Nanomodulated electron beams via electron diffraction and emittance exchange for coherent x-ray generation
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PhysRevAccelBeams.21.014401.pdf
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Author(s)
Graves, W. S.
Nanni, Emilio Alessandro
Moncton, David E.
Date Issued
January 2018
Journal
Physical Review Accelerators and Beams
Publisher
American Physical Society
Citation
Nanni, E. A., et al. “Nanomodulated Electron Beams via Electron Diffraction and Emittance Exchange for Coherent X-Ray Generation.” Physical Review Accelerators and Beams, vol. 21, no. 1, Jan. 2018. © 2018 American Physical Society
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Final published version
Abstract
We present a new method for generation of relativistic electron beams with current modulation on the nanometer scale and below. The current modulation is produced by diffracting relativistic electrons in single crystal Si, accelerating the diffracted beam and imaging the crystal structure, then transferring the image into the temporal dimension via emittance exchange. The modulation period can be tuned by adjusting electron optics after diffraction. This tunable longitudinal modulation can have a period as short as a few angstroms, enabling production of coherent hard x-rays from a source based on inverse Compton scattering with total accelerator length of approximately ten meters. Electron beam simulations from cathode emission through diffraction, acceleration, and image formation with variable magnification are presented along with estimates of the coherent x-ray output properties.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevAccelBeams.21.014401
