Laboratory Astrophysics at the LLNL Electron Beam Ion Traps EBIT I& EBIT II
In order to provide a complete, accurate set of atomic data for interpreting spectra provided by missions such as XMM-Newton, the Chandra X-Ray Observatory, and Astro-E2, we have harnessed the Lawrence Livermore National Laboratory's electron beam ion traps EBIT-I, EBIT-II, and Super-EBIT for laboratory astrophysics. In support of this work we have developed a number of unique techniques, including the ability to experimentally simulate a Maxwellian distribution of electron energies and measuring low-energy charge exchange cross sections using the ''magnetic trapping mode''. We have also built, and operated a full suite of spectrometers spanning the 1-7000 {angstrom} wavelength band, the most recent, being the NASA/Goddard Space Flight Center's Astro-E 6 x 6 engineering spare microcalorimeter array. Results of our efforts include a complete list of wavelengths of the Fe L-shell transitions, measurements of absolute and relative cross sections for direct, impact, dielectronic, and resonance excitation, and measurements of low energy charge transfer reactions. A brief overview of the LLNL, ebit facility, its capabilities, and some results will be discussed.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15002776
- Report Number(s):
- UCRL-JC-147245; TRN: US0402361
- Resource Relation:
- Conference: NASA Laboratory Astrophysics Workshop, NASA Ames, Moffett Field, CA (US), 05/01/2002--05/03/2002; Other Information: PBD: 18 Jun 2002
- Country of Publication:
- United States
- Language:
- English
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