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Sub-100 ps laser-driven dynamic compression of solid deuterium with a ∼40 μJ laser pulse

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5 Author(s)
Armstrong, Michael R. ; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA ; Crowhurst, Jonathan C. ; Bastea, Sorin ; Zaug, Joseph M.
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We dynamically compress solid deuterium over <100 ps from initial pressures of 22 GPa to 55 GPa, to final pressures as high as 71 GPa, with <40 μJ of pulse energy. At 25 GPa initial pressure, we measure compression wave speeds consistent with quasi-isentropic compression and a 24% increase in density. The laser drive energy per unit density change is 109 times smaller than it is for recent longer (∼30 ns) time scale compression experiments. This suggests that, for a given final density, dynamic compression of hydrogen might be achieved using orders of magnitude lower laser energy than currently used.

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Applied Physics Letters  (Volume:105 ,  Issue: 2 )