On the small-signal theory of stimulated Cherenkov emission in dielectric-lined waveguides

Journal Article · Tue May 15 00:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4714759· OSTI ID:22072353

Fares, Hesham ^[1]

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1. Department of Physics, Faculty of Science, Assiut University, Assiut 71516 (Egypt)

The growth characteristics of a two-dimensional Cherenkov free-electron laser (CFEL) in the small-signal low gain regime are studied for both single-electron and collective models. In the single-electron regime, for a thick enough beam, we prove that the gain of the CFEL can be increased by a factor of 2 than that obtained for an infinitely thin electron beam. Thus, the Cherenkov laser should be considered as a hybrid longitudinal/transverse free-electron laser device in general. In the collective-regime, we demonstrate the damping effects of Coulomb collisions among electrons on the amplification characteristics of a Cherenkov laser.

• OSTI ID: 22072353
• Journal Information: Physics of Plasmas, Vol. 19, Issue 5; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHERENKOV RADIATION
COLLECTIVE MODEL
COLLISIONS
DIELECTRIC MATERIALS
ELECTRON BEAMS
FREE ELECTRON LASERS
SIGNALS
TWO-DIMENSIONAL CALCULATIONS
WAVEGUIDES