title: Proposal for a pulse-compression scheme in x-ray free-electron lasers to generate a multiterawatt, attosecond x-ray pulse.
abstract: A novel scheme to compress the radiation pulse in x-ray free electron lasers is proposed not only to shorten the pulse length but also to enhance the peak power of the radiation, by inducing a periodic current enhancement with an optical laser and applying a temporal shift between the optical and electron beams. Calculations show that a 10-keV x-ray pulse with a peak power of 5 TW and a pulse length of 50 asec can be generated by applying this scheme to an existing x-ray free electron laser facility.
authors.affiliation: RIKEN SPring-8 Center, Koto 1-1-1, Sayo, Hyogo 679-5148, Japan. ztanaka@spring8.or.jp
authors.forename: Takashi
authors.initials: T
authors.lastname: Tanaka