Penco G, Allaria E, De Ninno G, Ferrari E, Giannessi L
Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14 - km 163.5 in AREA Science Park, 34149 Basovizza, Trieste, Italy.
Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14 - km 163.5 in AREA Science Park, 34149 Basovizza, Trieste, Italy and Laboratory of Quantum Optics, University of Nova Gorica, 5001 Nova Gorica, Slovenia.
Phys Rev Lett. 2015 Jan 9;114(1):013901. doi: 10.1103/PhysRevLett.114.013901. Epub 2015 Jan 6.
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.
我们报告了由于使用光学速调管而增强自放大自发辐射的首个实验证据。在这种自由电子激光方案中，相对论电子束穿过由一个色散段隔开的两个波荡器。后者将在第一个波荡器中产生的电子束能量调制转换为密度调制，从而提高自由电子激光增益。该实验在的里雅斯特的费米实验室进行。在极紫外波段产生了强大的辐射，其强度比纯自放大自发辐射模式下大几个数量级。已将数据与现有的理论模型进行了比对。
