19 July 1999 Production of tunable monochromatic x rays by the Vanderbilt free-electron laser
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Abstract
Sustained/long duration X-ray output has been demonstrated emanating from the monochromatic X-ray beamline of the Vanderbilt Free-Electron Laser. Tunable, pulsed monochromatic X-rays ranging in energy from 14 - 18 keV are produced by inverse Compton scattering created by the counter propagation of the FEL e-beam and its own infrared beam. These beams are focused and optimized at an interaction zone between the linac and the wiggler where they are brought into coalignment. The X-rays produced exit the beamline through a beryllium window and are directed onto mosaic crystals which divert the beam to an imaging laboratory on the floor above the vault. The initial application of these X-rays is directed toward human imaging, specifically for the diagnosis of breast diseases including cancer. The characteristics of the X-rays are such that they can be used in standard geometry monochromatic imaging, CT like images of the breast using a rotating mosaic crystal 'optic,' time-of-flight imaging and phase contrast images. Eventual extension to other portions of the body, cell biology and material sciences are already anticipated.
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Frank Edward Carroll, James W. Waters, Robert H. Traeger, Marcus H. Mendenhall, Weiwei Clark, Charles A. Brau, "Production of tunable monochromatic x rays by the Vanderbilt free-electron laser", Proc. SPIE 3614, Free-Electron Laser Challenges II, (19 July 1999); doi: 10.1117/12.352661; https://doi.org/10.1117/12.352661
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