Bremsstrahlung emission from high power laser interactions with constrained targets for industrial radiography

C. D. Armstrong*, C. M. Brenner, C. Jones, D. R. Rusby, Z. E. Davidson, J. Wragg, S. Richards, C. Spindloe, P. Oliveira, M. Notley, R. Clarke, S. R. Mirfayzi, S. Kar, Y. Li, T. Scott, P. Mckenna, D. Neely

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
26 Downloads (Pure)

Abstract

Laser-solid interactions are highly suited as a potential source of high energy X-rays for nondestructive imaging. A bright, energetic X-ray pulse can be driven from a small source, making it ideal for high resolution X-ray radiography. By limiting the lateral dimensions of the target we are able to confine the region over which X-rays are produced, enabling imaging with enhanced resolution and contrast. Using constrained targets we demonstrate experimentally a X-ray source, improving the image quality compared to unconstrained foil targets. Modelling demonstrates that a larger sheath field envelope around the perimeter of the constrained targets increases the proportion of electron current that recirculates through the target, driving a brighter source of X-rays.

Original languageEnglish
Article numbere24
JournalHigh Power Laser Science and Engineering
Early online date19 Apr 2019
DOIs
Publication statusEarly online date - 19 Apr 2019

Keywords

  • bremsstrahlung
  • high power laser
  • nondestructive imaging
  • radiography
  • X-ray

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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