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Persistent URL http://purl.org/net/epubs/work/37278
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Record Id 37278
Title High-energy K alpha radiography using high-intensity, short-pulse lasers
Contributors
Abstract The characteristics of 22-40 keV K alpha x-ray sources are measured. These high-energy sources are produced by 100 TW and petawatt high-intensity lasers and will be used to develop and implement workable radiography solutions to probe high-Z and dense materials for the high-energy density experiments. The measurements show that the K alpha source size from a simple foil target is larger than 60 mu m, too large for most radiography applications. 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. One-dimensional radiography experiments using small-edge-on foils resolved 10 mu m features with high contrast. Experiments were performed to test a variety of small volume two-dimensional point sources such as cones, wires, and embedded wires, measured photon yields, and compared the measurements with predictions from hybrid-particle-in-cell simulations. In addition to high-energy, high-resolution backlighters, future experiments will also need imaging detectors and diagnostic tools that are workable in the high-energy range. An initial look at some of these detector issues is also presented. (c) 2006 American Institute of Physics.
Organisation CCLRC , CLF
Keywords EFFICIENCY , SPECTROSCOPY , OPTIMIZATION , TRANSPORT , HOT-ELECTRONS , PETAWATT , TARGET INTERACTION , PLASMA INTERACTIONS , NATIONAL IGNITION FACILITY , X-RAY-EMISSION , CLF 2006-2007
Funding Information
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Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article Phys Plasmas 13, no. 5 (2006): 056309. doi:10.1063/1.2178775 2006
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