title: Controlled transport and focusing of laser-accelerated protons with miniature magnetic devices.
abstract: This Letter demonstrates the transporting and focusing of laser-accelerated 14 MeV protons by permanent magnet miniature quadrupole lenses providing field gradients of up to 500 T/m. The approach is highly reproducible and predictable, leading to a focal spot of (286 x 173) microm full width at half maximum 50 cm behind the source. It decouples the relativistic laser-proton acceleration from the beam transport, paving the way to optimize both separately. The collimation and the subsequent energy selection obtained are perfectly applicable for upcoming high-energy, high-repetition rate laser systems.
authors.affiliation: Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstrasse 9, Darmstadt, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Schollmeier
authors.forename: S
authors.initials: S
authors.lastname: Becker
authors.forename: M
authors.initials: M
authors.lastname: Geissel
authors.forename: K A
authors.initials: KA
authors.lastname: Flippo
authors.forename: A
authors.initials: A
authors.lastname: Blazević
authors.forename: S A
authors.initials: SA
authors.lastname: Gaillard
authors.forename: D C
authors.initials: DC
authors.lastname: Gautier
authors.forename: F
authors.initials: F
authors.lastname: Grüner
authors.forename: K
authors.initials: K
authors.lastname: Harres
authors.forename: M
authors.initials: M
authors.lastname: Kimmel
authors.forename: F
authors.initials: F
authors.lastname: Nürnberg
authors.forename: P
authors.initials: P
authors.lastname: Rambo
authors.forename: U
authors.initials: U
authors.lastname: Schramm
authors.forename: J
authors.initials: J
authors.lastname: Schreiber
authors.forename: J
authors.initials: J
authors.lastname: Schütrumpf
authors.forename: J
authors.initials: J
authors.lastname: Schwarz
authors.forename: N A
authors.initials: NA
authors.lastname: Tahir
authors.forename: B
authors.initials: B
authors.lastname: Atherton
authors.forename: D
authors.initials: D
authors.lastname: Habs
authors.forename: B M
authors.initials: BM
authors.lastname: Hegelich
authors.forename: M
authors.initials: M
authors.lastname: Roth