Experimental demonstration of enhanced self-amplified spontaneous emission by an optical klystron.
Phys Rev Lett
; 114(1): 013901, 2015 Jan 09.
Article
em En
| MEDLINE
| ID: mdl-25615469
ABSTRACT
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.
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2015
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