Switch evaluation test system for the National Ignition Facility

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Description

Flashlamp pumped lasers use pulsed power switches to commute energy stored in capacitor banks to the flashlamps. The particular application in which the authors are interested is the National Ignition Facility (NIF), being designed by Lawrence Livermore National Laboratory, Los Alamos National Laboratory, and Sandia National Laboratories (SNL). To lower the total cost of these switches, SNL has a research program to evaluate large closing switches. The target value of the energy switched by a single device is 1.6 MJ, from a 6 mF, 24kV capacitor bank. The peak current is 500 kA. The lifetime of the NIF facility is ... continued below

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7 p.

Creation Information

Savage, M.E.; Simpson, W.W.; Sharpe, R.A. & Reynolds, F.D. July 1, 1997.

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Authors

  • Savage, M.E.
  • Simpson, W.W. Sandia National Labs., Albuquerque, NM (United States). High Energy Plasma Physics Dept.
  • Sharpe, R.A. Sandia National Labs., Albuquerque, NM (United States). High Energy Plasma Physics Dept.
  • Reynolds, F.D. Sandia National Labs., Albuquerque, NM (United States). High Energy Plasma Physics Dept.

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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

Flashlamp pumped lasers use pulsed power switches to commute energy stored in capacitor banks to the flashlamps. The particular application in which the authors are interested is the National Ignition Facility (NIF), being designed by Lawrence Livermore National Laboratory, Los Alamos National Laboratory, and Sandia National Laboratories (SNL). To lower the total cost of these switches, SNL has a research program to evaluate large closing switches. The target value of the energy switched by a single device is 1.6 MJ, from a 6 mF, 24kV capacitor bank. The peak current is 500 kA. The lifetime of the NIF facility is 24,000 shots. There is no switch today proven at these parameters. Several short-lived switches (100`s of shots) exist that can handle the voltage and current, but would require maintenance during the facility life. Other type devices, notably ignitrons, have published lifetimes in excess of 20,000 shots, but at lower currents and shorter pulse widths. The goal of the experiments at SNL is to test switches with the full NIF wave shape, and at the correct voltage. The SNL facility can provide over 500 kA at 24 kV charge voltage. the facility has 6.4 mF total capacitance, arranged in 25 sub-modules. the modular design makes the facility more flexible (for possible testing at lower current) and safer. For pulse shaping (the NIF wave shape is critically damped) there is an inductor and resistor for each of the 25 modules. Rather than one large inductor and resistor, this lowers the current in the pulse shaping components, and raises their value to those more easily attained with lumped inductors and resistors. The authors show the design of the facility, and show results from testing conducted thus far. They also show details of the testing plan for high current switches.

Physical Description

7 p.

Notes

INIS; OSTI as DE97006872

Source

  • 11. IEEE international pulsed power conference, Baltimore, MD (United States), 29 Jun - 2 Jul 1997

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  • Other: DE97006872
  • Report No.: SAND--97-1474C
  • Report No.: CONF-9706113--2
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 505389
  • Archival Resource Key: ark:/67531/metadc697652

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

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Creation Date

  • July 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

Description Last Updated

  • April 14, 2016, 8:50 p.m.

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Savage, M.E.; Simpson, W.W.; Sharpe, R.A. & Reynolds, F.D. Switch evaluation test system for the National Ignition Facility, article, July 1, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc697652/: accessed November 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.