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Title: Optimization Methodology of Polar Direct-Drive Illumination for the National Ignition Facility

Journal Article · · Physical Review Letters
ORCiD logo [1];  [2]; ORCiD logo [1]; ORCiD logo [3];  [3];  [3]; ORCiD logo [3];  [3]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [5];  [6]; ORCiD logo [1]
  1. Université de Bordeaux, Talence (France)
  2. Université de Bordeaux, Talence (France); University of Rochester, NY (United States)
  3. University of Rochester, NY (United States)
  4. Queen’s University Belfast (United Kingdom)
  5. STFC Rutherford Appleton Laboratory, Oxford (United Kingdom)
  6. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Improved laser illumination uniformity drives shocks and implosions to create more extreme high energy density environments. Predominantly, the geometry of experiments that can be performed is dictated by the layout of beams at laser facilities, limiting inter-facility and multiscale investigations. This Letter presents the first automated, algorithmic approach for generating illumination configurations for high energy density experiments. The method is demonstrated in comparison to a polar direct drive solid target experiment at the National Ignition Facility. The new illumination configuration is simulated to create greater than ×3 higher peak pressure and almost ×2 higher density by maintaining better shock uniformity. Furthermore, the optimization process is performed with reduced computational expense and isotropic plasma profiles, while accounting for the impact of cross-beam energy transfer.

Research Organization:
University of Rochester, NY (United States)
Sponsoring Organization:
European Union; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0004144
OSTI ID:
2475934
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 133; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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