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Measurement of fast risetime megampere currents by quartz gauge

Description: Quartz gauges have been used on the Sandia National Laboratories Proto II accelerator to measure current in the magnetically insulated transmission line at the 11 TW power level. The accelerator delivers 3.5 MA at 2 x 10/sup 14/ A/s in a 40 ns pulse to a 0.0127 m diameter aluminum liner to produce a high density plasma. At this radius and dI/dt levels, the B-dot monitors no longer function for the measurement of load current because the monitor suffers electrical breakdown. Quartz pressure gaug… more
Date: January 1, 1980
Creator: Williams, R. R.; McDaniel, D. H. & Stinnett, R. W.
Partner: UNT Libraries Government Documents Department
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Pulsed power drivers for ICF and high energy density physics

Description: Nanosecond Pulsed Power Science and Technology has its origins in the 1960s and over the past decade has matured into a flexible and robust discipline capable of addressing key physics issues of importance to ICF and high Energy Density Physics. The major leverage provided by pulsed power is its ability to generate and deliver high energy and high power at low cost and high efficiency. A low-cost, high-efficiency driver is important because of the very large capital investment required for mult… more
Date: December 31, 1995
Creator: Ramirez, J. J.; Matzen, M. K. & McDaniel, D. H.
Partner: UNT Libraries Government Documents Department
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ZX Pulsed-Power Design

Description: ZX is a new z-pinch accelerator planned as the next generation z-pinch driver at SNL, and as an intermediate step towards X-1. It is planned to drive either a single 50 MA z-pinch load, or two 25 to 30 MA z pinches. Three designs for the ZX accelerator are presented. All require 7 to 8 MV at the insulator stack to drive the z-pinch load to implosion in 100 to 120 ns. Two of the designs are based on the Z accelerator, and use water-line technology; a transit-time-isolated water adder, and a wate… more
Date: August 2, 1999
Creator: Corley, J. P.; Johnson, D. L.; McDaniel, D. H.; Spielman, R. B.; Struve, K. W. & Stygar, W. A.
Partner: UNT Libraries Government Documents Department
open access

Design and experimental results on a terawatt magnetically controlled plasma opening switch

Description: The magnetically controlled plasma opening switch (MCPOS) is an advanced plasma opening switch that utilizes magnetic fields to improve operation. Magnetic fields always dominate terawatt, pulsed power plasma opening switches. For that reason, the MCPOS uses controlled applied magnetic fields with magnitude comparable to the self-magnetic field of the storage inductor. One applied field holds the plasma in place while energy accumulates in the storage inductor, then another applied field pushes… more
Date: May 1, 1998
Creator: Savage, M. E.; Simpson, W. W.; Mendel Jr., C. W.; McDaniel, D. H.; Levine, J. S. & Tucker, T. S.
Partner: UNT Libraries Government Documents Department
open access

Z: A Fast Pulsed Power Generator for Ultra-High Magnetic Field Generation

Description: Advances in fast, pulsed-power technologies have resulted in the development of very high current drivers that have current rise times - 100 ns. The largest such pulsed power drive r today is the new Z accelerator located at Sandia National Laboratories in Albuquerque, New Mexico. Z is capable of delivering more than 20 MA with a time-to-peak of 105 ns to low inductance (- 1 nH)loads. Such large drivers are capable of directly generating magnetic fields approaching 3 kT in small, 1 -cm3, volume… more
Date: November 4, 1998
Creator: Asay, J. R.; Bailey, J. E.; Bernard, M. A.; Hall, C. A.; McDaniel, D. H.; Spielman, R. B. et al.
Partner: UNT Libraries Government Documents Department
open access

Isentropic Compression of Iron with the Z Accelerator

Description: Development of isentropic loading techniques is a long standing goal of the shock physics community. The authors have used the Sandia Z Accelerator to produce smoothly increasing pressure loading on planar iron specimens over time durations of 100 ns and for pressures to 300 Mbar. Free surface velocity measurements on the rear surface of the continuously loaded specimens were made on specimens 0.5-mm and 0.8-mm thick and clearly show the effects of wave evolution into the well known two-wave st… more
Date: June 10, 1999
Creator: Asay, J. R.; Bernard, M. A.; Hall, C. A.; Hayes, D. B.; Holland, K. G.; McDaniel, D. H. et al.
Partner: UNT Libraries Government Documents Department
open access

Use of Z-Pinch Techniques for Equation of State Applications

Description: A principal goal of the shock physics program at Sandia is to establish a capability to make accurate equation of state (EOS) measurements on the Z pulsed radiation source. The Z accelerator is a source of intense x-ray radiation, which can be used to drive ablative shocks for EOS studies. With this source, ablative multi shocks can be produced to study materials over the range of interest to both weapons and ICF physics programs. In developing the capability to diagnose these types of studies … more
Date: November 11, 1998
Creator: Asay, J. R.; Bernard, M. A.; Clark, B.; Fleming, K. J.; Hall, C. A.; Hauer, A. et al.
Partner: UNT Libraries Government Documents Department
open access

Equation-of-State Measurements with Z-Pinch Sources

Description: Validation of material models in a variety of scientific and technological applications requires accurate data regarding the high-pressure thermodynamic and mechanical properties. Traditional laboratory techniques for striking these measurements involve light gas guns to generate the required thermodynamic states, and the use of high-resolution time-resolved diagnostics to measure the desired material properties. EOS and constitutive material properties of importance to modeling needs include h… more
Date: July 22, 1999
Creator: Asay, J. R.; Hall, C.; Bailey, J. E.; Knudson, M. D.; Holland, K. G.; Hanson, D. L. et al.
Partner: UNT Libraries Government Documents Department
open access

Light ion sources and target results on PBFA II (Particle Beam Fusion Accelerator II)

Description: Advances in ion beam theory, diagnostics, and experiments in the past two years have enabled efficient generation of intense proton beams on PBFA II, and focusing of the beam power to 5.4 TW/cm{sup 2} on a 6-mm-diameter target. Target experiments have been started with the intense proton beams, since the range of protons at 4--5 MeV is equivalent to that of lithium at 30 MeV. Three series of experiments have been conducted using planar, conical, and cylindrical targets. These tests have provide… more
Date: January 1, 1990
Creator: Cook, D. L.; Bailey, J. E.; Bieg, K. W.; Bloomquist, D. D.; Coats, R. S.; Chandler, G. C. et al.
Partner: UNT Libraries Government Documents Department
open access

Z-Pinch Driven Inertial Confinement Fusion Target Physics Research at Sandia National Laboratories

Description: Three hohlraum concepts are being pursued at Sandia National Laboratories (SNL) to investigate the possibility of using pulsed power driven magnetic implosions (z-pinches) to drive high gain targets capable of yields in the range of 200-1000 MJ. This research is being conducted on SNL'S.Z facility that is capable of driving peak currents of 20 MA in z-pinch loads producing implosion velocities as high as 7.5X 107 cm/s, x-ray energies approaching 2 MJ, and x-ray powers exceeding 200 TW. This pap… more
Date: October 27, 1998
Creator: Alberts, T. E.; Asay, J. R.; Baca, P. M.; Baker, K. L.; Breeze, S. P.; Chandler, G. A. et al.
Partner: UNT Libraries Government Documents Department
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