Figure 3
Spectrum of the optical klystron output. The monochromator resolution is 1 nm. The beam current was 0.85 mA bunch−1. The spectrum was measured at the place of optical mixing with the same monochromator as used there. The angle divergence of the output beam is 1.25 mrad in the horizontal plane and 0.5 mrad in the vertical plane. The periodical structure is due to the interference in successive superposition of radiation from the electrons passing through the undulator. The total average power is typically 1 mW. |