title: Diagnosis of high-temperature implosions using low- and high-opacity krypton lines.
abstract: High-temperature laser target implosions can be achieved by using relatively thin-shell targets, and they can be diagnosed by doping the fuel with krypton and measuring K-shell and L-shell lines. Electron temperatures of up to 5 keV at modest compressed densities (~ 1-5 g/cm3) are predicted for such experiments, with ion temperatures peaking above 10 keV at the center. It is found that the profiles of low-opacity (optically thin) lines in the expected density range are dominated by the Doppler broadening and can provide a measurement of the ion temperature if spectrometers of spectral resolution Δλ/λ ≥ 1000 are used. For high-opacity lines, obtained with a higher krypton fill pressure, the measurement of the escape factor can yield the ρR of the compressed fuel. At higher densities, Stark broadening of low-opacity lines becomes important and can provide a density measurement, whereas lines of higher opacity can be used to estimate the extent of mixing.
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299.
authors.forename: B
authors.initials: B
authors.lastname: Yaakobi
authors.forename: R
authors.initials: R
authors.lastname: Epstein
authors.forename: C F
authors.initials: CF
authors.lastname: Hooper
authors.forename: D A
authors.initials: DA
authors.lastname: Haynes
authors.forename: Q
authors.initials: Q
authors.lastname: Su