title: High-gradient millimeter-wave accelerator on a planar dielectric substrate.
abstract: We report the first high-gradient studies of a millimeter-wave accelerator, employing for the first time a planar dielectric accelerator, powered by means of a 0.5-A, 300-MeV, 11.424-GHz drive electron beam, synchronous at the 8th harmonic, 91.392 GHz. Embedded in a ring-resonator circuit within the electron beam line vacuum, this structure was operated at 20 MeV/m, with a circulating power of 200 kW, for 2 x 10(5) pulses, with no sign of breakdown, dielectric charging, or other deleterious high-gradient phenomena. We also present the first measurement of the quadrupolar content of an accelerating mode.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA. marc@physics.harvard.edu
authors.forename: M E
authors.initials: ME
authors.lastname: Hill
authors.forename: C
authors.initials: C
authors.lastname: Adolphsen
authors.forename: W
authors.initials: W
authors.lastname: Baumgartner
authors.forename: R S
authors.initials: RS
authors.lastname: Callin
authors.forename: X E
authors.initials: XE
authors.lastname: Lin
authors.forename: M
authors.initials: M
authors.lastname: Seidel
authors.forename: T
authors.initials: T
authors.lastname: Slaton
authors.forename: D H
authors.initials: DH
authors.lastname: Whittum