Electro-Optical Detection of Coherent Radiation Induced by Relativistic Electron Bunches in the Near and Far Fields
2018
Coherent radiation produced by relativistic charged bunches is nowadays of great interest for useroriented
applications and high-resolution diagnostics. Here we present experimental results obtained by
using a temporal monitor based on the electro-optical sampling that allows us to reveal the features of the
radiation emitted in terahertz range by ultrashort electron bunches moving in proximity to a nonlinear
crystal.We investigate the radiation properties both in near- and far-field conditions by employing electron
beams accelerated by a conventional photoinjector and through laser-plasma interactions. Our results
indicate that the emitted radiation moves collinearly with the beam in one case, while its properties
resemble those of the classical Cherenkov radiation in a second case
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