Author/Authors :
Doyuran، نويسنده , , Adnan and DiMauro، نويسنده , , Louis and Graves، نويسنده , , W and Heese، نويسنده , , Richard and Johnson، نويسنده , , Erik D and Krinsky، نويسنده , , Sam and Loos، نويسنده , , Henrik and Murphy، نويسنده , , James B and Rakowsky، نويسنده , , George and Rose، نويسنده , , James and Shaftan، نويسنده , , Timur and Sheehy، نويسنده , , Brian and Shen، نويسنده , , Yuzhen and Skaritka، نويسنده , , John and Wang، نويسنده , , Xijie and Wu، نويسنده , , Zilu and Yu، نويسنده , , Li Hua، نويسنده ,
Abstract :
The DUV-FEL facility has been in operation in the High Gain Harmonic Generation (HGHG) mode producing a 266-nm output from 177-MeV electrons for 1 year. In this paper, we present preliminary results of the Chirped Pulse Amplification (CPA) of the HGHG radiation. In the normal HGHG process, a 1-ps electron beam is seeded by a chirped 9 ps long, 800-nm Ti:Sapphire laser. The electron beam sees only a narrow fraction of the seed laser bandwidth. However, in the CPA case, the seed laser pulse length is reduced to 1 ps, and the electron beam sees the full bandwidth. We introduce an energy chirp on the electron beam to match the chirp of the seed pulse, enabling the resonant condition for the whole beam. We present measurements of the spectrum bandwidth for various chirp conditions.
Keywords :
CPA , FEL , HGHG , Seed laser , Accelerator , High gain
