title: Multibeam seeded brillouin sidescatter in inertial confinement fusion experiments.
abstract: We present the first observations of multibeam weakly seeded Brillouin sidescatter in indirect-drive inertial confinement fusion (ICF) experiments. Two seeding mechanisms have been identified and quantified: specular reflections ("glint") from opposite hemisphere beams, and Brillouin backscatter from neighboring beams with a different angle of incidence. Seeded sidescatter can dominate the overall coupling losses, so understanding this process is crucial for proper accounting of energy deposition and drive symmetry. Glint-seeded scattered light could also be used to probe hydrodynamic conditions inside ICF targets.
authors: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors: D
authors: D
authors: Turnbull
authors: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors: P
authors: P
authors: Michel
authors: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors: J E
authors: JE
authors: Ralph
authors: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors: L
authors: L
authors: Divol
authors: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors: J S
authors: JS
authors: Ross
authors: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors: L F
authors: LF
authors: Berzak Hopkins
authors: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors: A L
authors: AL
authors: Kritcher
authors: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors: D E
authors: DE
authors: Hinkel
authors: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors: J D
authors: JD
authors: Moody