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DOE OSTI · 2588212

On-target uniformity of the OMEGA 60-beam inertial confinement fusion laser

Abstract

Successful direct-drive inertial confinement fusion (ICF) experiments require excellent on-target laser 9 irradiance uniformity maintained over the duration of the pulse. Achieving this symmetry relies on maintaining an 10 energy, power, and fluence balance among all beams in a multibeam laser system. As a result of the improvements 11 described in this paper, the OMEGA 60-beam laser performance has been assessed at approximately 2% on-target 12 irradiance nonuniformity using an updated performance assessment metric that accounts for the laser diagnostic noise 13 floor. The performance is measurement-limited, prompting the need for an improved diagnostic suite. This manuscript 14 provides a comprehensive first-order assessment of extant status of on-target energy, power, and fluence uniformity 15 and explores avenues for improvements.

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BibTeXRIS

Sampat, Siddharth [University of Rochester, NY (United States)], Kwiatkowski, Joseph [University of Rochester, NY (United States)], Heimbueger, Matthew [University of Rochester, NY (United States)], Ehrich, Brian [University of Rochester, NY (United States)], Shvydky, Alexander [University of Rochester, NY (United States)], Waxer, Leon J. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], Kruschwitz, Brian E. [University of Rochester, NY (United States)]. 2025-09-11. On-target uniformity of the OMEGA 60-beam inertial confinement fusion laser. https://doi.org/10.1117/1.oe.64.9.096102

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