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Collective Coulomb interaction suppression of noise and of radiative emission in charged particle beams

An effect of current shot-noise suppression at optical-frequencies in a drifting charged-particle-beam and the corresponding process of particles self-ordering are analyzed using an analytic 1D model, and verified by 3D numerical simulations. This self-ordering phenomenon, never yet observed in the lab at optical frequencies, takes place due to longitudinal collective Coulomb interaction, under the condition that the beam parameters are set to excite a single mode Langmuir plasma-wave oscillation [1].