Design of the National Ignition Facility static x-ray imager

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Abstract

Two static x-ray imagers (SXI) will be used to monitor beam pointing on all target shots in the National Ignition Facility. These pinhole-based instruments will provide time integrated two-dimensional images of target x-ray emissions in the energy range between 2 and 3 keV. These instruments are not DIM based and will view along dedicated lines of sight from near the top and bottom ports of the target chamber. Beams that miss or clip the hohlraum laser-entrance holes will produce x-ray emission on the ends of the hohlraum, indicating improper beam pointing and/or target positioning. The SXIs will also be used to quantify beam focusing and pointing by producing x-ray images of dedicated test targets irradiated by focused beams at precalculated positions. A proposed design is presented, along with supporting data from NOVA target experiments. © 2001 American Institute of Physics.

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Landon, M. D., Koch, J. A., Alvarez, S. S., Bell, P. M., Lee, F. D., & Moody, J. D. (2001). Design of the National Ignition Facility static x-ray imager. Review of Scientific Instruments, 72(1 II), 698–700. https://doi.org/10.1063/1.1318255

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