TIME RESOLVED X-RAY SPOT DIAGNOSTIC

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A diagnostic was developed for the determination of temporal history of an X-ray spot. A pair of thin (0.5 mm) slits image the x-ray spot to a fast scintillator which is coupled to a fast detector, thus sampling a slice of the X-Ray spot. Two other scintillator/detectors are used to determine the position of the spot and total forward dose. The slit signal is normalized to the dose and the resulting signal is analyzed to get the spot size. The position information is used to compensate for small changes due to spot motion and misalignment. The time resolution of the ... continued below

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Richardson, R; Guethlein, G; Falabella, S; Chambers, F; Raymond, B & Weir, J April 26, 2005.

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Description

A diagnostic was developed for the determination of temporal history of an X-ray spot. A pair of thin (0.5 mm) slits image the x-ray spot to a fast scintillator which is coupled to a fast detector, thus sampling a slice of the X-Ray spot. Two other scintillator/detectors are used to determine the position of the spot and total forward dose. The slit signal is normalized to the dose and the resulting signal is analyzed to get the spot size. The position information is used to compensate for small changes due to spot motion and misalignment. The time resolution of the diagnostic is about 1 ns and measures spots from 0.5 mm to over 3 mm. The theory and equations used to calculate spot size and position are presented, as well as data. The calculations assume a symmetric, Gaussian spot. The spot data is generated by the ETA II accelerator, a 2kA, 5.5 MeV, 60 ns electron beam focused on a Tantalum target. The spot generated is typically about 1 mm FWHM. Comparisons are made to an X-ray pinhole camera which images the X-Ray spot (in 2D) at four time slices.

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PDF-file: 6 pages; size: 0.6 Mbytes

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  • Presented at: 2005 Particle Accelerator Conference, Knoxville, TN, United States, May 16 - May 20, 2005

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  • Report No.: UCRL-CONF-212089
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 883576
  • Archival Resource Key: ark:/67531/metadc892135

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • April 26, 2005

Added to The UNT Digital Library

  • Sept. 23, 2016, 2:42 p.m.

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  • Dec. 7, 2016, 11:12 p.m.

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Richardson, R; Guethlein, G; Falabella, S; Chambers, F; Raymond, B & Weir, J. TIME RESOLVED X-RAY SPOT DIAGNOSTIC, article, April 26, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc892135/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.