Hydrodynamic computational modelling and simulations of collisional shock waves in gas jet targets

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 $\text{CO}_{2}$ laser at the Accelerator Test Facility at...

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Bibliographic Details
Published in:High power laser science and engineering 2020-01, Vol.8, Article e7
Main Authors: Passalidis, Stylianos, Ettlinger, Oliver C., Hicks, George S., Dover, Nicholas P., Najmudin, Zulfikar, Benis, Emmanouil P., Kaselouris, Evaggelos, Papadogiannis, Nektarios A., Tatarakis, Michael, Dimitriou, Vasilis
Format: Article
Language:English
Subjects:
Computer simulation
Deposition
Energy
Experiments
Gas jets
Gases
Hydrogen
Ion beams
Lasers
Optimization
Plasma
Shock waves
Simulation
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Summary: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 $\text{CO}_{2}$ 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.
ISSN:2095-4719
2052-3289
DOI:10.1017/hpl.2020.5