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Title: Laser Examination of Wire Array Dynamics on Z.

Abstract

Abstract not provided.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories.,
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1141641
Report Number(s):
SAND2006-3444C
506725
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the ICOPS2004 held June 27 - July 1, 2004 in Baltimore, MD.
Country of Publication:
United States
Language:
English

Citation Formats

Bliss, David E, Rogowski, Sonrisa T, Cuneo, Michael Edward, Sinars, Daniel Brian, Coverdale, Christine Anne, Jones, Brent Manley, Nash, Thomas J., Sanford, Thomas Williamlou., Sarkisov, Gennady, and Waisman, Eduardo. Laser Examination of Wire Array Dynamics on Z.. United States: N. p., 2006. Web.
Bliss, David E, Rogowski, Sonrisa T, Cuneo, Michael Edward, Sinars, Daniel Brian, Coverdale, Christine Anne, Jones, Brent Manley, Nash, Thomas J., Sanford, Thomas Williamlou., Sarkisov, Gennady, & Waisman, Eduardo. Laser Examination of Wire Array Dynamics on Z.. United States.
Bliss, David E, Rogowski, Sonrisa T, Cuneo, Michael Edward, Sinars, Daniel Brian, Coverdale, Christine Anne, Jones, Brent Manley, Nash, Thomas J., Sanford, Thomas Williamlou., Sarkisov, Gennady, and Waisman, Eduardo. Mon . "Laser Examination of Wire Array Dynamics on Z.". United States. doi:. https://www.osti.gov/servlets/purl/1141641.
@article{osti_1141641,
title = {Laser Examination of Wire Array Dynamics on Z.},
author = {Bliss, David E and Rogowski, Sonrisa T and Cuneo, Michael Edward and Sinars, Daniel Brian and Coverdale, Christine Anne and Jones, Brent Manley and Nash, Thomas J. and Sanford, Thomas Williamlou. and Sarkisov, Gennady and Waisman, Eduardo},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2006},
month = {Mon May 01 00:00:00 EDT 2006}
}

Conference:
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  • A systematic study of annular aluminum-wire z-pinches on the Saturn accelerator shows that the quality of the implosion, including the radiated power, increases with wire number. Radiation magnetohydrodynamic (RMEC) xy simulations suggest that the implosion transitions from that of individual wire plasmas to that of a continuous plasma shell when the interwire spacing is reduced below {approximately} 1.4 mm. In the plasma-shell regime, the experimental implosions exhibit 1D- and 2D-code characteristics as evidenced by the presence of a strong first and a weak second radiation pulse that correlates with a strong and weak radial convergence. In this regime, many ofmore » the radiation and plasma characteristics are in agreement with those simulated by 2D-RMHC rz simulations. Moreover, measured changes in the radiation pulse width with variations in array mass and radius are consistent with the simulations and are explained by the development of 2D fluid motion in the rz plane. Associated variations in the K-shell yield are qualitatively explained by simple K-shell radiation scaling models.« less
  • A systematic study of annular aluminum-wire z-pinches on the Saturn accelerator shows that the quality of the implosion, (as measured by the radial convergence, the radiated energy, pulse width, and power), increases with wire number. Radiation magnetohydrodynamic (RMHC) xy simulations suggest that the implosion transitions from that of individual wire plasmas to that of a continuous plasma shell when the interwire spacing is reduced below {approximately} 1.4 mm. In this plasma-shell regime, many of the global radiation and plasma characteristics are in agreement with those simulated by 2D-RMHC rz simulations. In this regime, measured changes in the radiation pulse widthmore » with variations in load mass and array radius are consistent with the simulations and are explained by the development of 2D fluid motion in the rz plane. Associated variations in the K-shell yield are qualitatively explained by simple radiation-scaling models.« less
  • A series of experiments at the Z Accelerator was performed with 40mm and 50mm diameter nested wire arrays to investigate the interaction of the arrays and assess radiative characteristics. These arrays were fielded with one array as Al:Mg (either the inner or the outer array) and the other array as Ni-clad Ti (the outer or inner array, with respect to location of the Al:Mg). In all the arrays, the mass and radius ratio of the outer:inner was 2:1. The wire number ratio was also 2:1 in some cases, but the Al:Mg wire number was increased in some loads. This presentationmore » will focus on analysis of the emitted radiation (in multiple photon energy bins) and measured plasma conditions (as inferred from x-ray spectra). A discussion on what these results indicate about nested array dynamics will also be presented.« less
  • Analysis of 50 mm diameter wire arrays at the Z Accelerator has shown experimentally the accretion of mass in a stagnating z pinch and provided insight into details of the radiating plasma species and plasma conditions. This analysis focused on nested wire arrays with a 2:1 (outeninner) mass, radius, and wire number ratio where Al wires were fielded on the outer array and Ni-clad Ti wires were fielded on the inner array.In this presentation, we will present analysis of data from other mixed Al/Ni-clad Ti configurations to further evaluate nested wire array dynamics and mass accretion. These additional configurations includemore » the opposite configuration to that described above (Ni-clad Ti wires on the outer array, with Al wires on the inner array) as well as higher wire number Al configurations fielded to vary the interaction of the two arrays. These same variations were also assessed for a smaller diameter nested array configuration (40 mm). Variations in the emitted radiation and plasma conditions will be presented, along with a discussion of what the results indicate about the nested array dynamics. Additional evidence for mass accretion will also be presented.« less
  • Abstract not provided.