학술논문
Single-shot electron radiography using a laser–plasma accelerator.
Document Type
Article
Author
Source
Subject
*ELECTRIC field effects
*RELATIVISTIC electrons
*LASER ablation
*ACCELERATOR mass spectrometry
*ELECTRONS
*ELECTRON sources
*MAGNIFICATION (Optics)
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Language
ISSN
2045-2322
Abstract
Contact and projection electron radiography of static targets was demonstrated using a laser–plasma accelerator driven by a kilojoule, picosecond-class laser as a source of relativistic electrons with an average energy of 20 MeV. Objects with areal densities as high as 7.7 g/cm2 were probed in materials ranging from plastic to tungsten, and radiographs with resolution as good as 90 μm were produced. The effects of electric fields produced by the laser ablation of the radiography objects were observed and are well described by an analytic expression relating imaging magnification change to electric-field strength. [ABSTRACT FROM AUTHOR]