title: Energy increase in multi-MeV ion acceleration in the interaction of a short pulse laser with a cluster-gas target.
abstract: An approach for accelerating ions, with the use of a cluster-gas target and an ultrashort pulse laser of 150-mJ energy and 40-fs duration, is presented. Ions with energy 10-20 MeV per nucleon having a small divergence (full angle) of 3.4 degrees are generated in the forward direction, corresponding to approximately tenfold increase in the ion energies compared to previous experiments using solid targets. It is inferred from a particle-in-cell simulation that the high energy ions are generated at the rear side of the target due to the formation of a strong dipole vortex structure in subcritical density plasmas.
authors.affiliation: Kansai Photon Science Institute and Photo-Medical Research Center, JAEA, Kyoto, 615-0215 Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Fukuda
authors.forename: A Ya
authors.initials: AY
authors.lastname: Faenov
authors.forename: M
authors.initials: M
authors.lastname: Tampo
authors.forename: T A
authors.initials: TA
authors.lastname: Pikuz
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
authors.forename: M
authors.initials: M
authors.lastname: Kando
authors.forename: Y
authors.initials: Y
authors.lastname: Hayashi
authors.forename: A
authors.initials: A
authors.lastname: Yogo
authors.forename: H
authors.initials: H
authors.lastname: Sakaki
authors.forename: T
authors.initials: T
authors.lastname: Kameshima
authors.forename: A S
authors.initials: AS
authors.lastname: Pirozhkov
authors.forename: K
authors.initials: K
authors.lastname: Ogura
authors.forename: M
authors.initials: M
authors.lastname: Mori
authors.forename: T Zh
authors.initials: TZh
authors.lastname: Esirkepov
authors.forename: J
authors.initials: J
authors.lastname: Koga
authors.forename: A S
authors.initials: AS
authors.lastname: Boldarev
authors.forename: V A
authors.initials: VA
authors.lastname: Gasilov
authors.forename: A I
authors.initials: AI
authors.lastname: Magunov
authors.forename: T
authors.initials: T
authors.lastname: Yamauchi
authors.forename: R
authors.initials: R
authors.lastname: Kodama
authors.forename: P R
authors.initials: PR
authors.lastname: Bolton
authors.forename: Y
authors.initials: Y
authors.lastname: Kato
authors.forename: T
authors.initials: T
authors.lastname: Tajima
authors.forename: H
authors.initials: H
authors.lastname: Daido
authors.forename: S V
authors.initials: SV
authors.lastname: Bulanov