X-ray emission from a high-atomic-number z-pinch plasma created from compact wire arrays

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Thermal and nonthermal x-ray emission from the implosion of compact tungsten wire arrays in 5-MA Saturn discharges is reported. The timing of multiple implosions and the thermal x-ray spectra (1 to 10 keV) agree with 2D radiation-hydrocode simulations. Nonthermal x-ray emission (10 to 100 keV) correlates with pinch spots distributed along the z-axis. The similarities of the measured nonthermal spectrum, yield, and pinch-spot emission with those of 0.8-MA, single- exploded-wire discharges on Gamble-II suggest a common nonthermal- production mechanism. Nonthermal x-ray yields are lower than expected from current scaling of Gamble II results, suggesting that implosion geometries are not as ... continued below

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4 p.

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Sanford, T.W.L.; Mosher, D. & De Groot, J.S. June 1, 1996.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Thermal and nonthermal x-ray emission from the implosion of compact tungsten wire arrays in 5-MA Saturn discharges is reported. The timing of multiple implosions and the thermal x-ray spectra (1 to 10 keV) agree with 2D radiation-hydrocode simulations. Nonthermal x-ray emission (10 to 100 keV) correlates with pinch spots distributed along the z-axis. The similarities of the measured nonthermal spectrum, yield, and pinch-spot emission with those of 0.8-MA, single- exploded-wire discharges on Gamble-II suggest a common nonthermal- production mechanism. Nonthermal x-ray yields are lower than expected from current scaling of Gamble II results, suggesting that implosion geometries are not as efficient as single-wire geometries for nonthermal x-ray production. The instabilities, azimuthal asymmetries, and inferred multiple implosions that accompany the implosion geometry lead to larger, more irregular pinch spots, a likely reason for reduced nonthermal efficiency. A model for nonthermal-electron acceleration across magnetic fields in highly- collisional, high-atomic-number plasmas combined with 1D hydrocode simulations of Saturn compact loads predicts weak nonthermal x-ray emission.

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4 p.

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INIS; OSTI as DE96011832

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  • BEAMS `96: 11. international conference on high-power particle beams, Prague (Czech Republic), 10-14 Jun 1996

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  • Other: DE96011832
  • Report No.: SAND--95-3012C
  • Report No.: CONF-960610--4
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/211368 | External Link
  • Office of Scientific & Technical Information Report Number: 242772
  • Archival Resource Key: ark:/67531/metadc668525

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  • June 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • April 14, 2016, 8:17 p.m.

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Sanford, T.W.L.; Mosher, D. & De Groot, J.S. X-ray emission from a high-atomic-number z-pinch plasma created from compact wire arrays, article, June 1, 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc668525/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.