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Proceedings Paper

High-energy x-ray imaging diagnostics of nanosecond pulse accelerators
Author(s): Graham W. Smith; Robert J. Hohlfelder; Alun J. Tribe; David E. Beutler; Roque R. Gallegos; Calvin L. G. Seymour; Jon A. Thompson
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Paper Abstract

X-ray imaging has been undertaken on Sandia National Laboratories' radiation effects x-ray simulators. These simulators typically yield a single very short (<20ns) pulse of high-energy (MeV endpoint energy bremsstrahlung) x-ray radiation with doses in the kilorad (krad (Si)) region. X-ray source targets vary in size from 2 to 25cm diameter, dependent upon the particular simulator. Electronic imaging of the source x-ray emission under dynamic conditions yields valuable information upon how the simulator is performing. The resultant images are of interest to the simulator designer who may configure new x-ray source converter targets and diode designs. The images can provide quantitative information about machine performance during radiation effects testing of components under active conditions. The effects testing program is a valuable interface for validation of high performance computer codes and models for the radiation effects community. A novel high-energy x-ray imaging spectrometer is described whereby the spectral energy (0.5 to 1.8MeV) profile may be discerned from the digitally recorded and viewable images via a pinhole/scintillator/CCD imaging system and knowledge of the filtration parameters. Unique images, analysis and an evaluation of the capability of the spectrometer are presented.

Paper Details

Date Published: 11 January 2007
PDF: 12 pages
Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 627905 (11 January 2007); doi: 10.1117/12.725055
Show Author Affiliations
Graham W. Smith, Atomic Weapons Establishment (United Kingdom)
Robert J. Hohlfelder, Sandia National Labs. (United States)
Alun J. Tribe, Atomic Weapons Establishment (United Kingdom)
David E. Beutler, Sandia National Labs. (United States)
Roque R. Gallegos, Sandia National Labs. (United States)
Calvin L. G. Seymour, Atomic Weapons Establishment (United Kingdom)
Jon A. Thompson, Atomic Weapons Establishment (United Kingdom)

Published in SPIE Proceedings Vol. 6279:
27th International Congress on High-Speed Photography and Photonics
Xun Hou; Wei Zhao; Baoli Yao, Editor(s)

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