In an experiment performed with a high-intensity and high-energy laser system, α-particle production in proton-boron reaction by using a laser-driven proton beam was measured. α particles were observed from the front and also from the rear side, even after a 2-mm-thick boron target. The data obtained in this experiment have been analyzed using a sequence of numerical simulations. The simulations clarify the mechanisms of α-particle production and transport through the boron targets. α-particle energies observed in the experiment and in the simulation reach 10-20 MeV through energy transfer from 20-30 MeV energy incident protons. Despite the lower cross sections for protons with energy above the sub-MeV resonances in the proton-boron reactions, 108-109α particles per steradian have been detected.
Bibliographical noteFunding Information:
The PIC simulation work was granted access to HPC resources of TGCC under the allocation A0010506129 made by GENCI and under the allocation 2017174175 made by PRACE. This work has been carried out in the framework of regional project POPRA2 supported by the New Aquitaine Regional Council (Convention No. 18003358). This work has been carried out within the framework of the EUROfusion Enabling Research Project: ENR-IFE19.CEA-01 “Study of Direct Drive and Shock Ignition for IFE: Theory, Simulations, Experiments, Diagnostics Development” and has received funding from the Euratom research and training programme 2019-2020 under Grant Agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. This work was partially supported by JSPS KAKENHI No. 19H00668.
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ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Statistics and Probability
- Condensed Matter Physics