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30 May 2003 Operation of the Jefferson Lab FEL: optics lessons learned
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The IR Demo FEL User Facility at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) provided users with a unique source of laser radiation from 1999 to 2001. Utilizing superconducting RF linacs with electron recirculation and energy recovery, the machine lased with up to 2100 W of average power output at 3.1 microns with very high beam quality. It was capable of output wavelengths in the 1 to 6 micron range and produced ~0.7 ps (and shorter) pulses in a continuous train at ~75 MHz. This subjected the cavity optics to a unique combination of high average and peak irradiances. In addition, cavity optics were subjected to high energy X-rays in a high vacuum environment. In this talk I will summarize how the optics (cavity and transport) survived these conditions. Upgrades that are underway will extend operation beyond 10 kW average power in the near IR and kilowatt levels of power at wavelengths from 0.3 to 14 microns. Drawing from our experience and from research presented at these symposia, I will present the design of these new lasers.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michelle D. Shinn "Operation of the Jefferson Lab FEL: optics lessons learned", Proc. SPIE 4932, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization, (30 May 2003);


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