Author/Authors :
DiMauro، نويسنده , , L. and Doyuran، نويسنده , , A. and Graves، نويسنده , , W. and Heese، نويسنده , , R. and Johnson، نويسنده , , E.D. and Krinsky، نويسنده , , S. and Loos، نويسنده , , H. and Murphy، نويسنده , , J.B. and Rakowsky، نويسنده , , G. and Rose، نويسنده , , J. and Shaftan، نويسنده , , T. and Sheehy، نويسنده , , B. and Skaritka، نويسنده , , J. and Wang، نويسنده , , X.J and Yu، نويسنده , , L.H.، نويسنده ,
Abstract :
The Deep Ultra-Violet Free Electron Laser (DUVFEL) at the National Synchrotron Light Source consists of a 5 MeV photoinjector, a 200 MeV S-band linear accelerator, a four-magnet chicane compressor and a 10 m wiggler with a 3.9 cm period. The commissioning of the SDL accelerator was completed recently and it is routinely producing a high-quality electron beam with a peak current of ∼400 A and a normalised emittance of 3–4 mm mrad. The first SASE lasing of the DUV FEL has been demonstrated at both 266 and 400 nm. The gain length of the SASE experiments was measured to be 66 cm in both cases and up to 20 nJ per pulse was obtained. A laser seeded FEL at 266 nm is in the very early stages of commissioning and amplification of the laser seed has been observed. The goal of the seeded laser FEL is to saturate the FEL and thereby generate sufficient third harmonic at 89 nm for experimental applications. Here we report the observation and measurements of SASE at 400 and 266 nm and the first results of seeded FEL.
