Synergistic approach to modeling X-ray spectra

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Plasma emission models used in X-ray astronomy need to simulate X-ray spectra from at least thirteen elements. Development of comprehensive models requires large-scale calculations; for example, Fe M-shell spectra, K{alpha} fluorescence from near-neutral ions, and dielectronic recombination satellite spectra from L-shell ions. Current and recent missions (EUVE, ASCA, DXS, etc.) have already demonstrated the need for major, rapid improvements in spectral models. The high-resolution spectra to be acquired with the next generation of X- ray observatories (AXAF, XMM, Astro-E) promise to push spectral models to their limits. Essential to ensuring the quality of calculations used in spectral codes is corroboration ... continued below

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7 p.

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Liedahl, D.A., LLNL July 1, 1998.

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Description

Plasma emission models used in X-ray astronomy need to simulate X-ray spectra from at least thirteen elements. Development of comprehensive models requires large-scale calculations; for example, Fe M-shell spectra, K{alpha} fluorescence from near-neutral ions, and dielectronic recombination satellite spectra from L-shell ions. Current and recent missions (EUVE, ASCA, DXS, etc.) have already demonstrated the need for major, rapid improvements in spectral models. The high-resolution spectra to be acquired with the next generation of X- ray observatories (AXAF, XMM, Astro-E) promise to push spectral models to their limits. Essential to ensuring the quality of calculations used in spectral codes is corroboration in the laboratory, where controlled and precisely measured plasma conditions can be attained. To this end, we are capitalizing on a three-way synergistic relationship that links astrophysical observations, atomic modeling, and experiments using the LLNL Electron Beam Ion Trap (EBIT). After providing a brief orientation concerning the role of plasma emission models in X-ray astronomy, we discuss one example of this interplay.

Physical Description

7 p.

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OSTI as DE98058785

Other: FDE: PDF; PL:

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  • NASA laboratory space science workshop, Cambridge, MA (United States), 1-3 Apr 1998

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  • Other: DE98058785
  • Report No.: UCRL-JC--131403
  • Report No.: CONF-980439--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 292254
  • Archival Resource Key: ark:/67531/metadc685748

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  • July 1, 1998

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  • July 25, 2015, 2:20 a.m.

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  • April 6, 2017, 6:03 p.m.

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Liedahl, D.A., LLNL. Synergistic approach to modeling X-ray spectra, article, July 1, 1998; California. (digital.library.unt.edu/ark:/67531/metadc685748/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.