title: Experimental demonstration of femtosecond two-color x-ray free-electron lasers.
abstract: With an eye toward extending optical wave-mixing techniques to the x-ray regime, we present the first experimental demonstration of a two-color x-ray free-electron laser at the Linac Coherent Light Source. We combine the emittance-spoiler technique with a magnetic chicane in the undulator section to control the pulse duration and relative delay between two intense x-ray pulses and we use differently tuned canted pole undulators such that the two pulses have different wavelengths as well. Two schemes are shown to produce two-color soft x-ray pulses with a wavelength separation up to ∼1.9% and a controllable relative delay up to 40 fs.
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
authors.forename: A A
authors.initials: AA
authors.lastname: Lutman
authors.forename: R
authors.initials: R
authors.lastname: Coffee
authors.forename: Y
authors.initials: Y
authors.lastname: Ding
authors.forename: Z
authors.initials: Z
authors.lastname: Huang
authors.forename: J
authors.initials: J
authors.lastname: Krzywinski
authors.forename: T
authors.initials: T
authors.lastname: Maxwell
authors.forename: M
authors.initials: M
authors.lastname: Messerschmidt
authors.forename: H-D
authors.initials: HD
authors.lastname: Nuhn