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Proceedings Paper

From incoherent to coherent x-rays with ICS sources
Author(s): Emilio A. Nanni; William S. Graves; David E. Moncton
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Paper Abstract

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 5×1011 photons/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.

Paper Details

Date Published: 26 August 2015
PDF: 8 pages
Proc. SPIE 9590, Advances in Laboratory-based X-Ray Sources, Optics, and Applications IV, 959006 (26 August 2015); doi: 10.1117/12.2196891
Show Author Affiliations
Emilio A. Nanni, Massachusetts Institute of Technology (United States)
SLAC National Accelerator Lab. (United States)
William S. Graves, Massachusetts Institute of Technology (United States)
The Arizona State Univ. (United States)
David E. Moncton, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 9590:
Advances in Laboratory-based X-Ray Sources, Optics, and Applications IV
Ali M. Khounsary; Carolyn A. MacDonald, Editor(s)

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