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Proceedings Paper

Optical modeling of the Jefferson Laboratory IR demo FEL
Author(s): George R. Neil; Stephen V. Benson; Michelle D. Shinn; Paul C. Davidson; Peter K. Kloeppel
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Paper Abstract

The Thomas Jefferson National Accelerator Facility (formerly known as CEBAF) has embarked on the construction of a 1 kW free-electron laser operating initially at 3 microns that is designed for laser-material interaction experiments and to explore the feasibility of scaling the system in power and wavelength for industrial and Navy defense applications. The accelerator system for this IR demo includes a 10 MeV photocathode-based injector, a 32 MeV CEBAF-style superconducting radio-frequency linac, and single-pass transport which accelerates the beam from injector to wiggler, followed by energy-recovery deceleration to a dump. The electron and optical beam time structure in the design consists of a train of picosecond pulses at 37.425 MHz pulse repetition rate. The initial optical configuration is a conventional near-concentric resonator with transmissive outcoupling. Future upgrades of the system will increase the power and shorten the operating wavelength, and utilize a more advanced resonator system capable of scaling to high powers. The optical system of the laser has been modeled using the GLADR code by using a Beer's-law region to mimic the FEL interaction. Effects such as mirror heating have been calculated and compared with analytical treatments. The magnitude of the distortion for several materials and wavelengths has been estimated. The advantages as well as the limitations of this approach are discussed.

Paper Details

Date Published: 2 May 1997
PDF: 12 pages
Proc. SPIE 2989, Modeling and Simulation of Higher-Power Laser Systems IV, (2 May 1997); doi: 10.1117/12.273666
Show Author Affiliations
George R. Neil, Thomas Jefferson National Accelerator Facility (United States)
Stephen V. Benson, Thomas Jefferson National Accelerator Facility (United States)
Michelle D. Shinn, Thomas Jefferson National Accelerator Facility (United States)
Paul C. Davidson, Thomas Jefferson National Accelerator Facility (United States)
Peter K. Kloeppel, Thomas Jefferson National Accelerator Facility (United States)


Published in SPIE Proceedings Vol. 2989:
Modeling and Simulation of Higher-Power Laser Systems IV
Usamah O. Farrukh; Santanu Basu, Editor(s)

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