Čerenkov radiation from periodic electron bunches

Cerenkov radiation is calculated for electron beams which exceed the velocity of radiation in a nondispersive dielectric medium. The electron beam is assumed to be bunched as emitted from a traveling-wave accelerator, and the emission region is assumed to be finite. Predictions include (a) emission...

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Bibliographic Details
Published in:Physical review. A, General physics General physics, 1983-09, Vol.28 (3), p.1531-1538
Main Authors: BUSKIRK, F. R, NEIGHBOURS, J. R
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron and ion emission by liquids and solids
impact phenomena
Exact sciences and technology
Impact phenomena (including electron spectra and sputtering)
Other electron-impact emission phenomena
Physics
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Summary:Cerenkov radiation is calculated for electron beams which exceed the velocity of radiation in a nondispersive dielectric medium. The electron beam is assumed to be bunched as emitted from a traveling-wave accelerator, and the emission region is assumed to be finite. Predictions include (a) emission at harmonics of the bunch rate, (b) coherence of radiation at low frequencies, (c) smearing of the emission angle for finite emission regions, and (d) explicit evaluation of the power spectrum in terms of bunch dimensions. The results apply to microwave emission from fast electrons in air or other dielectrics.
ISSN:0556-2791
DOI:10.1103/PhysRevA.28.1531