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Title: Generating femtosecond X-ray pulses using an emittance-spoiling foil in free-electron lasers

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.
Authors:
; ; ; ; ; ; ; ; ; ; ; ;  [1] ;  [2] ;  [3]
  1. SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States)
  2. Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg (Germany)
  3. Technische Universität München, James-Franck-Straße 1, 85748 Garching (Germany)
Publication Date:
OSTI Identifier:
22486029
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONTROL; FOILS; FREE ELECTRON LASERS; LIGHT SOURCES; LINEAR ACCELERATORS; PERFORMANCE; PULSES; RADIOWAVE RADIATION; X RADIATION