title: Multibeam effects on fast-electron generation from two-plasmon-decay instability.
abstract: Experiments with multiple laser beams have been carried out in both spherical and planar geometry to study two-plasmon-decay instability, the predominant source of suprathermal electrons in direct-drive inertial confinement fusion experiments. These electrons are observed using the hard x rays generated through electron-target interactions. The experiments show for the first time that the total overlapped intensity governs the scaling of the suprathermal-electron generation regardless of the number of overlapped beams, in contrast to conventional theories that are based on the single-beam approximation.
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, Rochester, NY 14623-1299, USA.
authors.forename: C
authors.initials: C
authors.lastname: Stoeckl
authors.forename: R E
authors.initials: RE
authors.lastname: Bahr
authors.forename: B
authors.initials: B
authors.lastname: Yaakobi
authors.forename: W
authors.initials: W
authors.lastname: Seka
authors.forename: S P
authors.initials: SP
authors.lastname: Regan
authors.forename: R S
authors.initials: RS
authors.lastname: Craxton
authors.forename: J A
authors.initials: JA
authors.lastname: Delettrez
authors.forename: R W
authors.initials: RW
authors.lastname: Short
authors.forename: J
authors.initials: J
authors.lastname: Myatt
authors.forename: A V
authors.initials: AV
authors.lastname: Maximov
authors.forename: H
authors.initials: H
authors.lastname: Baldis