Laboratory Astrophysics at the LLNL Electron Beam Ion Traps EBIT-I and EBIT-II

Details Laboratory Astrophysics at the LLNL Electron Beam Ion Traps EBIT-I and EBIT-II Laboratory Astrophysics at the LLNL Electron Beam Ion Traps EBIT-I and EBIT-II

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002nla..work...38b&link_type=abstract

NASA Laboratory Astrophysics Workshop, held May 1-3 2002 at NASA Ames Research Center, Moffett Field, CA 94035-1000. Publisher:

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

In order to provide a complete, accurate set of atomic data for interpreting spectra provided by XMM-Newton, the Chandra X-Ray Observatory, and Astro-E2, and to test the accuracy of spectral modeling packages already in use, we have developed an extensive Laboratory Astrophysics program at the LLNL electron beam ion traps ebit-i and ebit-ii.Over the last decade we have developed the ability to reproduce and isolate the radiative processes that occur in a variety of astrophysical plasmas, such as plasmas in coronal equilibrium found in stellar coronae, ionizing plasmas found in supernova remnants, and recombining plasmas found near accretion sources. In support of this work we have built a suite of spectrometers that measure radiation spanning the 1--7000 Å wavelength band, the most recent addition being the spare NASA/GSFC Astro-E 6x6 microcalorimeter array [1]. An overview of some of the results of our measurements of Fe L-shell line emission will be presented, including excitation cross sections as a function of impact electron energy and contributions from dielectronic recombination [2], absolute excitation cross sections [3], transition wavelengths [4], and relative line intensities measured under non-equilibrium conditions. Work by the University of California, LLNL was performed under Contract No. W-7405-Eng-48 and supported by NASA SARA P.O. No. S-03958G and NASA High Energy Astrophysics X-ray Astronomy Research and Analysis Grant NAGW- 4185.

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