Inductive Voltage Adder Driven X-Ray Sources for Hydrodynamic Radiography

Conference · Thu Jun 17 00:00:00 EDT 1999

OSTI ID:7873

Bailey, V ^[1]; Cordova, S; Droemer, D; Gustwiller, J; Hunt, E; Johnson, D L; MacLeod, G; Maenchen, John; Menge, P; Molina, I; Oliver, B; Olson, C; Rosenthal, S; Rovang, D; Smith, I; Welch, D; Woo, L

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1. Sandia National Laboratories

Inductive Voltage Adder (IVA) accelerators were developed to provide high-current (100s of kA) power pulses at high voltage (up to 20 MV) using robust modular components. This architecture simultaneously resolves problems found in conventional pulsed and linear induction accelerators. A variety of high-brightness pulsed x-ray radiographic sources are needed from sub-megavolt to 16-MeV endpoints with greater source brightness (dose/spot) than presently available. We are applying IVA systems to produce very intense (up to 75 TW/cm{sup 2}) electron beams for these flash radiographic applications. The accelerator electromagnetic pulse is converted to a directed electron beam at the end of a self-magnetically insulated vacuum transmission line. The cantilevered cathode threading the accelerator cavities terminates in a small (1-mm diameter) needle, producing the electron beam which is transported to a grounded bremsstrahlung converter within a strong ({approximately}50-T) axial magnetic field. These systems produce mm-sized stable electron beams, yielding very intense x-ray sources. Detailed simulations of the electron beam generation, transport, and target interaction are presented along with scaling laws for the radiation production and x-ray spot size. Experimental studies confirm these simulations and show this reliable, compact, and inexpensive technology scales to 1000-R doses a meter from a mm-diameter source in 50 ns.

• Research Organization: Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 7873
• Report Number(s): SAND98-2814C
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATOR FACILITIES
ELECTROMAGNETIC PULSES
ELECTRON BEAMS
INDUSTRIAL RADIOGRAPHY
MAGNETIC FIELDS
SCALING LAWS
X-RAY SOURCES