Investigation of the Effects of Waterline Switch Capacitance on the Electrical Prepulse of the Z-Accelerator

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The Z-accelerator at the Sandia National Laboratories (SNL) was modified in 1996 to deliver a 20 MA pulse to a z-pinch load in 100 ns. The pulsed-power driver is a 36-module waterline accelerator. Each waterline contains four self-break switches as part of the pulse-forming section. A study was conducted to investigate the effects of increasing the capacitance of the waterline switches on the shape of the electrical prepulse at the load. Past studies have shown that increasing the prepulse at the z-pinch load increases the x-ray output power. In this study, one set of switches with its surrounding waterline hardware ... continued below

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4 p.

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Shoup, R.W.; Spielman, R.B.; Struve, K.W. & Stygar, W.A. August 2, 1999.

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

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Description

The Z-accelerator at the Sandia National Laboratories (SNL) was modified in 1996 to deliver a 20 MA pulse to a z-pinch load in 100 ns. The pulsed-power driver is a 36-module waterline accelerator. Each waterline contains four self-break switches as part of the pulse-forming section. A study was conducted to investigate the effects of increasing the capacitance of the waterline switches on the shape of the electrical prepulse at the load. Past studies have shown that increasing the prepulse at the z-pinch load increases the x-ray output power. In this study, one set of switches with its surrounding waterline hardware was modeled in 3-D and capacitance calculated using the electrostatic code, COULOME. The capacitance values were used in a SCREAMER model of the Z-accelerator. SCREAMER an SNL developed, lumped-element circuit code was used to calculate the time-dependent current waveforms delivered to the z-pinch load. The design was changed and a new capacitance matrix and output waveforms were calculated. This paper presents the results of the COULOMB 3-D modeling, and the SCREAMER circuit-model analyses.

Physical Description

4 p.

Notes

INIS; OSTI as DE00009681

Medium: P; Size: 4 pages

Source

  • 12th IEEE Pulsed Power Conference, Monterey, CA (US), 06/27/1999--06/30/1999

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  • Report No.: SAND99-1986C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 9681
  • Archival Resource Key: ark:/67531/metadc794266

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • August 2, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

Description Last Updated

  • April 10, 2017, 8:13 p.m.

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Shoup, R.W.; Spielman, R.B.; Struve, K.W. & Stygar, W.A. Investigation of the Effects of Waterline Switch Capacitance on the Electrical Prepulse of the Z-Accelerator, article, August 2, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc794266/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.