Intense superradiant x rays from a compact source using a nanocathode array and emittance exchange

W. S. Graves, F. X. Kärtner, D. E. Moncton, P. Piot

Research output: Contribution to journalArticle

74 Scopus citations

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 superradiant emission that is far more intense than from 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. The proposed method increases the efficiency of x-ray production by several orders of magnitude, potentially enabling compact x-ray sources to produce brilliance and flux similar to major synchrotron facilities.

Original languageEnglish (US)
Article number263904
JournalPhysical Review Letters
Volume108
Issue number26
DOIs
StatePublished - Jun 26 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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