[ital n]=5 to [ital n]=5 soft-x-ray emission of uranium in a high-temperature low-density tokamak plasma

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.3727· OSTI ID:6946931

Fournier, K B; Finkenthal, M; Lippmann, S; Holmes, C P; Moos, H W ^[1]; Goldstein, W H; Osterheld, A L ^[2]

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1. Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218 (United States)
2. L-Division, Lawrence Livermore National Laboratories, P.O. Box 808, Livermore, California 94550 (United States)

The soft-x-ray uranium emission in the 60--200-A range recorded from a high-temperature ([similar to]1 keV) low-density ([similar to]10[sup 13] cm[sup [minus]3]) tokamak plasma has been analyzed by comparison with theoretical level structure and line-intensity calculations. In an extension of previous work [Finkenthal [ital et] [ital al]., Phys. Rev. A 45, 5846 (1992)], theoretical U XXV, U XXX, U XXXI, and U XXXII [ital n]=5 to [ital n]=5 spectra have been computed for the relevant plasma parameters. Fully relativistic parametric potential computer codes have been used for the [ital ab] [ital initio] atomic-structure calculations, and electron-impact excitation rates have been computed in the distorted-wave approximation. 5[ital s]-5[ital p] spectral lines and quasicontinua of U XXX, U XXXI, and U XXXII are identified in the 165--200-A wavelength band. An unambiguous line identification is hampered by theoretical uncertainties and the blending of emission from adjacent charge states.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6946931
• Journal Information: Physical Review A; (United States), Vol. 50:5; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HOT PLASMA
X-RAY SPECTRA
URANIUM
ELECTRONIC STRUCTURE
AMPLITUDES
CHARGE STATES
CROSS SECTIONS
DISTORTED WAVE THEORY
EMISSION SPECTRA
GROUND STATES
LINE WIDTHS
PLASMA DIAGNOSTICS
POTENTIALS
TOKAMAK DEVICES
ACTINIDES
CLOSED PLASMA DEVICES
ELEMENTS
ENERGY LEVELS
METALS
PLASMA
SPECTRA
THERMONUCLEAR DEVICES
664400* - Experimentally Derived Information on Atomic & Molecular Properties- (1992-)
700320 - Plasma Diagnostic Techniques & Instrumentation- (1992-)