Increase of the density,temperature and velocity of plasma jets driven by a ring of high energy laser beams |
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Authors: | Wen Fu Edison P Liang Milad Fatenejad Donald Q Lamb Michael Grosskopf Hye-Sook Park Bruce Remington Anatoly Spitkovsky |
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Institution: | 1. Department of Physics and Astronomy, Rice University, Houston, TX 77005, USA;2. Flash Center for Computational Science, University of Chicago, Chicago, IL 60637, USA;3. Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109, USA;4. Lawrence Livermore National Laboratory, Livermore, CA 94550, USA;5. Department of Astrophysical Sciences, Princeton University, NJ 08544, USA |
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Abstract: | Supersonic plasma outflows driven by multi-beam, high-energy lasers, such as Omega and NIF, have been and will be used as platforms for a variety of laboratory astrophysics experiments. Here we propose a new way of launching high density and high velocity, plasma jets using multiple intense laser beams in a hollow ring formation. We show that such jets provide a more flexible and versatile platform for future laboratory astrophysics experiments. Using high resolution hydrodynamic simulations, we demonstrate that the collimated jets can achieve much higher density, temperature and velocity when multiple laser beams are focused to form a hollow ring pattern at the target, instead of focused onto a single spot. We carried out simulations with different ring radii and studied their effects on the jet properties. Implications for laboratory collisionless shock experiments are discussed. |
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Keywords: | Laboratory astrophysics Collisionless shocks Computational modeling |
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