| Ramped magnetic compression experiments were performed on aluminum, copper, and zirconium using an author-built modular ”Cinco” pulsed-power driver (≈ 1 MA, ≈ 250 ns
rise). Free-surface velocities were recorded using a multichannel photon Doppler velocimetry
(PDV) system and converted, in a Lagrangian framework, to pressure-density plots. The
resulting isentropic equation-of-state (EoS) curves exhibit clear elastic-plastic transitions,
surpassing the Hugoniot elastic limit (HEL) in aluminum and copper, and are consistent
with published diamond-anvil cell (DAC) data over the driver’s accessible compression range.
Cross-checks between driver-inferred magnetic pressure and weak-shock estimates from velocimetry indicate self-consistency, validating the machine and analytical pipelines. This
work establishes Cinco’s efficacy as a compact, high-shot-rate platform for quasi-isentropic
compression.
Keywords: quasi-isentropic compression, equation of state, pulsed power, high-energydensity physics, copper, aluminum, zirconium |