title: Intense high-energy proton beams from Petawatt-laser irradiation of solids.
abstract: An intense collimated beam of high-energy protons is emitted normal to the rear surface of thin solid targets irradiated at 1 PW power and peak intensity 3x10(20) W cm(-2). Up to 48 J ( 12%) of the laser energy is transferred to 2x10(13) protons of energy >10 MeV. The energy spectrum exhibits a sharp high-energy cutoff as high as 58 MeV on the axis of the beam which decreases in energy with increasing off axis angle. Proton induced nuclear processes have been observed and used to characterize the beam.
authors.affiliation: Lawrence Livermore National Laboratory, University of California, P. O. Box 808, Livermore, California 94550, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Snavely
authors.forename: M H
authors.initials: MH
authors.lastname: Key
authors.forename: S P
authors.initials: SP
authors.lastname: Hatchett
authors.forename: T E
authors.initials: TE
authors.lastname: Cowan
authors.forename: M
authors.initials: M
authors.lastname: Roth
authors.forename: T W
authors.initials: TW
authors.lastname: Phillips
authors.forename: M A
authors.initials: MA
authors.lastname: Stoyer
authors.forename: E A
authors.initials: EA
authors.lastname: Henry
authors.forename: T C
authors.initials: TC
authors.lastname: Sangster
authors.forename: M S
authors.initials: MS
authors.lastname: Singh
authors.forename: S C
authors.initials: SC
authors.lastname: Wilks
authors.forename: A
authors.initials: A
authors.lastname: MacKinnon
authors.forename: A
authors.initials: A
authors.lastname: Offenberger
authors.forename: D M
authors.initials: DM
authors.lastname: Pennington
authors.forename: K
authors.initials: K
authors.lastname: Yasuike
authors.forename: A B
authors.initials: AB
authors.lastname: Langdon
authors.forename: B F
authors.initials: BF
authors.lastname: Lasinski
authors.forename: J
authors.initials: J
authors.lastname: Johnson
authors.forename: M D
authors.initials: MD
authors.lastname: Perry
authors.forename: E M
authors.initials: EM
authors.lastname: Campbell