Superradiance and nonlinear evolution of a FEL pulse in a single-pass FEL were experimentally demonstrated at the National Synchrotron Light Source (NSLS) Source Development Laboratory (SDL). The experiment was performed using a 1.5 ps high-brightness electron beam and a 100fs Ti: Sapphire seed laser. The seed laser and electron beam interact in the 10 meter long NISUS undulator with a period of 3.89 cm. The FEL spectrum, energy and pulse length along the undulator were measured. FEL saturation was observed, and gain of more the 200 (relative to seed laser) was measured. Both FEL spectrum widening and pulse length shortening were observed; FEL pulses as short as 65 fs FWHM were measured. The superrandiance and nonlinear evolution were also simulated using the numerical code GENESIS1.3 yielding good agreement with the experimental results.
|Publication status||Published - 2005|
|Event||27th International Free Electron Laser Conference, FEL 2005 - , United States|
Duration: 1 Jan 2005 → …
|Conference||27th International Free Electron Laser Conference, FEL 2005|
|Period||1/1/05 → …|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Watanabe, T., Liu, D., Murphy, J. B., Rose, J., Shaftan, T., Tsang, T., ... Reiche, S. (2005). An experimental test of superradiance in a single pass seeded FEL. Paper presented at 27th International Free Electron Laser Conference, FEL 2005, United States.