title: Measurement of the dispersion of thermal ion-acoustic fluctuations in high-temperature laser plasmas using multiple-wavelength Thomson scattering.
abstract: The dispersion of ion-acoustic fluctuations has been measured using a novel technique that employs multiple color Thomson-scattering diagnostics to measure the frequency spectrum for two separate thermal ion-acoustic fluctuations with significantly different wave vectors. The plasma fluctuations are shown to become dispersive with increasing electron temperature. We demonstrate that this technique allows a time resolved local measurement of electron density and temperature in inertial confinement fusion plasmas.
authors.affiliation: L-399, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA. froula1@llnl.gov
authors.forename: D H
authors.initials: DH
authors.lastname: Froula
authors.forename: P
authors.initials: P
authors.lastname: Davis
authors.forename: L
authors.initials: L
authors.lastname: Divol
authors.forename: J S
authors.initials: JS
authors.lastname: Ross
authors.forename: N
authors.initials: N
authors.lastname: Meezan
authors.forename: D
authors.initials: D
authors.lastname: Price
authors.forename: S H
authors.initials: SH
authors.lastname: Glenzer
authors.forename: C
authors.initials: C
authors.lastname: Rousseaux