Title :
Computational and experimental studies of the beam-target interaction for high-dose, multi-pulse radiography
Author :
DeVolder, B.G. ; Kwan, Thomas J. T. ; Fulton, R.D. ; Moir, D.C. ; Ore, D.M. ; Prono, D.S.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
Summary form only given. The conversion of an intense relativistic electron beam into X-rays for radiographic imaging is achieved through the bremsstrahlung process of electrons in a target of optimal thickness. To achieve desirable resolution for thick objects, an extremely high-brightness electron beam is used, and a significant amount of beam energy can be deposited in a small area of the target. Vaporization of the target material and expansion of the resultant plasma can occur. In a multi-pulsing design, which will resolve the dynamic behavior of the object, the expanding plasma can have an effect on the quality of subsequent electron beam pulses. The evolution of the plasma was investigated using a two-dimensional Eulerian magnetohydrodynamic code.
Keywords :
X-ray imaging; X-ray production; beam handling techniques; bremsstrahlung; electron beam applications; electron beams; plasma magnetohydrodynamics; plasma production; plasma-beam interactions; radiography; 20 MeV; 3.8 kA; 4.5 kA; 5.25 MeV; X-rays; beam energy; beam-target interactio; bremsstrahlung process; dynamic behavior; electron beam pulses; expanding plasma; high-brightness electron beam; high-dose multi-pulse radiography; intense relativistic electron beam; multi-pulsing design; optimal thickness; radiographic imaging; resolution; resultant plasma; target; thick objects; two-dimensional Eulerian magnetohydrodynamic code; Electron beams; Energy resolution; High-resolution imaging; Laboratories; Magnetic materials; Optical imaging; Plasma materials processing; Plasma measurements; Radiography; X-rays;
Conference_Titel :
Plasma Science, 1997. IEEE Conference Record - Abstracts., 1997 IEEE International Conference on
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-3990-8
DOI :
10.1109/PLASMA.1997.605241