Coherent radiation from a relativistic electron beam in a longitudinal, periodic magnetic field
- 15 November 1981
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 39 (10) , 845-847
- https://doi.org/10.1063/1.92580
Abstract
The longitudinal wiggler, beam interaction is a novel source of submillimeter wave radiation. It comprises a relativistic electron beam gyrating in a longitudinally rippled, periodic magnetic field of the form B = ẑ[B0+B1 sin(k0 z)], where k0 = 2π/l and l is the period. Axial and transverse electron density bunching gives rise to a convectively unstable wave that propagates along the guiding magnetic field ẑB0. Its growth rate has been computed for the case of a cold beam.Keywords
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