title: Generation of Ramped Current Profiles in Relativistic Electron Beams Using Wakefields in Dielectric Structures.
abstract: Temporal pulse tailoring of charged-particle beams is essential to optimize efficiency in collinear wakefield acceleration schemes. In this Letter, we demonstrate a novel phase space manipulation method that employs a beam wakefield interaction in a dielectric structure, followed by bunch compression in a permanent magnet chicane, to longitudinally tailor the pulse shape of an electron beam. This compact, passive, approach was used to generate a nearly linearly ramped current profile in a relativistic electron beam experiment carried out at the Brookhaven National Laboratory Accelerator Test Facility. Here, we report on these experimental results including beam and wakefield diagnostics and pulse profile reconstruction techniques.
authors.affiliation: Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA.|RadiaBeam Technologies, Santa Monica, California 90404, USA.
authors.forename: G
authors.initials: G
authors.lastname: Andonian
authors.affiliation: Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA.
authors.forename: S
authors.initials: S
authors.lastname: Barber
authors.affiliation: RadiaBeam Technologies, Santa Monica, California 90404, USA.
authors.forename: F H
authors.initials: FH
authors.lastname: O'Shea
authors.affiliation: Accelerator Test Facility, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: M
authors.initials: M
authors.lastname: Fedurin
authors.affiliation: Accelerator Test Facility, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: K
authors.initials: K
authors.lastname: Kusche
authors.affiliation: Accelerator Test Facility, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: C
authors.initials: C
authors.lastname: Swinson
authors.affiliation: Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA.
authors.forename: J B
authors.initials: JB
authors.lastname: Rosenzweig