APS » Journals » Phys. Rev. ST Accel. Beams » Volume 8 » Issue 3

Phys. Rev. ST Accel. Beams 8, 030702 (2005) [17 pages]

Superradiant and stimulated-superradiant emission in prebunched electron-beam radiators. II. Radiation enhancement schemes
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A. Gover and E. Dyunin
Faculty of Engineering, Department of Physical Electronics, Tel-Aviv University, Tel-Aviv 69978 Israel

Y. Lurie, Y. Pinhasi, and M. V. Krongauz
Faculty of Engineering, Department of Electrical and Electronic Engineering, The College of Judea and Samaria, Ariel 44837 Israel

Received 1 March 2004; published 2 March 2005

Further enhancement of the intense coherent superradiant and stimulated-superradiant emission from prebunched electron beams is possible, in schemes of prebunched beam radiation devices, and particularly free electron laser (FEL). The enhancement of coherent power and spectral power by use of a waveguide, particularly at the zero-slippage condition, is evaluated. A special scheme of a stimulated-superradiance FEL oscillator is analyzed and is shown to feature ultimate radiative energy conversion efficiency (near 100%).


©2005 The American Physical Society

URL: http://link.aps.org/abstract/PRSTAB/v8/e030702
DOI: 10.1103/PhysRevSTAB.8.030702
PACS: 41.60.Cr, 52.59.–f, 42.50.Fx

Supplemental Material

Video 1 [ GIF (8046 kB) | MPEG (3694 kB) | AVI (292 kB) | QuickTime (4884 kB) ]
Thumbnail of Video 1Dynamics of oscillation buildup in a stimulated-superradiant FEL oscillator in a single stable point operating regime (θ¯0 = - 5.5 < -2π). a) The growth of K¯s  ∝  P1/4 (P is the circulating power) with time up to stable saturation. b) K¯s as a function of the resonator circulation round-trip number. c) Evolution of the separatrix (the "trap") and the tight electron bunch trajectory as a function of time ending with trapping near the bottom of the trap.
Video 2 [ QuickTime (5007 kB) | GIF (7597 kB) | AVI (180 kB) | MPEG (4245 kB) ]
Thumbnail of Video 2Dynamics of oscillation buildup in the bistable operating regime: Starting from low power for θ¯0 = -8, the oscillator saturates at the first (low) stable saturation point. The bunch trajectories are open all along, and end-up at saturation out of the traps beyond the second maximum. a) The growth of K¯s  ∝  P1/4 (P is the circulating power) with time up to stable saturation. b) K¯s as a function of the resonator circulation round-trip number. c) Evolution of the separatrix (the "trap") and the tight electron bunch trajectory as a function of time ending up without trapping.
Video 3 [ QuickTime (4848 kB) | GIF (7724 kB) | AVI (224 kB) | MPEG (4245 kB) ]
Thumbnail of Video 3Dynamics of oscillator stored power decay in the bistable operating regime. Starting from a power level slightly below the unstable equilibrium point, the oscillator power decays and it ends u at the low stable saturation point. a) The growth of  K¯s  ∝  P1/4 (P is the circulating power) with time up to stable saturation. b) K¯s as a function of the resonator circulation round-trip number. c) Evolution of the separatrix (the "trap") and the tight electron bunch trajectory as a function of time ending up without trapping.
Video 4 [ MPEG (7386 kB) | QuickTime (5278 kB) | GIF (6663 kB) | AVI (178 kB) ]
Thumbnail of Video 4Dynamics of oscillator buildup in the bistable operating regime. Starting from a power level slightly above the unstable equilibrium point, the oscillator power grows and it ends up at the high stable saturation point. a) The growth of  K¯s  ∝  P1/4 (P is the circulating power) with time up to stable saturation. b) K¯s as a function of the resonator circulation round-trip number. c) Evolution of the separatrix (the "trap") and the tight electron bunch trajectory as a function of time ending with trapping near the bottom of the trap.

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