft für Schwerionenforschung mbH, Plasmaphysik, Darmstadt, Germany
M. ROTH
Affiliation:
Technische Universität Darmstadt, Institut für Kernphysik, Darmstadt, Germany

Abstract

The chlorine Heα radiation of polyvinyl chloride (PVC) was investigated with respect to X-ray scattering experiments on dense plasmas. The X-ray source was a laser-produced plasma that was observed with a highly reflective highly oriented pyrolytic graphite (HOPG) crystal spectrometer as it is used in current x-ray scattering experiments on dense plasmas. The underlying dielectronic satellites of Heα cannot be resolved, therefore the plasma was observed at the same time with a focusing spectrometer with spatial resolution. To reconstruct the spectrum a simple model to calculate the spectral line emission based on dielectronic recombination and inner shell excitation of helium- and lithium-like ions was used. The analysis shows that chlorine dielectronic satellite emission is intense compared to Heα in laser-produced chlorine plasmas with a temperature of 300 eV in this wavelength range of Δλ = 0.07 Å (ΔE = 43 eV). The method proposed in this paper allows deducing experimentally the role of the underlying dielectronic satellites in the scatter spectrum measured with a HOPG crystal spectrometer. It is shown that the dielectronic satellites can be neglected when the scattering is measured with low spectral resolution in the non-collective regime. They are of major importance in the collective scatter regime where a high spectral resolution is necessary.

Type
Research Article
Copyright
© 2006 Cambridge University Press

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