We report the first experimental evidence of enhancement of self-amplified spontaneous emission, due to the use of an optical klystron. In this free-electron laser scheme, a relativistic electron beam passes through two undulators, separated by a dispersive section. The latter converts the electron-beam energy modulation produced in the first undulator in density modulation, thus enhancing the free-electron laser gain. The experiment has been carried out at the FERMI facility in Trieste. Powerful radiation has been produced in the extreme ultraviolet range, with an intensity a few orders of magnitude larger than in pure self-amplified spontaneous emission mode. Data have been benchmarked with an existing theoretical model. © 2015 American Physical Society.
Titolo: | Experimental demonstration of enhanced self-amplified spontaneous emission by an optical klystron |
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Data di pubblicazione: | 2015 |
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Handle: | http://hdl.handle.net/20.500.12079/2118 |
Appare nelle tipologie: | 1.1 Articolo in rivista |