Author/Authors :
Doyuran، نويسنده , , A and Babzien، نويسنده , , M and Shaftan، نويسنده , , T and Biedron، نويسنده , , S.G and Yu، نويسنده , , L.H and Ben-Zvi، نويسنده , , I and DiMauro، نويسنده , , L.F and Graves، نويسنده , , W and Johnson، نويسنده , , E and Krinsky، نويسنده , , S and Malone، نويسنده , , R and Pogorelsky، نويسنده , , I and Skaritka، نويسنده , , J and Rakowsky، نويسنده , , G and Wang، نويسنده , , X.J and Woodle، نويسنده , , M and Yakimenko، نويسنده , , V and Jagger، نويسنده , , J and Sajaev، نويسنده , , V and Vasserman، نويسنده , , I، نويسنده ,
Abstract :
We report on the experimental investigation of high-gain harmonic generation carried out at the Accelerator Test Facility at Brookhaven National Laboratory. A seed CO2 laser at a wavelength of 10.6 μm was used to generate FEL output at a 5.3-μm wavelength. The duration of the output pulse was measured using a second-harmonic intensity autocorrelator, and the coherence length was measured using an interferometer. We also measured the energy distribution of the electron beam after it exited the second undulator, observing behavior consistent with that is expected at saturation. The intensity of the harmonic components of the output at 2.65 and 1.77 μm was determined relative to that of the 5.3-μm fundamental. Finally, using a corrector magnet upstream of the radiator, steering effects on the trajectories of the electron and light beams were studied.
