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A recirculating linac-based facility for ultrafast X-ray science

  • Author(s): Corlett, J.N
  • Barletta, W.A.
  • DeSantis, S.
  • Doolittle, L.
  • Fawley, W.M.
  • Green, M.A.
  • Heimann, P.
  • Leone, S.
  • Lidia, S.
  • Li, D.
  • Ratti, A.
  • Robinson, K.
  • Schoenlein, R.
  • Staples, J.
  • Wan, W.
  • Wells, R.
  • Wolski, A.
  • Zholents, A.
  • Placidi, M.
  • Pirkl, W.
  • Parmigiani, F.
  • et al.
Abstract

We present an updated design for a proposed source of ultra-fast synchrotron radiation pulses based on a recirculating superconducting linac, in particular the incorporation of EUV and soft x-ray production. The project has been named LUX - Linac-based Ultrafast X-ray facility. The source produces intense x-ray pulses with duration of 10-100 fs at a 10 kHz repetition rate, with synchronization of 10 s fs, optimized for the study of ultra-fast dynamics. The photon range covers the EUV to hard x-ray spectrum by use of seeded harmonic generation in undulators, and a specialized technique for ultra-short-pulse photon production in the 1-10 keV range. High-brightness rf photocathodes produce electron bunches which are optimized either for coherent emission in free-electron lasers, or to provide a large x/y emittance ration and small vertical emittance which allows for manipulation to produce short-pulse hard x-rays. An injector linac accelerates the beam to 120 MeV, and is followed by four passes through a 600-720 MeV recirculating linac. We outline the major technical components of the proposed facility.

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