title: Temperature determination using Kalpha spectra from M -shell Ti ions.
abstract: The compact multipulse terawatt (COMET) laser facility at LLNL was used to irradiate Al-coated 2-50 microm Ti foils with approximately 10(19) W cm(-2) , 500 fs, 3-6 J laser pulses. Laser-plasma interactions on the front side of the target generate hot electrons with sufficient energy to excite inner-shell electrons in Ti, creating Kalpha emission which has been measured using a focusing spectrometer with spatial resolution aimed at the back surface of the targets. The spatial extent of the emission varies with target thickness. The high spectral resolution (lambda/Deltalambda approximately equal to 3800) is sufficient to measure broadening of the Kalpha emission feature due to the emergence of blueshifted satellites from ionized Ti in a heated region of the target. A self-consistent-field model is used to spectroscopically diagnose thermal electron temperatures up to 40 eV in the strongly coupled Ti plasmas.
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, L-473, Livermore, California 94550, USA.
authors.forename: S B
authors.initials: SB
authors.lastname: Hansen
authors.forename: A Ya
authors.initials: AY
authors.lastname: Faenov
authors.forename: T A
authors.initials: TA
authors.lastname: Pikuz
authors.forename: K B
authors.initials: KB
authors.lastname: Fournier
authors.forename: R
authors.initials: R
authors.lastname: Shepherd
authors.forename: H
authors.initials: H
authors.lastname: Chen
authors.forename: K
authors.initials: K
authors.lastname: Widmann
authors.forename: S C
authors.initials: SC
authors.lastname: Wilks
authors.forename: Y
authors.initials: Y
authors.lastname: Ping
authors.forename: H K
authors.initials: HK
authors.lastname: Chung
authors.forename: A
authors.initials: A
authors.lastname: Niles
authors.forename: J R
authors.initials: JR
authors.lastname: Hunter
authors.forename: G
authors.initials: G
authors.lastname: Dyer
authors.forename: T
authors.initials: T
authors.lastname: Ditmire