We study the optimization of collisionless shock acceleration of ions based on hydrodynamic modelling and simulations of collisional shock waves in gaseous targets.The models correspond to the specifications required ...We study the optimization of collisionless shock acceleration of ions based on hydrodynamic modelling and simulations of collisional shock waves in gaseous targets.The models correspond to the specifications required for experiments with the CO2 laser at the Accelerator Test Facility at Brookhaven National Laboratory and the Vulcan Petawatt system at Rutherford Appleton Laboratory.In both cases,a laser prepulse is simulated to interact with hydrogen gas jet targets.It is demonstrated that by controlling the pulse energy,the deposition position and the backing pressure,a blast wave suitable for generating nearly monoenergetic ion beams can be formed.Depending on the energy absorbed and the deposition position,an optimal temporal window can be determined for the acceleration considering both the necessary overdense state of plasma and the required short scale lengths for monoenergetic ion beam production.展开更多
基金support of this work by the project‘ELI-LASERLAB Europe Synergy,HiPER&IPERION-CH.gr’(MIS 5002735)which is implemented under the Action‘Reinforcement of the Research and Innovation Infrastructure’funded by the Operational Programme‘Competitiveness,Entrepreneurship and Innovation’(NSRF 2014-2020)co-financed by Greece and the European Union(European Regional Development Fund)。
文摘We study the optimization of collisionless shock acceleration of ions based on hydrodynamic modelling and simulations of collisional shock waves in gaseous targets.The models correspond to the specifications required for experiments with the CO2 laser at the Accelerator Test Facility at Brookhaven National Laboratory and the Vulcan Petawatt system at Rutherford Appleton Laboratory.In both cases,a laser prepulse is simulated to interact with hydrogen gas jet targets.It is demonstrated that by controlling the pulse energy,the deposition position and the backing pressure,a blast wave suitable for generating nearly monoenergetic ion beams can be formed.Depending on the energy absorbed and the deposition position,an optimal temporal window can be determined for the acceleration considering both the necessary overdense state of plasma and the required short scale lengths for monoenergetic ion beam production.
