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Title: Implosion dynamics and Spectroscopy of X-pinches and Wire arrays with doped Al wires on the UNR 1MA Z-pinch generator

Abstract

The study of implosion dynamics and spectroscopy of X-pinches and wire arrays with Al wires alloyed or coated with other near-Z or higher-Z materials is discussed. In particular, X-pinches from two combined Al 5056 and Mo wires and composed from four identical Al 5056 (5%Mg) wires and Cu clad Al (90% Al and 10%Cu) are studied. In addition, wire arrays with Alumel wires (95% Ni and 5% Al) and with Al 5056 wires (uncoated) and coated with 5% NaF are investigated. Spatially-resolved and integrated x-ray spectral data and time integrated and time-gated pinhole x-ray images accumulated in these X-pinch and wire array experiments on the UNR 1MA Zebra generator are analyzed. Modeling of K-shell radiation from Mg provides K-shell plasma parameters for all Al 5056 wire experiments, whereas modeling of L-shell radiation from Ni, Cu, and Mo provide parameters for L-shell plasmas. The importance of using different materials or dopants for understanding of implosion dynamics of different wire materials is illustrated.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;  [1]; ; ;  [2]; ;  [3]
  1. Physics Department/220, University of Nevada, Reno, NV 89557 (United States)
  2. Sandia National Laboratories, Albuquerque, NM 87185 (United States)
  3. KTech Corp., Albuquerque, NM 87123 (United States)
Publication Date:
OSTI Identifier:
20729236
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 808; Journal Issue: 1; Conference: 6. international conference on dense Z-pinches, Oxford (United Kingdom), 25-28 Jul 2005; Other Information: DOI: 10.1063/1.2159341; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALUMEL; COMPUTERIZED SIMULATION; DOPED MATERIALS; EXPLODING WIRES; IMAGES; IMPLOSIONS; K SHELL; L SHELL; MOLYBDENUM ALLOYS; PLASMA; SODIUM FLUORIDES; X RADIATION; X-RAY SPECTROSCOPY

Citation Formats

Safronova, Alla, Kantsyrev, Victor, Esaulov, Audrey, Fedin, Dmitry, Ouart, Nicholas, Yilmaz, Fatih, Osborne, Glenn, Nalajala, Vidya, Pokala, Shivaji, Shrestha, Ishor, Astanovitsky, Alexey, Batie, Steve, LeGalloudec, Bruno, Cowan, Tom, Jones, Brent, Coverdale, Christine, Deeney, Chris, LePell, David, and Gradel, Josh. Implosion dynamics and Spectroscopy of X-pinches and Wire arrays with doped Al wires on the UNR 1MA Z-pinch generator. United States: N. p., 2006. Web. doi:10.1063/1.2159341.
Safronova, Alla, Kantsyrev, Victor, Esaulov, Audrey, Fedin, Dmitry, Ouart, Nicholas, Yilmaz, Fatih, Osborne, Glenn, Nalajala, Vidya, Pokala, Shivaji, Shrestha, Ishor, Astanovitsky, Alexey, Batie, Steve, LeGalloudec, Bruno, Cowan, Tom, Jones, Brent, Coverdale, Christine, Deeney, Chris, LePell, David, & Gradel, Josh. Implosion dynamics and Spectroscopy of X-pinches and Wire arrays with doped Al wires on the UNR 1MA Z-pinch generator. United States. doi:10.1063/1.2159341.
Safronova, Alla, Kantsyrev, Victor, Esaulov, Audrey, Fedin, Dmitry, Ouart, Nicholas, Yilmaz, Fatih, Osborne, Glenn, Nalajala, Vidya, Pokala, Shivaji, Shrestha, Ishor, Astanovitsky, Alexey, Batie, Steve, LeGalloudec, Bruno, Cowan, Tom, Jones, Brent, Coverdale, Christine, Deeney, Chris, LePell, David, and Gradel, Josh. Thu . "Implosion dynamics and Spectroscopy of X-pinches and Wire arrays with doped Al wires on the UNR 1MA Z-pinch generator". United States. doi:10.1063/1.2159341.
@article{osti_20729236,
title = {Implosion dynamics and Spectroscopy of X-pinches and Wire arrays with doped Al wires on the UNR 1MA Z-pinch generator},
author = {Safronova, Alla and Kantsyrev, Victor and Esaulov, Audrey and Fedin, Dmitry and Ouart, Nicholas and Yilmaz, Fatih and Osborne, Glenn and Nalajala, Vidya and Pokala, Shivaji and Shrestha, Ishor and Astanovitsky, Alexey and Batie, Steve and LeGalloudec, Bruno and Cowan, Tom and Jones, Brent and Coverdale, Christine and Deeney, Chris and LePell, David and Gradel, Josh},
abstractNote = {The study of implosion dynamics and spectroscopy of X-pinches and wire arrays with Al wires alloyed or coated with other near-Z or higher-Z materials is discussed. In particular, X-pinches from two combined Al 5056 and Mo wires and composed from four identical Al 5056 (5%Mg) wires and Cu clad Al (90% Al and 10%Cu) are studied. In addition, wire arrays with Alumel wires (95% Ni and 5% Al) and with Al 5056 wires (uncoated) and coated with 5% NaF are investigated. Spatially-resolved and integrated x-ray spectral data and time integrated and time-gated pinhole x-ray images accumulated in these X-pinch and wire array experiments on the UNR 1MA Zebra generator are analyzed. Modeling of K-shell radiation from Mg provides K-shell plasma parameters for all Al 5056 wire experiments, whereas modeling of L-shell radiation from Ni, Cu, and Mo provide parameters for L-shell plasmas. The importance of using different materials or dopants for understanding of implosion dynamics of different wire materials is illustrated.},
doi = {10.1063/1.2159341},
journal = {AIP Conference Proceedings},
number = 1,
volume = 808,
place = {United States},
year = {Thu Jan 05 00:00:00 EST 2006},
month = {Thu Jan 05 00:00:00 EST 2006}
}
  • The study of implosion dynamics and spectroscopy of X-pinches and wire arrays with Al wires alloyed or coated with other near-Z or higher-Z materials is discussed. In particular, X-pinches from two combined Al 5056 and Mo wires and composed from four identical Al 5056 (5%Mg) wires and Cu clad Al (90% Al and 10%Cu) are studied. In addition, wire arrays with Alumel wires (95% Ni and 5% Al) and with Al 5056 wires (uncoated) and coated with 5% NaF are investigated. Spatially-resolved and integrated x-ray spectral data and time integrated and time-gated pinhole x-ray images accumulated in these X-pinch andmore » wire array experiments on the UNR 1MA Zebra generator are analyzed. Modeling of K-shell radiation from Mg provides K-shell plasma parameters for all Al 5056 wire experiments, whereas modeling of L-shell radiation from Ni, Cu, and Mo provide parameters for L-shell plasmas. The importance of using different materials or dopants for understanding of implosion dynamics of different wire materials is illustrated.« less
  • Tracer aluminum alloyed wires (Al5056) are used to provide additional information for x-ray diagnostics of implosions of Cu planar wire arrays (PWAs). Specifically, the analysis of combined PWA experiments using the extensive set of x-ray diagnostics is presented. In these experiments, which were conducted at the 1MA pulsed power generator at University of Nevada, Reno, the Z-pinch load consisted of several (eight) Cu alloyed (main material) and one to two Al alloyed (tracer) wires mounted in a single plane row or double parallel plane rows, single planar wire array (SPWA) or double planar wire array (DPWA), respectively. The analysis ofmore » x-ray spatially resolved spectra from the main material indicates the increase in the electron temperature T{sub e} near the cathode. In general, the axial gradients in T{sub e} are more pronounced for SPWA than for DPWA due to the more 'columnlike' plasma formation for SPWA compared to 'hot-spot-like' plasma formation for DPWA. In addition, x-ray spectra from tracer wires are studied, and estimated plasma parameters are compared with those from the main material. It is observed that the x-ray K-shell Al spectra manifest more opacity features for the case of SPWA with about 18% of Al mass (to the total load mass) compared to the case of DPWA with about 11% of Al mass. The analysis of time-gated spectra shows that the relative intensity of the most intense K-shell Al line, small before the x-ray burst, increases with time and peaks close to the maximum of the sub-keV signal.« less
  • X-pinch experiments using combined Mo and W wires were implemented on the 1MA Cornell University (CU) COBRA and University of Nevada, Reno (UNR) ZEBRA facilities. Spatially-resolved and integrated x-ray spectral data and time integrated and time-gated pinhole x-ray images accumulated in these X-pinch experiments are analyzed. In particular, x-ray L-shell spectra of Mo ions and M-shell spectra of W ions have been studied. A non-LTE collisional-radiative (CR) atomic kinetic model of Mo, successfully applied before to interpret UNR and CU x-ray spectra from Mo X-pinches, was used here to provide plasma parameters from L-shell Mo radiation from the combined (W/Mo)more » X-pinches. The recently developed non-LTE CR model of W based on FAC atomic structure code data has been applied to identify and diagnose the spectral features of W ions and to provide parameters of the plasma from M-shell W radiation from W/Mo X-pinches. As a result, the radiative properties of W/Mo X-pinches produced on two 1 MA university-scale pulsed power facilities are analyzed and compared.« less
  • No abstract prepared.