Journal
APPLIED PHYSICS LETTERS
Volume 107, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4935429
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Funding
- Department of Energy [DE-AC02-76SF00515]
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Generation of femtosecond to sub-femtosecond pulses is attracting much attention in X-ray free-electron laser user community. One method is to use a slotted, emittance-spoiling foil which was proposed before (P. Emma et al., Phys. Rev. Lett. 92, 074801 (2004)) and has been widely used at the Linac Coherent Light Source. Direct experimental characterization of the slotted-foil performance was previously unfeasible due to a lack of appropriate diagnostics. With a recently installed X-band radio-frequency transverse deflector, we are able to characterize the electron bunch spoiling effect and X-ray pulse when using the slotted foil. We show that few-femtosecond X-ray pulses are generated with flexible control of the single-pulse duration or double-pulse separation with comparison to the theoretical model. (C) 2015 AIP Publishing LLC.
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