Coherent synchrotron radiation in a cylindrical waveguide with a helical wiggler

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870729· OSTI ID:6708756

Hartemann, F V; Le Sage, G P; McDermott, D B; Luhmann, Jr, N C ^[1]

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1. Department of Electrical Engineering, University of California, Los Angeles, California 90024 (United States)

The spectral and temporal radiation characteristics of an axially extended (finite-size), transversally accelerated, charge distribution propagating on fixed helical trajectories through a wiggler are derived both in free-space and in a cylindrical waveguide. If the charge distribution scale length is short compared to the radiation wavelength, the electron bunch essentially behaves as an accelerated point charge, and coherently radiates spontaneous synchrotron radiation. In a waveguide, two very different radiation processes are possible. At grazing, where the axial bunch velocity matches the electromagnetic wave group velocity, the single output radiation pulse is extremely short, and chirped over the full interaction bandwidth; the pulse duration is determined by group velocity dispersion. In the free-space limit, the widths of the Doppler upshifted and downshifted radiation pulses are determined by slippage. At grazing, the radiation power level is considerably higher than that expected from the conventional coherent synchrotron scaling.

• OSTI ID: 6708756
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:5; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
ACCELERATORS
BREMSSTRAHLUNG
CONFIGURATION
CYLINDRICAL CONFIGURATION
DOPPLER EFFECT
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTROMAGNETS
ELECTRONS
ELEMENTARY PARTICLES
EQUIPMENT
FERMIONS
FREE ELECTRON LASERS
LASERS
LEPTONS
LINEAR ACCELERATORS
MAGNETS
RADIATIONS
RADIOWAVE RADIATION
SYNCHROTRON RADIATION
WAVEGUIDES
WIGGLER MAGNETS