X-ray induced pinhole closure in point-projection x-ray radiography

Bullock, A B; Landen, O L; Blue, B E; Edwards, J; Bradley, D K

doi:10.1063/1.2229737

Title: X-ray induced pinhole closure in point-projection x-ray radiography

Full Record
Other Related Research

Abstract

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 time scale 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.

Authors:

Bullock, A B; Landen, O L; Blue, B E; Edwards, J; Bradley, D K ^[1]

Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

Publication Date:: Tue Aug 15 00:00:00 EDT 2006

OSTI Identifier:: 20880003

Resource Type:: Journal Article

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 100; Journal Issue: 4; Other Information: DOI: 10.1063/1.2229737; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABLATION; CYLINDRICAL CONFIGURATION; LIGHT TRANSMISSION; PLASMA; SPATIAL RESOLUTION; TIME DEPENDENCE; X RADIATION; X-RAY RADIOGRAPHY; X-RAY SOURCES

Citation Formats


                    Bullock, A B, Landen, O L, Blue, B E, Edwards, J, and Bradley, D K. X-ray induced pinhole closure in point-projection x-ray radiography.  United States: N. p., 2006. 
        Web.  doi:10.1063/1.2229737.

Copy to clipboard


                    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.  United States.  https://doi.org/10.1063/1.2229737

Copy to clipboard


                    Bullock, A B, Landen, O L, Blue, B E, Edwards, J, and Bradley, D K. 2006.  
        "X-ray induced pinhole closure in point-projection x-ray radiography".  United States.  https://doi.org/10.1063/1.2229737.

Copy to clipboard


                    
@article{osti_20880003,

  title        = {X-ray induced pinhole closure in point-projection x-ray radiography},

  author       = {Bullock, A B and Landen, O L and Blue, B E and Edwards, J and Bradley, D K},

  abstractNote = {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 time scale 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.},

  doi          = {10.1063/1.2229737},

  url          = {https://www.osti.gov/biblio/20880003},
  journal      = {Journal of Applied Physics},

  issn         = {0021-8979},

  number       = 4,

  volume       = 100,

  place        = {United States},

  year         = {Tue Aug 15 00:00:00 EDT 2006},

  month        = {Tue Aug 15 00:00:00 EDT 2006}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1063/1.2229737

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

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

Journal Article Bullock, A; Landen, O; Blue, B; ... - Journal of Applied Physics, vol. 100, no. 4, August 15, 2006, pp. 043301

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 additionmore »« less
https://doi.org/10.1063/1.2229737

Full Text Available
10 (micro)m and 5 (micro)m Pinhole-Assisted Point-Projection Backlit Imaging for NIF

Conference Bullock, A; Landen, O; Bradley, D

Pinhole-assisted point-projection backlighting with 10{micro}m and 5 {micro}m pinholes placed a small distance of order 1 mm away from the backlighter produces images with large field of view and high resolution. Pinholes placed closely to high-power backlighter sources can vaporize and close due to x-ray driven ablation, thereby limiting the usefulness of this method. A study of streaked 1-D backlit imaging of 25 {micro}m W wires using the OMEGA laser is presented. The pinhole closure timescale for 10 {micro}m pinholes placed 0.45 mm and 1 mm distant from the backlighter is 1.3 ns and 2.2 ns, respectively. Similar timescales formore »« less
Full Text Available
10 and 5 {mu}m pinhole-assisted point-projection backlit imaging for the National Ignition Facility

Journal Article Bullock, A; Landen, O; Bradley, D - Review of Scientific Instruments

In pinhole-assisted point-projection backlighting, pinholes are placed a small distance (of order 1 mm) away from the backlighter source to produce images with large field of view. Pinholes placed close to high-power backlighter sources can vaporize and, if sufficiently small, close due to x-ray driven ablation, thereby potentially limiting the usefulness of this method. A study of streaked one-dimensional backlit imaging of 25 {mu}m W wires using the OMEGA laser at the University of Rochester is presented. The pinhole closure time scale for 10 {mu}m pinholes placed 0.45 and 1 mm distant from a 0.6 TW Ti backlighter is 1.3more »« less
https://doi.org/10.1063/1.1318253
Improved pinhole-apertured point-projection backlighter geometry

Journal Article Blue, B; Hansen, J; Robey, H - Review of Scientific Instruments

Pinhole-apertured point-projection x-ray radiography is an important diagnostic technique for obtaining high resolution, high contrast, and large field-of-view images used to diagnose the hydrodynamic evolution of high energy density experiments. In this technique, a pinhole aperture is placed between a laser irradiated foil (x-ray source) and an imaging detector. Future high energy density experiments that utilize more opaque materials will require backlighters with improved contrast as compared to what is currently used. In this article, we present an improved backlighter geometry that utilizes a tilted pinhole for debris mitigation and a front-side illuminated backlighter foil for improved photon statistics.
https://doi.org/10.1063/1.1787936
Improved Pinhole-Apertured Point-Projection Backlighter Geometry

Conference Blue, B; Robey, H; Hansen, J

Pinhole-apertured point-projection x-ray radiography is an important diagnostic technique for obtaining high resolution, high contrast, and large field-of-view images used to diagnose the hydrodynamic evolution of high energy density experiments. In this technique, a pinhole aperture is placed between a laser irradiated foil (x-ray source) and an imaging detector. In this letter, we present an improved backlighter geometry that utilizes a tilted pinhole for debris mitigation and a front-side illuminated backlighter foil for improved photon statistics.
https://doi.org/10.1063/1.1787936

Full Text Available

Similar Records