Laboratory calibration of density-dependent lines in the extreme ultraviolet spectral region

Journal Article · Fri May 25 04:00:00 EDT 2012 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4707868· OSTI ID:22004058

Lepson, J K; Beiersdorfer, P; Gu, M F; Desai, P; Bitter, M; Roquemore, L; Reinke, M L ^[1]

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1. Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States)

We have been making spectral measurements in the extreme ultraviolet (EUV) from different laboratory sources in order to investigate the electron density dependence of various astrophysically important emission lines and to test the atomic models underlying the diagnostic line ratios. The measurement are being performed at the Livermore EBIT-I electron beam ion trap, the National Spherical Torus Experiment (NSTX) at Princeton, and the Alcator C-Mod tokamak at the Massachusetts Institute of Technology, which together span an electron density of four orders of magnitude and which allow us to test the various models at high and low density limits. Here we present measurements of Fe XXII and Ar XIV, which include new data from an ultra high resolution ({lambda}/{Delta}{lambda} >4000) spectrometer at the EBIT-I facility. We found good agreement between the measurements and modeling calculations for Fe XXII, but poorer agreement for Ar XIV.

• OSTI ID: 22004058
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1438; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALCATOR DEVICE
ARGON IONS
ASTROPHYSICS
CALIBRATION
ELECTRON BEAMS
ELECTRON DENSITY
EXTREME ULTRAVIOLET RADIATION
IRON IONS
MULTICHARGED IONS
NSTX DEVICE
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA SIMULATION
TRAPS
ULTRAVIOLET SPECTRA