Generation of alpha-Particle Beams With a Multi-kJ, Peta-Watt Class Laser System


Original experimental results on generation of energetic α-particles driven by lasers were demonstrated experimentally. The experiment was performed at the Institute of Laser Engineering in Osaka using the short-pulse, high-intensity, high-energy, PW-class laser. The laser pulse was focused onto a thin plastic foil (pitcher) to generate a proton beam by the well-known TNSA mechanism which, in turn, was impinging onto a boron-nitride (BN) target (catcher) to generated alpha-particles as a result of proton-boron nuclear fusion events. Our results demonstrate generation of α-particles with energies in the range 8–10 MeV and with a flux around 5 × 109 sr−1.

A sketch of the experimental geometries investigated in the experiment
(A) study of proton generation from plastic target (B) in-target pB reaction, and (C) beam-target pB reaction. Also shown the angular position of Thomson Parabola and CR 39 detector.

Contact person: Daniele Margarone, Ph.D.

Collaborating institutions:

Institute of Laser Engineering (ILE), Osaka University, Osaka, Japan

Centre of Intense Lasers and Applications (CELIA), University of Bordeaux, Bordeaux, France

Centre for Plasma Physics, Queen's University of Belfast, Belfast, United Kingdom

Kansai Photon Science Institute, Kyoto, Japan

Southern National Laboratory (LNS), Istituto Nazionale Fisica Nucleare, Catania, Italy

Fondazione Bruno Kessler (FBK), Trento, Italy