Abstract
We have magnetically driven a tapered-thickness spherical aluminum shell implosion with a 12.5 MA axial discharge. The initially 4 cm radius, 0.1 to 0.2 cm thick, \ifmmode\pm\else\textpm\fi{}45\ifmmode^\circ\else\textdegree\fi{} latitude shell was imploded along conical electrodes. The implosion time was approximately 15 \ensuremath{\mu}sec. Radiography indicated substantial agreement with 2D-MHD calculations. Such calculations for this experiment predict final inner-surface implosion velocity of 2.5 to 3 cm/\ensuremath{\mu}sec, peak pressure of 56 Mbar, and peak density of 16.8 g/${\mathrm{cm}}^{3}$ (>6 times solid density). The principal experimental result is a demonstration of the feasibility of electromagnetic-driven spherical liner implosions in the cm/\ensuremath{\mu}sec regime.
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