Erratum: Experimental Characterization of Superradiance in a Single-Pass High-Gain Laser-Seeded Free-Electron Laser Amplifier [Phys. Rev. Lett. 98, 034802 (2007)]

摘要

In the second paragraph, the phrase "in a cooperation length, L_c = λ_r/4πρ [14], where λ_r is the radiation wavelength and ρ is the Pierce parameter [15]" should be removed from the second sentence, so that it should read, "The term superradiance, originally coined by Dicke [13], was used to describe this pulse shortening regime in which the radiated FEL power is proportional to the square of the number of electrons."