title: Experimental realization of a new type of crystalline undulator.
abstract: A new scheme of making crystalline undulators was recently proposed and investigated theoretically by Andriy Kostyuk, concluding that a new type of crystalline undulator would be not only viable, but better than the previous scheme. This article describes the first experimental measurement of such a crystalline undulator, produced by using Si(1-x)Ge(x)-graded composition and measured at the Mainzer Microtron facility at beam energies of 600 and 855 MeV. We also present theoretical models developed to compare with the experimental data.
authors.affiliation: Department of Physics and Astronomy, Aarhus University, 8000 Aarhus, Denmark.
authors.forename: Tobias N
authors.initials: TN
authors.lastname: Wistisen
authors.affiliation: Department of Physics and Astronomy, Aarhus University, 8000 Aarhus, Denmark.
authors.forename: Kristoffer K
authors.initials: KK
authors.lastname: Andersen
authors.affiliation: Department of Physics and Astronomy, Aarhus University, 8000 Aarhus, Denmark.
authors.forename: Serdar
authors.initials: S
authors.lastname: Yilmaz
authors.affiliation: Department of Physics and Astronomy, Aarhus University, 8000 Aarhus, Denmark.
authors.forename: Rune
authors.initials: R
authors.lastname: Mikkelsen
authors.affiliation: Department of Physics and Astronomy, Aarhus University, 8000 Aarhus, Denmark.
authors.forename: John Lundsgaard
authors.initials: JL
authors.lastname: Hansen
authors.affiliation: Department of Physics and Astronomy, Aarhus University, 8000 Aarhus, Denmark.
authors.forename: Ulrik I
authors.initials: UI
authors.lastname: Uggerhøj
authors.affiliation: Institut für Kernphysik, Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany.
authors.forename: Werner
authors.initials: W
authors.lastname: Lauth
authors.affiliation: Institut für Kernphysik, Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany.
authors.forename: Hartmut
authors.initials: H
authors.lastname: Backe