Analysis of Time Gated K-shell Ni Spectra Created by Implosion of DPWA

ORAL

Abstract

Spectroscopy is a useful tool for understanding plasma. It can be used to estimate plasma conditions which when paired with time gated spectra helps characterize how plasma evolves. Double planar wire arrays (DPWAs) are a Z-pinch in which two parallel arrays of wires are imploded by passing high current through the wires. Using a load current multiplier (LCM) with the Zebra generator, a current of up to 1.9 MA can be achieved to implode the array. DPWAs composed of 12 Alumel (96{\%} Ni, 2{\%} Al, 2{\%} Si) wires per plane were imploded while time gated diagnostics including x-ray spectrometers and pinhole cameras were fielded. The time gate spectra collected from these experiments include K-shell Ni radiation that shows an evolving ionization balance with various ionization stages appearing and disappearing throughout the implosion process. Results from these experiments and modeling will be presented highlighting the value of time gate diagnostics to study atomic processes in Z-pinch plasmas.

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Authors

  • Austin Stafford

    University of Nevada, Reno

  • Yeh-Chia Chang

    Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory, Massachusetts Institute of Technology, Navy Children School, Mumbai, Maharashtra, University of California, Santa Cruz, The University of Chicago, University of Nevada, Reno, UC Davis, MSE Dept., Georgetown University, Dept. of Physics, CNM, Argonne National Laboratory, UC Davis, Physics Dept., NIST, University of Tennessee, Dept. of Physics, Hokkaido Univ., Japan, Dept. of Physics, Univ. of CA, San Diego, Dept. of Physics, California State Univ., Fresno

  • Yeh-Chia Chang

    Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory, Massachusetts Institute of Technology, Navy Children School, Mumbai, Maharashtra, University of California, Santa Cruz, The University of Chicago, University of Nevada, Reno, UC Davis, MSE Dept., Georgetown University, Dept. of Physics, CNM, Argonne National Laboratory, UC Davis, Physics Dept., NIST, University of Tennessee, Dept. of Physics, Hokkaido Univ., Japan, Dept. of Physics, Univ. of CA, San Diego, Dept. of Physics, California State Univ., Fresno

  • Yeh-Chia Chang

    Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory, Massachusetts Institute of Technology, Navy Children School, Mumbai, Maharashtra, University of California, Santa Cruz, The University of Chicago, University of Nevada, Reno, UC Davis, MSE Dept., Georgetown University, Dept. of Physics, CNM, Argonne National Laboratory, UC Davis, Physics Dept., NIST, University of Tennessee, Dept. of Physics, Hokkaido Univ., Japan, Dept. of Physics, Univ. of CA, San Diego, Dept. of Physics, California State Univ., Fresno

  • Yeh-Chia Chang

    Lawrence Berkeley National Laboratory, Lawrence Livermore National Laboratory, Massachusetts Institute of Technology, Navy Children School, Mumbai, Maharashtra, University of California, Santa Cruz, The University of Chicago, University of Nevada, Reno, UC Davis, MSE Dept., Georgetown University, Dept. of Physics, CNM, Argonne National Laboratory, UC Davis, Physics Dept., NIST, University of Tennessee, Dept. of Physics, Hokkaido Univ., Japan, Dept. of Physics, Univ. of CA, San Diego, Dept. of Physics, California State Univ., Fresno