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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 2002),
  • paper JTuA3

High Energy Astrophysics with Ultra-Intense Lasers

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Abstract

I have reviewed fifteen possible model experiments on astrophysics with lasers and 1 called such research field “Laser Astrophysics”.1 In my talk, I only talk about the case of high-energy astrophysics (HEA), although there are many other topics in non-relativistic regime. When an focused ultra-intense laser is irradiated on high-Z material, relativistic high-energy electrons are efficiently produced, and subsequent nuclear and QED (quantum electrodynamics) phenomena are expected to take place inside the target via the relativistic electrons. Relativistic Fokker-Planck equation has been solved numerically for electron and positron2 with parameters used in the experiment.3 We have clarified what physics is most important in the experiment and haw the energy spectrum of the created positrons are determined. Such studied suggest an expectation to make relativistic and dense electron-positron plasmas in laboratories. In High-Energy Astrophysics, the such plasmas are one of the most important key elements to understand, for example, physics of Pulsar, plasmas near a black hole, AGN (Active Galactic Nuclei), Gamma-ray bursts, MeV epoch in the Big Bang. 1 would like to review the present issue related to such topics in HEA. Then, 1 would like to consider what kind of model experiments of HEA can be done with the electron-positron plasmas produced by the ultra-intense lasers, mainly based on model simulations with Fokker-Planck and relativistic hydrodynamic codes.4

© 2002 Optical Society of America

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