From incoherent to coherent X-rays with ICS sources

Emilio A. Nanni, William Graves, David E. Moncton

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

1 Scopus citations


We present the design and performance parameters for a compact X-ray light source (CXLS), which is presently under construction, based on inverse Compton scattering (ICS) of a high brightness electron bunch on a picosecond laser pulse. The flux and brilliance of this source are orders of magnitude beyond existing laboratory scale sources. The accelerator operates at a repetition rate of 1 kHz with 100 bunches of 100 pC charge, each separated by 5 ns, in each shot. The entire CXLS is a few meters in length and produces hard X-rays tunable over a wide range of photon energies. The scattering laser is a Yb:YAG solid-state amplifier producing 100 mJ pulses at 1030 nm. The laser pulse is frequency-doubled and coupled into a ringdown cavity to match the linac pulse structure. At a photon energy of 12.4 keV, the predicted X-ray flux is 5×1011photons/second in a 5% bandwidth and the brilliance is 2×1012 photons/(secmm2mrad20.1%) with a RMS pulse length of 490 fs. Novel concepts for improving the performance of the CXLS with the generation of relativistic electron beams having current modulation at nanometer scale and below are also discussed. This tunable longitudinal modulation enables the production of coherent hard X-rays with ICS.

Original languageEnglish (US)
Title of host publicationAdvances in Laboratory-Based X-Ray Sources, Optics, and Applications IV
EditorsCarolyn A. MacDonald, Ali M. Khounsary
ISBN (Electronic)9781628417562
StatePublished - Jan 1 2015
EventAdvances in Laboratory-Based X-Ray Sources, Optics, and Applications IV - San Diego, United States
Duration: Aug 10 2015 → …

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherAdvances in Laboratory-Based X-Ray Sources, Optics, and Applications IV
Country/TerritoryUnited States
CitySan Diego
Period8/10/15 → …


  • X-ray
  • free electron laser
  • inverse Compton scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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