Overview of Laser Driven Relativistic Electron-positron Pair Creation Experiments at LLNL (H. Chen - LLNL, USA)
Relativistic electron-positron pair plasmas exist in many astrophysical objects and are important to explain energetic phenomena such as in Gamma Ray Bursts (GRBs). However, creating such plasmas in the laboratory has been a great challenge because of their high energy density and short lifetime due to annihilations.
Using high-intensity lasers, we have created high-flux of electron-positron pair jets at 10s of MeV energies from experiments at Lawrence Livermore National Laboratory, University of Rochester and Osaka University, with laser intensities between 10^18 – 10^21 W/cm2, pulse duration of 1-10 ps and energy 100 - 2000 J.
This talk will review the experimental results of characterizing and manipulating the pair jets, and discuss possibilities to exploit laser-produced pair jets for fundamental plasma physics studies, for diagnosing high-energy-density physics, and eventually for laboratory experiments mimicking the physics process in GRBs.
Acknowledgement: this work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
salle de conférences LULI - EP, bâtiment 84, RdC - 11:00