Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5467539 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2017 | 6 Pages |
Abstract
Relativistic electrons propagating through a plasmonic medium such as photo-excited plasma channels with negative permittivities undergo betatron motions, emitting photons at oscillating resonance modes. The similar betatron radiation can be generated in X-ray regimes from electrons transported through optically pumped carbon nanotubes (CNTs). The X-ray radiation condition of 0.5 and 6Â MeV electrons phase-matched with plasmonic waves in CNTs is analyzed with a theoretical model of the CNT dispersion relation. Based on the dispersion analysis, radiation intensities and the brilliance of the coherent X-ray source averaged over the pulse duration are estimated using a typical range of system parameters of conventional electron sources and tabletop femtosecond lasers. The assessment indicates that the average brilliance of the harmonic radiation can reach 1010-1013Â photons/s/mm2/mrad2/0.1%BW with 0.5-6Â MeV electrons and X-ray energy up to a few keV.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Young-Min Shin,