In cooperation with the Iranian Nuclear Society

Document Type : Research Paper

Authors

1 سازمان انرژی اتمی ایران- پژوهشگاه علوم و فنون هسته ای

2 عضو هییت علمی

Abstract

Low-intensity laser prepulses (<1013 W cm−2, nanosecond duration and <1017 W cm−2, picosecend duration ) are a major issue in experiments on laser-induced generation of protons, often limiting the performances of proton sources produced by high-intensity lasers. Depending on the intensity regime and target thickness, several effects may be associated with the prepulse. In this work, in order to get closer to the real experiments, specifically for the prepulse parameters of the ATLAS laser facility, including a 20 picosecond prepulse, and for different target thicknesses (from 1-0.12 μm) hydrodynamic simulations were performed with fluid code and the target parameters were extracted at the end of the prepulse interaction time. According to the results obtained for these specific prepulse conditions, the thickness of 0.25 μm is optimal for the interaction of the main pulse with the target. In smaller thicknesses, the density profile on the rear surface of the target will be affected, so that decreases the acceleration efficiency.

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