Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session TO06: Magnetized High-energy-density Plasma
9:30 AM–12:30 PM,
Thursday, October 20, 2022
Room: Ballroom 111 C
Chair: Alla Safronova, UNR
Abstract: TO06.00002 : Plasma flows from dual exploding wire arrays for the MARZ campaign on Z*
9:42 AM–9:54 AM
Presenter:
Rishabh Datta
(Massachusetts Institute of Technology)
Authors:
Rishabh Datta
(Massachusetts Institute of Technology)
Jeremy P Chittenden
(Imperial College London)
Aidan C Crilly
(Imperial College London)
William R Fox
(Princeton Plasma Physics Laboratory)
Jack W Halliday
(Imperial College London)
Christopher A Jennings
(Sandia National Laboratories)
Hantao Ji
(Princeton University)
Carolyn C Kuranz
(University of Michigan)
Raul F Melean
(University of Michigan)
Sergey V Lebedev
(Imperial College London)
Dmitri A Uzdensky
(University of Colorado, Boulder)
Clayton E Myers
(Sandia National Laboratories)
Katherine Chandler
(Sandia National Laboratories)
Jack D Hare
(MIT PSFC)
We use inductive probes, streaked visible spectroscopy (SVS), and gated optical self-emission imaging to diagnose the magnetic field, velocity, density, and temperature of the ablated plasma. Inductive probes positioned at different radii from the wires provide time- and space- resolved measurements of the magnetic field and flow velocity. The peak advected field is ~25-30 T, and the flow velocity is 100-150 km/s, consistent with simulations of the experimental setup. SVS optical spectra from 4 optical fibers positioned at different radii show well-defined Al-II and Al-III lines, which are sensitive to the electron density and temperature. These outflows collide with a 1 mm diameter glass rod, and generate a detached bow shock, the evolution of which is recorded using time-gated optical imaging. We use the opening angle of the bow shock to estimate the Mach number of the plasma flows.
**SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. This work is supported by the NSF EAGER Award PHY2213898.
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