Intense Super-radiant X-rays from a Compact Source using a Nanocathode Array and Emittance Exchange

Abstract

A novel method of producing intense short wavelength radiation from relativistic electrons is described. The electrons are periodically bunched at the wavelength of interest enabling in-phase super-radiant emission that is orders of magnitude more intense than that of unbunched electrons. The periodic bunching is achieved in steps beginning with an array of beamlets emitted from a nanoengineered field emission array. The beamlets are then manipulated and converted to a longitudinal density modulation via a transverse to longitudinal emittance exchange. Periodic bunching at short wavelength is shown to be possible, and the partially coherent x-ray properties produced by Inverse Compton scattering from an intense laser are estimated for an example at 13 nm wavelength using a 1.5 MeV electron beam.

4 pages, 4 figures, submitted to Phys Rev Lett

References in corpus (2)

• Tunable subpicosecond electron bunch train generation using a transverse-to-longitudinal phase space exchange technique
• A simple method for the determination of the structure of ultrashort relativistic electron bunches

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