High Repetition Rate Mapping of the Collisonless Coupling Between a Super-Alfvénic Piston Plasma and Magnetized Ambient Plasma
ORAL
Abstract
We present two-dimensional mapping of a super-Alfvénic (MA > 1) carbon, laser produced plasma (LPP) as it couples to an ambient, magnetized helium plasma through collisionless, collective processes. The data was acquired during recent experiments performed on the Large Plasma Device (LAPD) at the University of California, Los Angeles as part of a series of experiments recreating conditions observed in Earth’s magnetosphere for study in the laboratory. The Laminar coupling is investigated by utilizing laser induced fluorescence to measure the phase-space evolution of the LPP ions in conjunction with magnetic field traces that measure the energy departed into the ambient ions. The acquisition of this data requires a high repetition rate (~ 1 Hz) as each dataset represent thousands of laser shots in order to fully investigate the two-dimensional region of interest. The data is compared to fully kinetic, 2D3V PIC simulations in order to provide a framework in which we can understand the coupling and contextualize our results in the astrophysical environment.
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Presenters
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Robert S Dorst
University of California, Los Angeles
Authors
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Robert S Dorst
University of California, Los Angeles
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Ari Le
Los Alamos National Laboratory
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Carmen G Constantin
University of California, Los Angeles, UCLA
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Jessica J Pilgram
University of California, Los Angeles
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Derek B Schaeffer
Princeton University
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Steve T Vincena
University of California, Los Angeles, UCLA
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Shreekrishna Tripathi
University of California, Los Angeles
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Dan Winske
Los Alamos Natl Lab
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Misa Cowee
Los Alamos Natl Lab, Los Alamos National Laboratory
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David J Larson
Lawrence Livermore Natl Lab
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Christoph Niemann
University of California, Los Angeles