title: Interaction of an Ultrarelativistic Electron Bunch Train with a W-Band Accelerating Structure: High Power and High Gradient.
abstract: Electron beam interaction with high frequency structures (beyond microwave regime) has a great impact on future high energy frontier machines. We report on the generation of multimegawatt pulsed rf power at 91 GHz in a planar metallic accelerating structure driven by an ultrarelativistic electron bunch train. This slow-wave wakefield device can also be used for high gradient acceleration of electrons with a stable rf phase and amplitude which are controlled by manipulation of the bunch train. To achieve precise control of the rf pulse properties, a two-beam wakefield interferometry method was developed in which the rf pulse, due to the interference of the wakefields from the two bunches, was measured as a function of bunch separation. Measurements of the energy change of a trailing electron bunch as a function of the bunch separation confirmed the interferometry method.
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.|Tsinghua University, Beijing, 100084, China.
authors.forename: D
authors.initials: D
authors.lastname: Wang
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.|Euclid Techlabs LLC, Solon, Ohio 44139, USA.
authors.forename: S
authors.initials: S
authors.lastname: Antipov
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.|Euclid Techlabs LLC, Solon, Ohio 44139, USA.
authors.forename: C
authors.initials: C
authors.lastname: Jing
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: J G
authors.initials: JG
authors.lastname: Power
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: M
authors.initials: M
authors.lastname: Conde
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: E
authors.initials: E
authors.lastname: Wisniewski
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: W
authors.initials: W
authors.lastname: Liu
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.|Euclid Techlabs LLC, Solon, Ohio 44139, USA.
authors.forename: J
authors.initials: J
authors.lastname: Qiu
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: G
authors.initials: G
authors.lastname: Ha
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
authors.forename: V
authors.initials: V
authors.lastname: Dolgashev
authors.affiliation: Tsinghua University, Beijing, 100084, China.
authors.forename: C
authors.initials: C
authors.lastname: Tang
authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: W
authors.initials: W
authors.lastname: Gai