نتایج جستجو برای: ultrashort pulse laser
تعداد نتایج: 262882 فیلتر نتایج به سال:
In this Letter we report on the use of ultrashort infrared laser pulses to generate a copious amount of electrons by a copper cathode in an rf photoinjector. The charge yield verifies the generalized Fowler-Dubridge theory for multiphoton photoemission. The emission is verified to be prompt using a two pulse autocorrelation technique. The thermal emittance associated with the excess kinetic ene...
We report results on the development of laser-induced periodic surface structures produced by ultrashort laser pulses irradiating metallic surfaces. The surface topology features are discussed in terms of periodicity and amplitude contrast of the pattern formation, and in relation to the chronological sequence of laser-induced events. Resonant excitation of Surface Plasmons in metallic gratings...
We demonstrate how a steady-state train of ultrashort radiation pulses can be produced utilizing a new free-electron laser ~FEL! configuration, the injection-locked regenerative klystron amplifier ~IRKA!. This configuration consists of two elements: ~1! a prebuncher, which microbunches the electron beams at the desired output wavelength, and ~2! a multipass FEL operated at a very small cavity d...
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