58 / 2025-03-07 16:38:07

Optimization of the plasma implosions driven by CPP modulated laser beams for the Double-Cone Ignition scheme

Double-Cone Ignition, Implosions, MULTI-2D, Artificial intelligence

Double-cone ignition (DCI) scheme is one of the promising fast-ignition schemes for high-gain laser driven fusion energy [1]. DCI scheme employs two head-on gold cones to guide the nanosecond laser driven implosion to obtain high-density colliding plasmas with sharp edges, for the injection of relativistic electrons generated by PW picosecond ignition laser pulses. The exist of implosion gold cones make it necessary to optimize the plasma implosion with two-dimensional hydrodynamic codes. In this report, we present optimization of the plasma implosions of the DCI scheme with the MULTI-2D simulations [2-3]. The laser beams is modulated by special CPPs (Continuous Phase Plates) to achieve quasi-uniform irradiation. Both the gold cones and laser screens are modeled in the simulations. It is found that compressed colliding plasmas with densities higher than 100 g/cc can be achieved on the SG-II Upgraded laser facility.