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Target areal density (ρR) asymmetries in OMEGA direct-drive spherical implosions are studied. The rms variation ⟨δρR⟩/⟨ρR⟩ for low-mode-number structure is approximately proportional to the rms variation of on-target laser intensity ⟨δI⟩/⟨I⟩ with an amplification factor of ~1/2(Cᵣ-1), where Cᵣ is the capsule convergence ratio. This result has critical implications for future work on the National Ignition Facility as well as OMEGA.
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Li et al. (2004) studied this question.
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