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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1989),
  • paper JM1

Paladin: A 10.6-μm free-electron laser amplifier

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Abstract

Paladin is a free electron laser (FEL) amplifier designed to operate at 10.6 μm (CO2 wavelength). The electron beam for this FEL is provided by the Advanced Test Accelerator (ATA) at the Lawrence Livermore National Laboratory. The electron beam has an energy of 45 MeV. While we accelerate 3 kA of current, an emittance filter located between the end of the accelerator and the wiggler scrapes the electron beam to reduce the maximum emittance of the beam. In so doing, the current transmitted through the filter is between 500 and 700 A. This beam makes a single pass through a 15-m long wiggler with an 8-cm period. Beyond the wiggler, the beam is deflected into a beam dump, and the optical signal is analyzed for peak power, total energy, and optical mode. The input signal to the FEL is provided by a CO2 laser with a 50-ns pulse length. The input power is either 14 kW or 5 MW.

© 1989 Optical Society of America

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