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Proceedings Paper

Issues in high-power FEL design at the Continuous Electron Beam Accelerator Facility
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Paper Abstract

The Continuous Electron Beam Accelerator Facility (CEBAF) is a prime example of the progress that SRF technology has made. CEBAF was designed to operate at 1500 MHz due to the needs of nuclear physics users and the relative maturity of the Cornell cavity design on which it is based. CEBAF will be operational in 1994 and is designed for 4 GeV of energy at 200 microamps of CW average current. The specified emittance (< 1 nm at 1 GeV) and energy spread (< 10-4) are extremely tight although the design peak current is too low to give significant gain in an FEL. The CEBAF cavities have a specified gradient of 5 MeV/m but delivered gradients have been significantly higher, recently exceeding an average of 8.5 MeV/m for approximately 100 production cavities. The CEBAF injector has been operated at energies up to 85 MeV and has met all designs specifications in over 3000 hours of around-the-clock operation. Two FELs utilizing a high charge injector have been designed. The CW nature of the beam results in high average powers (order 1 kW) from the IR FEL in the region from 4 to 20 microns and from the UV FEL in the 0.15 to 0.25 micron region. Tunable radiation at this power level places extreme demands on the optical systems. The approaches developed to resolve the optics issues will be examined and progress in implementation and testing is presented.

Paper Details

Date Published: 13 August 1993
PDF: 15 pages
Proc. SPIE 1868, Laser Resonators and Coherent Optics: Modeling, Technology, and Applications, (13 August 1993); doi: 10.1117/12.150626
Show Author Affiliations
George R. Neil, Continuous Electron Beam Accelerator Facility (United States)
Stephen V. Benson, Continuous Electron Beam Accelerator Facility (United States)


Published in SPIE Proceedings Vol. 1868:
Laser Resonators and Coherent Optics: Modeling, Technology, and Applications
Anup Bhowmik, Editor(s)

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