Author/Authors :
Frigola، نويسنده , , P and Murokh، نويسنده , , A and Musumeci، نويسنده , , P and Pellegrini، نويسنده , , C and Reiche، نويسنده , , S and Rosenzweig، نويسنده , , J and Tremaine، نويسنده , , A and Babzien، نويسنده , , M and Ben-Zvi، نويسنده , , I and Johnson، نويسنده , , E and Malone، نويسنده , , R and Rakowsky، نويسنده , , G and Skaritka، نويسنده , , J and Wang، نويسنده , , X.J and Van Bibber، نويسنده , , K.A and Bertolini، نويسنده , , L and Hi، نويسنده ,
Abstract :
The Visible to Infrared SASE Amplifier (VISA) FEL is designed to obtain high gain at a radiation wavelength of 800 nm. The FEL uses the high brightness electron beam of the Accelerator Test Facility (ATF), with energy of 72 MeV. VISA uses a novel, 4 m long, strong focusing undulator with a gap of 6 mm and a period of 1.8 cm. To obtain large gain the beam and undulator axis have to be aligned to better than 5 μm. Results from initial measurements on the alignment, gain, and spectrum will be presented and compared to theoretical calculations and simulations.
Keywords :
High gain , FEL , Undulator , SASE
