Effects of Laser Bandwidth in Direct-Drive High-Performance DT-Layered Implosions on the OMEGA Laser

Patel, Dhrumir; Knauer, J.  P.; Cao, D.; Betti, R.; Nora, Ryan; Shvydky, A.; Gopalaswamy, V.; Lees, A.; Sampat, Siddharth; Donaldson, W.  R.; Regan, S.  P.; Stoeckl, C.; Forrest, C.  J.; Glebov, Vladimir  Yu.; Harding, D.  R.; Bonino, M.  J.; Janezic, R.  T.; Wasilewski, D.; Fella, C.; Shuldberg, C.; Murray, J.; Guzman, D.; Serrato, B.

doi:10.1103/physrevlett.131.105101

Title: Effects of Laser Bandwidth in Direct-Drive High-Performance DT-Layered Implosions on the OMEGA Laser

Journal Article · 07 September 2023 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.131.105101 · OSTI ID:2008037

^[1]; Knauer, J. P. ^[2];

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^[2]; Harding, D. R. ^[2]; Bonino, M. J. ^[2];

^[2]; Wasilewski, D. ^[2]; Fella, C. ^[2]; Shuldberg, C. ^[4] more »

Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Laboratory for Laser Energetics, University of Rochester
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
General Atomics, San Diego, CA (United States)

In direct-drive inertial confinement fusion, the laser bandwidth reduces the laser imprinting seed of hydrodynamic instabilities. The impact of varying bandwidth on the performance of direct-drive DT-layered implosions was studied in targets with different hydrodynamic stability properties. The stability was controlled by changing the shell adiabat from (α_F ≃ 5) (more stable) to (α_F ≃ 3.5) (less stable). Herein these experiments show that the performance of lower adiabat implosions improves considerably as the bandwidth is raised indicating that further bandwidth increases, beyond the current capabilities of OMEGA, would be greatly beneficial. These results suggest that the future generation of ultra-broadband lasers could enable achieving high convergence and possibly high gains in direct drive ICF.

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Research Organization:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003856

OSTI ID:: 2008037

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 131; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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