Volume 108, Number 6, December 2014
|Number of page(s)||4|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||09 January 2015|
Gamma-ray free-electron lasers: Quantum fluid model
1 Centro Brasileiro de Pesquisas Físicas - RJ, 22290-180, Brazil
2 Instituto de Física, Universidade Federal Fluminense - Campus da Praia Vermelha, Niterói, RJ, 24210-346, Brazil
3 Instituto de Física, Universidade de São Paulo - São Paulo, SP, 05508-090, Brazil
Received: 28 July 2014
Accepted: 11 December 2014
A quantum fluid model is used to describe the interaction of a nondegenerate cold relativistic electron beam with an intense optical wiggler taking into account the beam space-charge potential and photon recoil effect. A nonlinear set of coupled equations is obtained and solved numerically. The numerical results indicate that intense γ-ray free-electron laser emission, with intensities approaching the Schwinger limit, can be driven by the strong nonlinear space-charge wave, for feasible values of the electron beam parameters. However, the achievement of this regime of extreme intensities depends rather critically on the choice of the detuning and of the signal initial phase at the entrance of the interaction region.
PACS: 52.38.-r – Laser-plasma interactions / 52.35.-g – Waves, oscillations, and instabilities in plasmas and intense beams
© EPLA, 2014
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