We have developed a new type of wiggler based on the edge-focusing wiggler for free electron laser (FEL) and self-amplified spontaneous emission (SASE) in the infrared region at the Institute of Scientific and Industrial Research (ISIR), Osaka University. The strong focusing (SF) scheme is adopted for the new wiggler in order to keep the beam size small along whole the wiggler. The wiggler consists of four FODO cells for double focusing. A gain length and SASE output power for the strong focusing wiggler were numerically estimated using the 1D FEL model and Genesis code. Measuring the electron beam size in the wiggler at different wiggler gaps performed the experimental study on focusing property of the new type wiggler. We are conducting experiments to generate SASE in the infrared region and to measure its characteristics, using the strong focusing wiggler and a high intensity single bunch electron beam. We have measured the wavelength spectrum of SASE in the wavelength region between 220 and 50 μm using a grating monochromator and a Ge:Ga detector. The second harmonic and the third harmonic peaks of SASE were also observed in the spectrum measurement.
|Number of pages||4|
|Publication status||Published - 2006|
|Event||28th International Free Electron Laser Conference, FEL 2006 - Berlin, Germany|
Duration: 2006 Aug 27 → 2006 Sept 1
|Conference||28th International Free Electron Laser Conference, FEL 2006|
|Period||06/8/27 → 06/9/1|