title: Detailed characterization of the LLNL imaging proton spectrometer.
abstract: Ultra-intense short pulse lasers incident on solid targets (e.g., thin Au foils) produce well collimated, broad-spectrum proton beams. These proton beams can be used to characterize magnetic fields, electric fields, and density gradients in high energy-density systems. The LLNL-Imaging Proton Spectrometer (L-IPS) was designed and built [H. Chen et al., Rev. Sci. Instrum. 81, 10D314 (2010)] for use with such laser produced proton beams. The L-IPS has an energy range of 50 keV-40 MeV with a resolving power (E/dE) of about 275 at 1 MeV and 21 at 20 MeV, as well as a single spatial imaging axis. In order to better characterize the dispersion and imaging capability of this diagnostic, a 3D finite element analysis solver is used to calculate the magnetic field of the L-IPS. Particle trajectories are then obtained via numerical integration to determine the dispersion relation of the L-IPS in both energy and angular space.
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.
authors.forename: A M
authors.initials: AM
authors.lastname: Rasmus
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: A U
authors.initials: AU
authors.lastname: Hazi
authors.affiliation: University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: M J-E
authors.initials: MJ
authors.lastname: Manuel
authors.affiliation: University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: C C
authors.initials: CC
authors.lastname: Kuranz
authors.affiliation: University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Klein
authors.affiliation: University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: P X
authors.initials: PX
authors.lastname: Belancourt
authors.affiliation: University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: J R
authors.initials: JR
authors.lastname: Fein
authors.affiliation: University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: MacDonald
authors.affiliation: University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: R P
authors.initials: RP
authors.lastname: Drake
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: B B
authors.initials: BB
authors.lastname: Pollock
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: J
authors.initials: J
authors.lastname: Park
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: G J
authors.initials: GJ
authors.lastname: Williams
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: H
authors.initials: H
authors.lastname: Chen