Towards zeptosecond-scale pulses from x-ray free electron lasers

D.J. Dunning, N.R. Thompson, B.W.J. McNeil

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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The short wavelength and high peak power of the presentgeneration of free-electron lasers (FELs) opens the possibilityof ultra-short pulses even surpassing the present(tens to hundreds of attoseconds) capabilities of other lightsources - but only if x-ray FELs can be made to generatepulses consisting of just a few optical cycles. For hard xrayoperation (<~0.1nm), this corresponds to durations ofapproximately a single attosecond, and below into the zeptosecondscale. This talk will describe a novel method [1] to generate trains of few-cycle pulses, at GW peak powers,from existing x-ray FEL facilities by using a relativelyshort 'afterburner'. Such pulses would enhance researchopportunity in atomic dynamics and push capability towardsthe investigation of electronic-nuclear and nucleardynamics. The corresponding multi-colour spectral output, with a bandwidth envelope increased by up to two orders of magnitudes over SASE, also has potential applications.
Original languageEnglish
Title of host publicationFEL2013: Proceedings of the 35th International Free-Electron Laser Conference
Number of pages6
Publication statusPublished - 30 Nov 2013
Event35th International Free-Electron Laser Conference, FEL 2013 - New York, NY, United States
Duration: 26 Aug 201330 Aug 2013


Conference35th International Free-Electron Laser Conference, FEL 2013
CountryUnited States
CityNew York, NY


  • free-electron laser
  • light
  • x-ray

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