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X-Ray Spectroscopy of Laser-Produced Plasmas

Published online by Cambridge University Press:  12 April 2016

Robert L. Kauffman
Robert L. Kauffman*
Affiliation:
Lawrence Livermore National Laboratory Livermore, California 94550

Extract

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Laser-produced plasmas have some of the highest temperatures and densities obtainable in the laboratory. This offers the opportunity to perform spectroscopic studies in new temperature and density regimes under controlled laboratory conditions. Temperatures can range from greater than 1 keV to less than 1 eV, while densities range from less than 1020e−/cm3 to greater than 1023e−/cm3. X-ray spectroscopy has been an important tool in diagnosing these large ranges of temperature and density. Relative line intensities of resonance and satellite lines can be used to diagnose the lower densities and higher temperatures. (Galanti and Peacock 1975, Boilo et al. 1979) For the denser plasmas Stark broadening is a good density diagnostic. (Yaakobi et al. 1977) Absorption spectroscopy measuring edge shifts had recently been used to probe the low temperature, high density region. These plasmas, with their high-energy density, are transient with total time scales ranging from 100 psec to greater than 1 nsec, depending on the laser driver pulse. In order to make detailed measurements from these plasmas, sensitive, time-resolved spectrographs have been developed. (Lewis et al. 1980, Kauffman et al. 1983) These spectrographs can measure time histories of spectral lines with resolving powers of 300 or greater and with time-resolutions of 20 psec. By using such instruments, studies of the dynamics of the plasma can be made.

Type
Session 7. High Density Laboratory Plasmas
Information
International Astronomical Union Colloquium , Volume 86: Eighth International Colloquium on Ultraviolet and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas , 1984 , pp. 229 - 233
Copyright
Copyright © Naval Research Laboratory 1984. Publication courtesy of the Naval Research Laboratory, Washington, DC.

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