Saturation of Beam-Wave Interaction in an Active medium
نویسنده
چکیده
A relativistic bunch moving in the vicinity of a dielectric slab excites Cerenkov radiation. The spectrum of this radiation depends on the dielectric coefficient, the energy of the bunch and its geometric shape. If the dielectric slab is active and the bunch excites the proper frequency, the wake will be amplified. In the framework of a linear theory we discuss the dependence the spatial growth of the bunch on the geometric and optical parameters of the system. Further using non-linear theory, it is shown that electrons are being accelerated even when the interaction of the wave and the active medium reaches saturation.
منابع مشابه
Saturation of bunch-wave interaction in an active medium.
We determine the set of equations which describe the dynamics of electrons in the presence of a wave propagating in an active medium. Simulation results indicate that, even when virtually all the energy is drained from the medium, electrons remain trapped by the accelerating wave. In spite of saturation, gradients of a few GV/m may become available.
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