High Energy K(alpha) Radiography Using High-intensity, Short-pulse Lasers

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We have performed experiments using Callisto, the Vulcan 100 TW and the Vulcan Petawatt high intensity lasers to understand the characteristics of high energy, K{alpha} x-ray sources and to implement workable radiography solutions at 20-100 keV. Our measurements show that the K{alpha} size from a simple foil target is larger than 60 {micro}m, far larger than the experiment resolution requirement. The total K{alpha} yield is independent of target thicknesses verifying that refluxing plays a major role in photon generation. Smaller radiating volumes emit brighter K{alpha} radiation. 1-D radiography experiments using small-edge-on foils resolved 10 {micro}m features with high contrast. We ... continued below

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PDF-file: 37 pages; size: 1.3 Mbytes

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Park, H; Izumi, N; Key, M H; King, J A; Koch, J A; Landen, O L et al. November 16, 2005.

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We have performed experiments using Callisto, the Vulcan 100 TW and the Vulcan Petawatt high intensity lasers to understand the characteristics of high energy, K{alpha} x-ray sources and to implement workable radiography solutions at 20-100 keV. Our measurements show that the K{alpha} size from a simple foil target is larger than 60 {micro}m, far larger than the experiment resolution requirement. The total K{alpha} yield is independent of target thicknesses verifying that refluxing plays a major role in photon generation. Smaller radiating volumes emit brighter K{alpha} radiation. 1-D radiography experiments using small-edge-on foils resolved 10 {micro}m features with high contrast. We tested a variety of small volume 2-D point sources such as cones, wires, and embedded wires, measuring photon yields and comparing our measurements with predictions from hybrid-PIC LSP simulations. In addition to high-energy, high-resolution backlighters, future experiments will also need imaging detectors and diagnostic tools that are workable in the 20-100 keV energy range. An initial look at some of these detector issues is also presented.

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PDF-file: 37 pages; size: 1.3 Mbytes

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  • Journal Name: Physics of Plasmas, vol. 13, N/A, May 15, 2006, pp. 056309

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  • Report No.: UCRL-JRNL-217367
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 898595
  • Archival Resource Key: ark:/67531/metadc887310

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Office of Scientific & Technical Information Technical Reports

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  • November 16, 2005

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 5, 2016, 7:29 p.m.

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Park, H; Izumi, N; Key, M H; King, J A; Koch, J A; Landen, O L et al. High Energy K(alpha) Radiography Using High-intensity, Short-pulse Lasers, article, November 16, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc887310/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.