title: Planar-dielectric-wakefield accelerator structure using Bragg-reflector boundaries.
abstract: We report experimental measurements of narrow-band, single-mode excitation, and drive beam energy modulation, in a dielectric wakefield accelerating structure with planar geometry and Bragg-reflector boundaries. A short, relativistic electron beam (∼1  ps) with moderate charge (∼100  pC) is used to drive the wakefields in the structure. The fundamental mode of the structure is reinforced by constructive interference in the alternating dielectric layers at the boundary, and is characterized by the spectral analysis of the emitted coherent Cherenkov radiation signal. Data analysis shows a narrow-band peak at 210 GHz corresponding to the fundamental mode of the structure. Simulations in both 2D and 3D provide insight into the propagating fields and reproduction of the electron beams dynamics observables and emitted radiation characteristics.
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: G
authors.initials: G
authors.lastname: Andonian
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: O
authors.initials: O
authors.lastname: Williams
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: S
authors.initials: S
authors.lastname: Barber
authors.affiliation: University of Colorado at Boulder, Center for Integrated Plasma Studies, Boulder, Colorado 80309, USA and RadiaSoft LLC, Boulder, Colorado 80304, USA.
authors.forename: D
authors.initials: D
authors.lastname: Bruhwiler
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: P
authors.initials: P
authors.lastname: Favier
authors.affiliation: Accelerator Test Facility, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: M
authors.initials: M
authors.lastname: Fedurin
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: K
authors.initials: K
authors.lastname: Fitzmorris
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: A
authors.initials: A
authors.lastname: Fukasawa
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: P
authors.initials: P
authors.lastname: Hoang
authors.affiliation: Accelerator Test Facility, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: K
authors.initials: K
authors.lastname: Kusche
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: B
authors.initials: B
authors.lastname: Naranjo
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: B
authors.initials: B
authors.lastname: O'Shea
authors.affiliation: Tech-X Corporation, Boulder, Colorado 80303, USA.
authors.forename: P
authors.initials: P
authors.lastname: Stoltz
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, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: A
authors.initials: A
authors.lastname: Valloni
authors.affiliation: Department of Physics and Astronomy, University of California at Los Angeles (UCLA), Los Angeles, California 90095, USA.
authors.forename: J B
authors.initials: JB
authors.lastname: Rosenzweig