Physics – Optics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..737..858r&link_type=abstract
ADVANCED ACCELERATOR CONCEPTS: Eleventh Advanced Accelerator Concepts Workshop. AIP Conference Proceedings, Volume 737, pp. 858
Physics
Optics
Free-Electron Lasers, Laser-Driven Acceleration, Beam Focusing And Bending Magnets, Wiggler Magnets, And Quadrupoles
Scientific paper
With recent success in high gradient, high-energy gain IFEL experiments at the UCLA Neptune Laboratory, future experiments are now being contemplated. The Neptune IFEL was designed to use a tightly focused, highly diffracting, near-TW peak power 10 micron laser. This choice of laser focusing, driven by power-handling limitations of the optics near the interaction region, led to design and use of a very complex undulator, and to sensitivity to both laser misalignment and focusing errors. As these effects limited the performance of the IFEL experiment, a next generation experiment at Neptune has been studied which avoids the use of a highly diffractive laser beam through use of a waveguide. We discuss here the choice of low-loss waveguide, guided mode characteristics and likely power limitations. We also examine a preferred undulator design, which is chosen to be helical in order to maximize the acceleration achieved for a given power. With the limitations of these laser and undulator choices in mind, we show the expected performance of the IFEL using 1D simulations. Three-dimensional effects are examined, in the context of use of a solenoid for focusing and acceleration enhancement.
Bodzin N.
Frigola P.
Joshi Chaitanya
Musumeci Pietro
Pellegrini Carla
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