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Ignition feedback regenerative free electron laser (FEL) amplifier

United States Patent

September 4, 2001
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
An ignition feedback regenerative amplifier consists of an injector, a linear accelerator with energy recovery, and a high-gain free electron laser amplifier. A fraction of the free electron laser output is coupled to the input to operate the free electron laser in the regenerative mode. A mode filter in this loop prevents run away instability. Another fraction of the output, after suitable frequency up conversion, is used to drive the photocathode. An external laser is provided to start up both the amplifier and the injector, thus igniting the system.
Kim; Kwang-Je (Burr Ridge, IL), Zholents; Alexander (Walnut Creek, CA), Zolotorev; Max (Oakland, CA)
Bennett Optical Research, Inc. (Ridgecrest, CA)
09/ 361,675
July 27, 1999
The United States Government has rights in this invention pursuant to Contract No. DE-AC03-76SF00098 between the U.S. Department of Energy and the University of California, for the operation of Lawrence Berkeley National Laboratory and Agreement BG97-100(00) between Lawrence Berkeley National Laboratory and the City of Ridgecrest, Calif.