Time and frequency domain analysis of superradiant coherent synchrotron radiation in a waveguide free-electron laser

The coherent synchrotron radiation process in a waveguide is theoretically investigated. A single, short bunch propagating through a wiggler is considered. In a waveguide, two very distinct regimes are possible. At grazing, where the beam velocity matches the wave group velocity, the bunch emits a s...

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Bibliographic Details
Published in:Physical review letters 1994-02, Vol.72 (8), p.1192-1195
Main Authors: Gover, A, Hartemann, FV, Le Sage GP, Luhmann, Jr, NC, Zhang, RS, Pellegrini, C
Format: Article
Language:English
Subjects:
426002 - Engineering- Lasers & Masers- (1990-)
BEAM BUNCHING
BEAM DYNAMICS
BREMSSTRAHLUNG
COHERENT RADIATION
DATA
DOPPLER EFFECT
ELECTRIC FIELDS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTROMAGNETS
EMISSION
ENERGY-LEVEL TRANSITIONS
ENGINEERING
FREE ELECTRON LASERS
INFORMATION
LASERS
MAGNETS
NUMERICAL DATA
PHOTON EMISSION
POWER
RADIATIONS
STIMULATED EMISSION
SUPERRADIANCE
SYNCHROTRON RADIATION
THEORETICAL DATA
WAVEGUIDES
WIGGLER MAGNETS
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Summary:The coherent synchrotron radiation process in a waveguide is theoretically investigated. A single, short bunch propagating through a wiggler is considered. In a waveguide, two very distinct regimes are possible. At grazing, where the beam velocity matches the wave group velocity, the bunch emits a single, ultrashort chirped pulse whose duration is determined by the interaction bandwidth and the waveguide dispersion. Away from grazing, where slippage dominates, two distinct pulses are radiated at the Doppler upshifted and downshifted frequencies. Both the time and frequency domain expressions for the radiation characteristics are derived.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.72.1192