title: Experimental Investigation of the Collective Raman Scattering of Multiple Laser Beams in Inhomogeneous Plasmas.
abstract: Experiments have been performed evidencing significant stimulated Raman sidescattering (SRS) at large angles from the density gradient. This was achieved in long scale-length high-temperature plasmas in which two beams couple to the same scattered electromagnetic wave further demonstrating for the first time this multiple-beam collective SRS interaction. The collective nature of the coupling and the amplification at large angles from the density gradient increase the global SRS losses and produce light scattered in novel directions out of the planes of incidence of the beams. These findings obtained in plasmas conditions relevant of inertial confinement fusion experiments similarly apply to the more complex geometry of these experiments where anomalously large levels of SRS were measured.
authors.affiliation: CEA, DAM, DIF, F-91297 Arpajon, France.
authors.forename: S
authors.initials: S
authors.lastname: Depierreux
authors.affiliation: CEA, DAM, DIF, F-91297 Arpajon, France.
authors.forename: C
authors.initials: C
authors.lastname: Neuville
authors.affiliation: LULI, UMR 7605 CNRS, Ecole Polytechnique, 91128 Palaiseau cedex, France.
authors.forename: C
authors.initials: C
authors.lastname: Baccou
authors.affiliation: CEA, DAM, DIF, F-91297 Arpajon, France.
authors.forename: V
authors.initials: V
authors.lastname: Tassin
authors.affiliation: CEA, DAM, DIF, F-91297 Arpajon, France.
authors.forename: M
authors.initials: M
authors.lastname: Casanova
authors.affiliation: CEA, DAM, DIF, F-91297 Arpajon, France.
authors.forename: P-E
authors.initials: PE
authors.lastname: Masson-Laborde
authors.affiliation: P. N. Lebedev Physical Institute, 53 Leninskii Prospect, Moscow 119991 Russia.
authors.forename: N
authors.initials: N
authors.lastname: Borisenko
authors.affiliation: P. N. Lebedev Physical Institute, 53 Leninskii Prospect, Moscow 119991 Russia.
authors.forename: A
authors.initials: A
authors.lastname: Orekhov
authors.affiliation: University of Bordeaux-CNRS-CEA, CELIA, F-33405 Talence cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Colaitis
authors.affiliation: CEA, DAM, DIF, F-91297 Arpajon, France.
authors.forename: A
authors.initials: A
authors.lastname: Debayle
authors.affiliation: University of Bordeaux-CNRS-CEA, CELIA, F-33405 Talence cedex, France.
authors.forename: G
authors.initials: G
authors.lastname: Duchateau
authors.affiliation: Centre de Physique Théorique, CNRS-Ecole Polytechnique, 91128 Palaiseau cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Heron
authors.affiliation: Centre de Physique Théorique, CNRS-Ecole Polytechnique, 91128 Palaiseau cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Huller
authors.affiliation: CEA, DAM, DIF, F-91297 Arpajon, France.
authors.forename: P
authors.initials: P
authors.lastname: Loiseau
authors.affiliation: University of Bordeaux-CNRS-CEA, CELIA, F-33405 Talence cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Nicolaï
authors.affiliation: Centre de Physique Théorique, CNRS-Ecole Polytechnique, 91128 Palaiseau cedex, France.
authors.forename: D
authors.initials: D
authors.lastname: Pesme
authors.affiliation: LULI, UMR 7605 CNRS, Ecole Polytechnique, 91128 Palaiseau cedex, France.
authors.forename: C
authors.initials: C
authors.lastname: Riconda
authors.affiliation: CEA, DAM, DIF, F-91297 Arpajon, France.
authors.forename: G
authors.initials: G
authors.lastname: Tran
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299, USA.
authors.forename: R
authors.initials: R
authors.lastname: Bahr
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299, USA.
authors.forename: J
authors.initials: J
authors.lastname: Katz
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299, USA.
authors.forename: C
authors.initials: C
authors.lastname: Stoeckl
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299, USA.
authors.forename: W
authors.initials: W
authors.lastname: Seka
authors.affiliation: University of Bordeaux-CNRS-CEA, CELIA, F-33405 Talence cedex, France.
authors.forename: V
authors.initials: V
authors.lastname: Tikhonchuk
authors.affiliation: LULI, UMR 7605 CNRS, Ecole Polytechnique, 91128 Palaiseau cedex, France.
authors.forename: C
authors.initials: C
authors.lastname: Labaune