Simulations of a phase corrector plate for the National Ignition Facility

Wade H. Williams

doi:10.1117/12.354147

23 July 1999 Simulations of a phase corrector plate for the National Ignition Facility

Wade H. Williams

Proceedings Volume 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion; (1999) https://doi.org/10.1117/12.354147
Event: Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, 1998, Monterey, CA, United States

Abstract

Simulations are presented on the effect of placing a static phase corrector plate in each beamline of the NIF to assist the adaptive optic in correcting beam phase aberrations. Results indicate that such a plate could significantly improve the focal spot, reducing a 3 (omega) , 80 percent spot half-angle from 21 to 8 (mu) rad for poorer-quality optics, and 17 to 7 for better optics. Such a plate appears to be within the range of current fabrication technologies. It would have an alignment requirement of +/- 0.5 mm,l if placed in the front end. The NIF operation, the occasional replacement of laser slabs would slowly degrade the beam quality for a fixed corrector plate, with the spot size increasing from 8 to 15 (mu) rad after four new slabs for poorer optics, and 7 to 12 (mu) rad for better optics. The energy fraction clipped on the injection pinhole would be < 0.5 percent due to this pre-correction.

Citation Download Citation

Wade H. Williams "Simulations of a phase corrector plate for the National Ignition Facility", Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, (23 July 1999); https://doi.org/10.1117/12.354147

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