Design of a 7-MV Linear Transformer Driver (LTD) for down-hole flash x-ray radiography.

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Description

Pulsed power driven flash x-ray radiography is a valuable diagnostic for subcritical experiments at the Nevada Test Site. The existing dual-axis Cygnus system produces images using a 2.25 MV electron beam diode to produce intense x-rays from a small source. Future hydrodynamic experiments will likely use objects with higher areal mass, requiring increased x-ray dose and higher voltages while maintaining small source spot size. A linear transformer driver (LTD) is a compact pulsed power technology with applications ranging from pulsed power flash x-ray radiography to high current Z-pinch accelerators. This report describes the design of a 7-MV dual-axis system that ... continued below

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35 p.

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Cordova, Steve Ray; Welch, Dale Robert (Voss Scientific, Albuquerque, NM); Oliver, Bryan Velten; Rose, David Vincent (Voss Scientific, Albuquerque, NM); Johnson, David Lee (L-3 Communications - Pulse Sciences, San Leandro, CA); Bruner, Nichelle Lee (Voss Scientific, Albuquerque, NM) et al. September 1, 2008.

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Description

Pulsed power driven flash x-ray radiography is a valuable diagnostic for subcritical experiments at the Nevada Test Site. The existing dual-axis Cygnus system produces images using a 2.25 MV electron beam diode to produce intense x-rays from a small source. Future hydrodynamic experiments will likely use objects with higher areal mass, requiring increased x-ray dose and higher voltages while maintaining small source spot size. A linear transformer driver (LTD) is a compact pulsed power technology with applications ranging from pulsed power flash x-ray radiography to high current Z-pinch accelerators. This report describes the design of a 7-MV dual-axis system that occupies the same lab space as the Cygnus accelerators. The work builds on a design proposed in a previous report [1]. This new design provides increased diode voltage from a lower impedance accelerator to improve coupling to low impedance diodes such as the self magnetic pinch (SMP) diode. The design also improves the predicted reliability by operating at a lower charge voltage and removing components that have proven vulnerable to failure. Simulations of the new design and experimental results of the 1-MV prototype are presented.

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35 p.

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  • Report No.: SAND2008-6142
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/940903 | External Link
  • Office of Scientific & Technical Information Report Number: 940903
  • Archival Resource Key: ark:/67531/metadc897183

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Office of Scientific & Technical Information Technical Reports

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  • September 1, 2008

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 7, 2016, 10:28 a.m.

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Cordova, Steve Ray; Welch, Dale Robert (Voss Scientific, Albuquerque, NM); Oliver, Bryan Velten; Rose, David Vincent (Voss Scientific, Albuquerque, NM); Johnson, David Lee (L-3 Communications - Pulse Sciences, San Leandro, CA); Bruner, Nichelle Lee (Voss Scientific, Albuquerque, NM) et al. Design of a 7-MV Linear Transformer Driver (LTD) for down-hole flash x-ray radiography., report, September 1, 2008; United States. (digital.library.unt.edu/ark:/67531/metadc897183/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.