Engineering design of the Z magnetically-insulated transmission lines and insulator stack

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A 3.3 m diameter cylindrical insulator stack and a set of 3 m diameter conical magnetically insulated transmission lines (MITLs) were built for the Z accelerator. The 1.7 m tall insulator stack operates at {approx}20 MA and 2.5-3.5 MV, and was instrumented with 12 current and 24 voltage monitors. The insulator stack was concentrically and azimuthally aligned within 1.5 mm. The stack, containing 22 crosslinked polystyrene insulators and 18 grading rings, was designed to provide vertical stability for the MITLs and to resist radial buckling. 2-D and 3-D static finite element analyses (FEA) were used in designing the MITLs to ... continued below

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7 p.

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Ives, H.C.; Van De Valde, D.M.; Long, F.W. & Smith, J.W. August 1, 1997.

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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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A 3.3 m diameter cylindrical insulator stack and a set of 3 m diameter conical magnetically insulated transmission lines (MITLs) were built for the Z accelerator. The 1.7 m tall insulator stack operates at {approx}20 MA and 2.5-3.5 MV, and was instrumented with 12 current and 24 voltage monitors. The insulator stack was concentrically and azimuthally aligned within 1.5 mm. The stack, containing 22 crosslinked polystyrene insulators and 18 grading rings, was designed to provide vertical stability for the MITLs and to resist radial buckling. 2-D and 3-D static finite element analyses (FEA) were used in designing the MITLs to limit gravity deflections to less than .25 mm. 2-D FEA dynamic analyses were done to predict motion and to help design features to restrict damage. Each MITL is divided into four concentric zones which fasten together in a way which facilitates fabrication, limits the extent of possible damage and allows for future changes at minimal cost. The tapered MITLs are supported by feedthrough rings in the insulator stack so that the gaps at small radius are adjustable from 0 to 22 mm. The MITL anodes were instrumented with 24 current monitors and have 48 additional diagnostic locations available. The MITLs were fabricated from 304L stainless steel except the outer anode sections, which were made from 6061-T6 aluminum alloy. Procedures were developed for fabrication of the large and small diameter MITL cones, as well as for the feedthrough rings and grading rings of the stack. The power-flow surfaces were successfully machined to within {+-}.25 mm of the specified contours. A large, multi-trolley MITL handling system was designed to allow for removal, cleaning and replacement of the MITLs for each shot, at a shot rate of 1.5 shots/day. Additional equipment allows for cleaning of the insulators.

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7 p.

Notes

OSTI as DE97007920

Source

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

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  • Other: DE97007920
  • Report No.: SAND--97-0246C
  • Report No.: CONF-9706113--6
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 508104
  • Archival Resource Key: ark:/67531/metadc693478

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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 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • April 14, 2016, 3:46 p.m.

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Ives, H.C.; Van De Valde, D.M.; Long, F.W. & Smith, J.W. Engineering design of the Z magnetically-insulated transmission lines and insulator stack, article, August 1, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc693478/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.