X-ray Induced Pinhole Closure in Point Projection X-ray Radiography

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In pinhole-assisted point-projection x-ray radiography (or ''backlighting''), pinholes are placed between the sample of interest and an x-ray source (or ''backlighter'') to effectively limit the source size and hence improve the spatial resolution of the system. Pinholes are generally placed close to such x-ray backlighters to increase the field-of-view, leading to possible vaporization and pinhole closure due to x-ray driven ablation, thereby potentially limiting the usefulness of this method. An experimental study and modeling of time-dependent closure and resolution is presented. The pinhole closure timescale is studied for various pinhole sizes, pinhole to backlighter separations and filtering conditions. In addition ... continued below

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PDF-file: 34 pages; size: 0.2 Mbytes

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Bullock, A B; Landen, O L; Blue, B E; Edwards, J & Bradley, D K January 13, 2006.

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In pinhole-assisted point-projection x-ray radiography (or ''backlighting''), pinholes are placed between the sample of interest and an x-ray source (or ''backlighter'') to effectively limit the source size and hence improve the spatial resolution of the system. Pinholes are generally placed close to such x-ray backlighters to increase the field-of-view, leading to possible vaporization and pinhole closure due to x-ray driven ablation, thereby potentially limiting the usefulness of this method. An experimental study and modeling of time-dependent closure and resolution is presented. The pinhole closure timescale is studied for various pinhole sizes, pinhole to backlighter separations and filtering conditions. In addition the time-dependent resolution is extracted from one-dimensional wire imaging prior to pinhole closure. Cylindrical hydrodynamic modeling of the pinhole closure shows reasonable agreement with data, giving us a predictive capability for pinhole closure in future experiments.

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PDF-file: 34 pages; size: 0.2 Mbytes

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  • Journal Name: Journal of Applied Physics, vol. 100, no. 4, August 15, 2006, pp. 043301

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  • Report No.: UCRL-JRNL-218415
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 898453
  • Archival Resource Key: ark:/67531/metadc882309

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 13, 2006

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 9, 2016, 9 p.m.

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Bullock, A B; Landen, O L; Blue, B E; Edwards, J & Bradley, D K. X-ray Induced Pinhole Closure in Point Projection X-ray Radiography, article, January 13, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc882309/: accessed January 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.