AN EXPERIMENTAL TEST OF SUPERRADIANCE IN A SINGLE PASS SEEDED FEL.

Conference · Sun Aug 21 04:00:00 EDT 2005

OSTI ID:861065

WATANABE, T; LIU, D; MURPHY, J B; ROSE, J; SHAFTAN, T; TSANG, T; WANG, X J; YU, L H

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 superradiance and nonlinear evolution were also simulated using the numerical code GENESIS1.3 yielding good agreement with the experimental results.

• Research Organization: BROOKHAVEN NATIONAL LABORATORY
• Sponsoring Organization: DOE/SC
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 861065
• Report Number(s): BNL--75172-2005-CP; KC0204011
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ELECTRON BEAMS
LASERS
METERS
NSLS
SATURATION
SEEDS
SUPERRADIANCE
WIGGLER MAGNETS