Experimental demonstration of enhanced self-amplified spontaneous emission by an optical klystron

G. Penco, E. Allaria, G. De Ninno, E. Ferrari, L. Giannessi

Research output: Contribution to journalArticle

15 Citations (Scopus)


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.
Original languageEnglish
Article number013901
Pages (from-to)-
JournalPhysical Review Letters
Issue number1
Publication statusPublished - 6 Jun 2015
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this