Characterization of x-ray lens for use in probing high energy density states of matter

P. Mabey*, N. J. Hartley, H. W. Doyle, J. E. Cross, L. Ceurvorst, A. Savin, A. Rigby, M. Oliver, M. Calvert, I. J. Kim, D. Riley, P. A. Norreys, C. H. Nam, D. C. Carroll, C. Spindloe, G. Gregori

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

By using polycapillary lenses to focus laser-produced x-ray sources to high intensities, an improvement in signal-to-noise ratio can be achieved. Here the He-alpha line emission produced by driving a titanium backlighter target is focused by a polycapillary lens and the output characterized. The x-ray spot is measured to have a peak intensity of 4.5 x 10(7) photons, with a total photon count of 8.8 x 10(8) in 0.13 +/- 0.01 mm(2). This setup is equivalent to placing the backlighter target 3 mm from the sample with a 600 mu m diameter pinhole. The polycapillary lens enables the placement of the backlighter target at a much larger distance from the sample to be studied and therefore has the ability to greatly improve the signal-to-noise ratio on detectors. We demonstrate this with two simple diffraction experiments using pyrolytic graphite and polycrystalline aluminium.

Original languageEnglish
Article number04010
Number of pages10
JournalJournal of Instrumentation
Volume10
DOIs
Publication statusPublished - 24 Apr 2015

Keywords

  • Plasma diagnostics - probes
  • Plasma generation (laser-produced, RF, x ray-produced)
  • Plasma diagnostics - interferometry, spectroscopy and imaging
  • PLASMA
  • IGNITION
  • PULSES

Cite this

Mabey, P., Hartley, N. J., Doyle, H. W., Cross, J. E., Ceurvorst, L., Savin, A., Rigby, A., Oliver, M., Calvert, M., Kim, I. J., Riley, D., Norreys, P. A., Nam, C. H., Carroll, D. C., Spindloe, C., & Gregori, G. (2015). Characterization of x-ray lens for use in probing high energy density states of matter. Journal of Instrumentation, 10, [04010]. https://doi.org/10.1088/1748-0221/10/04/P04010