title: Subpicosecond bunch train production for a tunable mJ level THz source.
abstract: A strong energy modulation in an electron bunch passing through a dielectric-lined waveguide was recently demonstrated in Antipov et al., Phys. Rev. Lett. 108, 144801 (2012). In this Letter, we demonstrate a successful conversion of this energy modulation into a beam density modulation, and the formation of a series of microbunches with a subpicosecond periodicity by means of magnetic optics (chicane). A strong coherent transition radiation signal produced by the microbunches is obtained and the tunability of its carrier frequency in the 0.68-0.9 THz range by regulating the energy chirp in the incoming electron bunch is demonstrated using infrared interferometry. A tabletop, compact, tunable, and narrowband source of intense THz radiation based on this technology is proposed.
authors.affiliation: Euclid Techlabs LLC, Solon, Ohio 44139, USA and High Energy Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
authors.forename: S
authors.initials: S
authors.lastname: Antipov
authors.forename: M
authors.initials: M
authors.lastname: Babzien
authors.forename: C
authors.initials: C
authors.lastname: Jing
authors.forename: M
authors.initials: M
authors.lastname: Fedurin
authors.forename: W
authors.initials: W
authors.lastname: Gai
authors.forename: A
authors.initials: A
authors.lastname: Kanareykin
authors.forename: K
authors.initials: K
authors.lastname: Kusche
authors.forename: V
authors.initials: V
authors.lastname: Yakimenko
authors.forename: A
authors.initials: A
authors.lastname: Zholents