Gain and Efficiency Enhancement in Free Electron Laser by Means of Modulated Electron Beam

Details Gain and Efficiency Enhancement in Free Electron Laser by Means of Modulated Electron Beam Gain and Efficiency Enhancement in Free Electron Laser by Means of Modulated Electron Beam

2004-10-07

arxiv.org/abs/physics/0410041v1

Physics

Plasma Physics

12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France)

Scientific paper

Beam premodulation on free electron laser (FEL) offers considerable enhancement in gain and efficiency when the phase of the premodulated beam is -pi/2 and the beam is highly modulated implying the maximum beam oscillatory velocity due to wiggler. The growth rate of the FEL instability increases with the modulation index and reaches maximum when the modulation index $\Delta \sim 1.0$.

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