Frequency response to an electron energy shift
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In a free electron laser (FEL) oscillator, the optical pulse evolves through mode competition as a result of mirror losses, desynchronism, and amplification by the electron beam. The finite time for this evolution determines the optical response to an electron beam energy change. The ability of the FEL operating frequency to follow modulations in electron energy has been demonstrated experimentally [l-3] and theoretically . Using a self-consistent FEL theory with dimensionless parameters , a longitudinal multimode simulation follows the evolution of the optical pulse over many passes of a FEL oscillator.
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Colson, W.B.; Blau, J.; Armstead, R.L. (2003);High-power, short-wavelength free electron lasers (FELs) can make use of a short-Rayleigh-length (SRL) optical mode in order to reduce the intensity on resonator mirrors. The conventional FEL interaction attempts to optimize ...
Clark, Darwin L. (Monterey, California. Naval Postgraduate School, 1992-03);The continuing development of the free electron laser (FEL) as a powerful and versatile source of coherent radiation steadily drives toward the goal of high efficiency and broad tenability at shorter wavelengths. New ...
Frenzen, Christopher L. (Monterey, California. Naval Postgraduate School, 1993); NPS-MA-93-012The optical field in free electron lasers can sometimes develop sidebands and exhibit very complex behavior. The purpose of this report is to develop a two mode model of the optical field in a free electron laser in which ...