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

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) ; Leckbee, Joshua J.

Sandia National Laboratories

关键词: Transformers;    Flash X Ray Machines;    43 Particle Accelerators;    Nevada Test Site;    X-Ray Radiography Flash Radiography.;   

DOI  :  10.2172/940903
RP-ID  :  SAND2008-6142
RP-ID  :  AC04-94AL85000
RP-ID  :  940903

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.