Laboratory astrophysics survey of key x-ray diagnostic lines using a microcalorimeter on an electron beam ion trap

Marco Barbera, Eugene Haller, Silver, Kink, Kink, Herbert W. Schnopper, Brickhouse, Simon Bandler, Takacs, Jeffery Beeman, Gillaspy, Laming, Norman Madden, Barbera, Porto, Landis, Stephen Murray

Risultato della ricerca: Articlepeer review

31 Citazioni (Scopus)

Abstract

Cosmic plasma conditions created in an electron beam ion trap (EBIT) make it possible to simulate the dependencies of key diagnostic X-ray lines on density, temperature, and excitation conditions that exist in astrophysical sources. We used a microcalorimeter for such laboratory astrophysics studies because it has a resolving power ≈1000, quantum efficiency approaching 100%, and a bandwidth that spans the X-ray energies from 0.2 keV to 10 keV. Our microcalorimeter, coupled with an X-ray optic to increase the effective solid angle, provides a significant new capability for laboratory astrophysics measurements. Broadband spectra obtained from the National Institute of Standards and Technology EBIT with an energy resolution approaching that of a Bragg crystal spectrometer are presented for nitrogen, oxygen, neon, argon, and krypton in various stages of ionization. We have compared the measured line intensities to theoretical predictions for an EBIT plasma.
Lingua originaleEnglish
pagine (da-a)495-500
Numero di pagine6
RivistaTHE ASTROPHYSICAL JOURNAL
Volume541
Stato di pubblicazionePublished - 2000

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science

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