Shock-Augmented Ignition1 (SAI) is a new Laser Inertial Fusion concept which seeks to tread an optimal middle ground between Central Hotspot Ignition2 and Shock Ignition3. By employing a dip in laser-power followed by a rapid rise, simulations indicate SAI enables the generation of a strong shock without the high laser intensity conventionally thought to be required for shock ignition. This in turn enables higher fusion energy-gain at a lower implosion velocity. Initial work shows that SAI may be applicable to both indirect and direct drive.
In this talk I will discuss the Shock-Augmented Ignition concept and experiments performed on both the National Ignition Facility, Lawrence Livermore National Laboratory and the Omega laser facility at the Laboratory for Laser Energetics.
1 Scott et al, Physical Review Letters, (2022).
2 Nuckolls et al, Nature, (1972).
3 Betti et al, Physical Review Letters (2007).