Magnetically-Driven Bremsstralung Targets for Multiple-Pulse X-Ray Radiography
Abstract
In high-dose multiple-pulse x-ray radiography, the energy density deposited by an electron beam pulse in the target is high enough to cause vaporization of the target material and thus the creation of a plasma channel. The outward expansion of the target plasma causes the line density of the target material to drop rapidly. As a result, the efficiency of bremsstrahlung production by subsequent electron pulses can decrease significantly due to the lack of converter material along the electron beam path. We propose a novel converter target concept which makes use of a magnetically-driven, radially imploding liner to either dynamically replenish the converter material in the plasma channel or to move new target material into the line of sight of the electron beam. Pulsed-power technology is natural for this application because its dynamic time scale (microseconds) is well matched with radiographic parameters. Hydrodynamic simulations of the liner-target implosion and the associated x-ray dose calculations will be presented.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2001
- Bibcode:
- 2001APS..DPPLP1108K