title: Raman backscatter as a remote laser power sensor in high-energy-density plasmas.
abstract: Stimulated Raman backscatter is used as a remote sensor to quantify the instantaneous laser power after transfer from outer to inner cones that cross in a National Ignition Facility (NIF) gas-filled hohlraum plasma. By matching stimulated Raman backscatter between a shot reducing outer versus a shot reducing inner power we infer that about half of the incident outer-cone power is transferred to inner cones, for the specific time and wavelength configuration studied. This is the first instantaneous nondisruptive measure of power transfer in an indirect drive NIF experiment using optical measurements.
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA. moody4@llnl.gov
authors.forename: J D
authors.initials: JD
authors.lastname: Moody
authors.forename: D J
authors.initials: DJ
authors.lastname: Strozzi
authors.forename: L
authors.initials: L
authors.lastname: Divol
authors.forename: P
authors.initials: P
authors.lastname: Michel
authors.forename: H F
authors.initials: HF
authors.lastname: Robey
authors.forename: S
authors.initials: S
authors.lastname: LePape
authors.forename: J
authors.initials: J
authors.lastname: Ralph
authors.forename: J S
authors.initials: JS
authors.lastname: Ross
authors.forename: S H
authors.initials: SH
authors.lastname: Glenzer
authors.forename: R K
authors.initials: RK
authors.lastname: Kirkwood
authors.forename: O L
authors.initials: OL
authors.lastname: Landen
authors.forename: B J
authors.initials: BJ
authors.lastname: MacGowan
authors.forename: A
authors.initials: A
authors.lastname: Nikroo
authors.forename: E A
authors.initials: EA
authors.lastname: Williams