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Title: Laser-driven γ-ray, positron, and neutron source from ultra-intense laser-matter interactions

In ultra-intense laser-matter interactions, γ-rays are effectively generated via the radiation reaction effect. Since a significant fraction of the laser energy is converted into γ-rays, understanding of the energy transport inside of the target is important. We have developed a Particle-in-Cell code which includes generation of the γ-rays, their energy transport, and photo-nuclear reactions. Using the code, we have investigated the characteristics of the quantum beams generated by the transport of the laser-driven γ-rays. It is shown that collimated, mono-energetic positron beams with hundreds of MeV are generated by using thick targets. Neutron beams are also effectively generated by using beryllium targets via photo-nuclear reactions. These lead to the proposal of quantum beam sources of γ-rays, positrons, and neutrons with distinctive characters, which are selectively generated by choosing target conditions.
Authors:
 [1] ;  [2]
  1. Fukuoka Institute of Technology, Fukuoka, Fukuoka 811-0295 (Japan)
  2. Japan Atomic Energy Agency, Tokai, Ibaraki 319-1106 (Japan)
Publication Date:
OSTI Identifier:
22490083
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BERYLLIUM; COMPUTER CALCULATIONS; ENERGY TRANSFER; GAMMA RADIATION; LASER RADIATION; MEV RANGE; NEUTRON BEAMS; NEUTRON SOURCES; NEUTRONS; PHOTONUCLEAR REACTIONS; POSITRON BEAMS