"Exact" classical electron dynamic approach for a free-electron laser amplifier

Louisell, W. H.; Lam, Juan F.; Copeland, Drew A.; Colson, W.B.

doi:10.1103/physreva.19.288

Cited by 61 publications

(14 citation statements)

References 13 publications

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“…(2) and (30) are not valid. In this article we describe the electron dynamics in the combined wiggler and radiation wave fields (the ponderomotive wave) in terms of the pendulum model [35],…”

Section: Stimulated Superradiance In Electron-beam Radiatorsmentioning

confidence: 99%

Superradiant and stimulated-superradiant emission in prebunched electron-beam radiators. II. Radiation enhancement schemes

Gover

Dyunin

Lurie

et al. 2005

Phys. Rev. ST Accel. Beams

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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%). A. GOVER et al. Phys. Rev. ST Accel. Beams 8, 030702 (2005) 030702-2 A. GOVER et al. Phys. Rev. ST Accel. Beams 8, 030702 (2005) 030702-4

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Section: Stimulated Superradiance In Electron-beam Radiatorsmentioning

confidence: 99%

Superradiant and stimulated-superradiant emission in prebunched electron-beam radiators. II. Radiation enhancement schemes

Gover

Dyunin

Lurie

et al. 2005

Phys. Rev. ST Accel. Beams

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“…The expansion of the beam radius along the propagation direction k is expressed by [18] w2(z)=w0'[1 +(2gz/ztwo) 2 ], (5) where w o is the minimum radius at the beam waist and As is the wavelength of the radiation . For a stable resonator with two mirrors of radius of curvature R and separated by a distance d, the minimum beam waist is estimated as…”

Section: Output Power and Output Wavelengthmentioning

confidence: 99%

“…For the last ten years, tremendous theoretical efforts have been concentrated on understanding the classical gain mechanism of the free-electron-laser amplifier [3][4][5][6][7][8][9][10], yet very little investigation has been devoted to the theoretical implications of the free-electronlaser oscillator [10][11][12][13][14][15] . In this paper, a theory is presented to account for the experimental results observed in the steady state of the Stanford free-electron-laser (FEL) oscillator which consists of a 43 MeV electron beam, a helical periodic magnet of period 3 .…”

Section: Introductionmentioning

confidence: 99%

On the Theory of a Free-electron-laser Oscillator

Chan

Tsui

1987

Journal of Modern Optics

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“…In pioneering works [5][6][7][8][9] analytical investigations of stationary regimes of microwave amplification and generation in a hybrid FEM were carried out; later these results were refined mainly through numerical simulations. Experimentalists [10][11][12][13] reported a considerable loss of electron beam current and microwave power for a hybrid FEM for a certain range of values of the guide magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Hybrid planar free-electron maser in the magnetoresonance regime

Goryashko

Ilyenko

Opanasenko

2009

Phys. Rev. ST Accel. Beams

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We study the operation regime of a hybrid planar free-electron maser (FEM) amplifier near the magnetoresonant value of the uniform longitudinal (guide) magnetic field. Using analytical expressions for individual test electron trajectories and normal frequencies of their three-dimensional oscillations in the magnetostatic field of the hybrid planar FEM, an analytical condition of chaotization of motion is established and shown to be given by the Chirikov resonance-overlap criterion applied to the normal undulator and cyclotron frequencies with respect to the coupling induced by the undulator magnetic field. It is also shown analytically that, in spite of the well-known drop for the exact magnetoresonance, the gain attains its maximal value in the zone of regular dynamics slightly above the magnetoresonant value of the guide magnetic field. Under the condition of undulator resonance, it is practically independent of the amplitude of the undulator magnetic field and the wavelength of amplified signal. To account for spacecharge effects, we propose a theoretical model of a weakly relativistic FEM, which accommodates not only potential but also rotational parts of the nonradiated electromagnetic field of a moving charged particle. It turns out that the rotational part of nonradiated field diminishes the defocusing influence of the potential part on the beam bunching. Numeric simulation of the nonlinear stage of amplification is fulfilled, taking into consideration adiabatic entrance of the electron beam to the interaction region and initial electron velocity spread. We find that nonradiated field and initial electron velocity spread do not influence essentially the efficiency of hybrid planar FEM amplification if parameters of the beammicrowave interaction correspond to the operational regime in the zone of regular dynamics near the magnetoresonance.

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"Exact" classical electron dynamic approach for a free-electron laser amplifier

Cited by 61 publications

References 13 publications

Superradiant and stimulated-superradiant emission in prebunched electron-beam radiators. II. Radiation enhancement schemes

Superradiant and stimulated-superradiant emission in prebunched electron-beam radiators. II. Radiation enhancement schemes

On the Theory of a Free-electron-laser Oscillator

Hybrid planar free-electron maser in the magnetoresonance regime

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