Accession Number:

ADA639898

Title:

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

Descriptive Note:

Conference paper

Corporate Author:

DEFENSE THREAT REDUCTION AGENCY ALBUQUERQUE NM

Report Date:

1999-06-01

Pagination or Media Count:

5.0

Abstract:

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, COULOMB. 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 wem calculated. This paper presents the results of the COULOMB 3-D modeling, and the SCREAMER circuit-model analyses.

Subject Categories:

  • Electrical and Electronic Equipment
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE