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Whether these effects can be suppressed enough at full scale is unknown.","posed_since":"","precise":"At ignition-scale direct drive (intensity about $1e22\\,\\mathrm{erg}\\,\\mathrm{s}^{-1}\\,\\mathrm{cm}^{-2}$), cross-beam energy transfer, two-plasmon decay and stimulated Raman scattering reduce absorption and produce hot electrons that preheat the fuel. Determine the absorbed fraction and the hot-electron preheat energy at full scale, and whether broadband or multi-color laser light suppresses them enough to allow $G$ above 10. An answer is a validated kinetic plus hydrodynamic prediction tested at intermediate scale.","problem_ref":null,"references":"","settled_by":"Scaled experiments with broadband lasers that match predicted absorption and preheat, extrapolated by validated simulations.","status_note":"","title":"Control of laser-plasma instabilities in direct-drive 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