Time-Resolved Radial Velocity Profile Measurements on a Coaxial Plasma Accelerator
POSTER
Abstract
We report on measurements of the radial profile of the axial velocity component of a gas-fed shear-flow stabilized coaxial Z-pinch plasma accelerator operating in a deflagration mode. Doppler-shifted axially-directed spectral line emission of hydrogen and impurities are recorded from the plasma jet generated by the Stanford Coaxial High ENerGy (CHENG) device using a Raman monochromator paired with a high frame rate (10 MHz) intensified camera allowing for resolutions of up to 100 ns. This configuration affords single-shot video of 1D-1V dynamics (time-dependence) of the Stark-broadened/Doppler shifted spectral lines to determine axial velocity, temperature, and electron number density as a function of radial position. Derived velocities are compared to time-of-flight velocity measurements taken on the same device for the same conditions.
*This work is supported in part by the Lawrence Livermore National Laboratory High Energy Density Physics Fellowship, the Air Force Office of Scientific Research, and the Department of Energy Office of Fusion Energy Science. J.A.R acknowledges support by the U.S. Department of Energy, Office of Science, Office of Advanced Scientific Computing Research, Department of Computational Science Graduate Fellowship under Award Number [D-SC0019323].
Presenters
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Aduragbemi A Jibodu
- Stanford University