Expansion velocities of laser-produced plasmas determined from extreme ultraviolet spectral line profiles

Journal Article · Tue Nov 01 00:00:00 EST 1977 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.89782· OSTI ID:7213804

Feldman, U; Doschek, G A; Behring, W E; Cohen, L

The expansion of laser-produced plasma is determined from the shapes of spectral lines of highly ionized iron emitted in the extreme ultraviolet. The plasmas were produced by focusing the pulse from a Nd : glass laser onto solid planar targets, and spectra were recorded with a high-resolution grazing incidence spectrograph. From the Doppler broadening of lines of Fe XX and Fe XXI, expansion velocities of approx.830 km s/sup -1/ were determined. The relative time-averaged ion abundances of Fe XVIII, Fe XIX, Fe XX, and Fe XXI are estimated for three different spectra. The abundances do not differ by more than a factor of 4 for any of the spectra.

• Research Organization: E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, D. C. 20375
• OSTI ID: 7213804
• Journal Information: Appl. Phys. Lett.; (United States), Vol. 31:9
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LASER-PRODUCED PLASMA
PLASMA EXPANSION
ABUNDANCE
DOPPLER BROADENING
EMISSION SPECTRA
ION TEMPERATURE
IRON IONS
PLASMA DIAGNOSTICS
ULTRAVIOLET SPECTRA
ATOMIC IONS
CHARGED PARTICLES
EXPANSION
IONS
LINE BROADENING
PLASMA
SPECTRA
700102* - Fusion Energy- Plasma Research- Diagnostics