Proceedings ArticleDOI
Design options for a pulsed-power upgrade of the Z accelerator
Kenneth W. Struve,J.P. Corley,D.L. Johnson,H.C. Harjes,Dillon H. McDaniel,R.W. Shoup,David L. Smith,William A. Stygar,E.A. Weinbrecht +8 more
- Vol. 1, pp 569-572
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TLDR
In this article, the authors proposed an extensive modification of the Z accelerator at Sandia National Laboratories to both increase the current and radiative power, and to improve the facility, diagnostics, and shot rate.Abstract:
We are presently considering an extensive modification of the Z accelerator at the Sandia National Laboratories to both increase the current and radiative power, and to improve the facility, diagnostics, and shot rate. Record-breaking peak x-ray powers and Hohlraum temperatures achieved in z-pinch experiments on this machine motivate this effort. The electrical design goal of the upgrade is to drive a 40-mm diameter, 20-mm long wire-array z-pinch load with a peak current of 26 MA with a 100-ns implosion. Several changes to the pulsed-power design of Z are being considered. They are to increase the energy and lower the inductance of the Marx bank, increase the capacitance of the intermediate-store water capacitor, increase the voltage hold-off capability of the laser-triggered gas switch, lengthen the first section of the water pulse-forming line, remove impedance mismatches in the pulse-forming line, and adjust field grading on the water side of the insulator stack. With these changes Z will be able to provide peak currents greater than 26 MA, and x-ray energies exceeding 2.7 MJ. We plan to use the existing oil and water tanks, use the existing insulator stack and MITL's, and as much of the existing Marx-bank hardware as feasible. Circuit-code calculations for one design option are shown. The results of these simulations, when applied to standard water-breakdown criteria, are used to determine the size of the intermediate store (IS) and pulse-forming-line (PFL) components. We also indicate where further component development is needed.read more
Citations
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Journal ArticleDOI
Optical and pressure diagnostics of 4-MV water switches in the Z-20 test Facility
Joseph Ray Woodworth,Jane M. Lehr,Juan M. Elizondo-Decanini,Paul A. Miller,P. Wakeland,M. Kincy,J. Garde,B. Aragon,William E. Fowler,G. R. Mowrer,J.E. Maenchen,G. S. Sarkisov,J.P. Corley,K.C. Hodge,S.A. Drennan,D. Guthrie,M. Navarro,D.L. Johnson,H. C. Ives,M.J. Slattery,D.A. Muirhead +20 more
TL;DR: In this article, the behavior of self-breaking, high-voltage water switches for the Z refurbishment project was studied, and the authors observed four distinct phases in the closure of the water switches that depend on the macroscopic electric fields in the water.
Journal ArticleDOI
Experimental study of the multichanneling self-break section of the rimfire switch
TL;DR: In this paper, a study of the multichanneling section of the Rimfire switch is presented, and an objective curve fitting method is utilized to deduce switch inductance from the measured data.
Journal ArticleDOI
Pulse power for future and past X-ray simulators
Ian E. M. Smith,P. Corcoran,A.R. Miller,V. Carboni,Peter Sincerny,Phil Spence,C. Gilbert,W. Rix,Eduardo Waisman,L. Schlitt,D. Bell +10 more
TL;DR: In this article, the authors presented a point-based pulse-power driver for 100-ns and 250-ns Z-pinches that is predicted to produce 400kJ of 13-keV krypton K-shell radiation.
Journal ArticleDOI
Modeling and analysis of the rimfire gas switch
TL;DR: In this paper, an advanced circuit model of the Rimfire switch is presented along with comparisons to past models and experimental results and the development of the model is shown along with comparison with past models.
Proceedings ArticleDOI
Modeling 6 MV gas switches for the ZR accelerator
S.E. Rosenthal,J.M. Elizondo,J.E. Maenchen,Kenneth W. Struve,Dillon H. McDaniel,J.P. Corley,D.L. Johnson,Bryan V. Oliver +7 more
TL;DR: The "rimfire" gas switch Bloomquist, DD. et al. as discussed by the authors, developed at Sandia National Laboratories, presently operates both in Hermes III (in oil with peak voltage of 2.5 MV) and in Z (in water at 4.8 MV).
References
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Book ChapterDOI
Fast Pulse Vacuum Flashover
TL;DR: In this article, a re-analysis of the flashover data was carried out on perspex (i.e. lucite) at about 45°, where it withstands the maximum gradient.
Proceedings ArticleDOI
Operation of a five-stage 40000-cm 2 -area insulator stack at 158 kV/cm
William A. Stygar,R. B. Spielman,R. A. Anderson,R. E. Clark,J. W. Douglas,T. L. Gilliland,M.L. Horry,Thomas Patrick Hughes,H. C. Ives,F. W. Long,T.H. Martin,Dillon H. McDaniel,O. Milton,M.A. Mostrom,J. F. Seamen,R.W. Shoup,J.W. Smith,Kenneth W. Struve,G. E. Vogtlin,T. C. Wagoner,Osamu Yamamoto +20 more
TL;DR: In this paper, a 3.35m-diameter Rexolite insulator stack was operated at 158 kV/cm with no total stack flashovers on five consecutive Z-accelerator shots.