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Proceedings Paper

Laser-produced plasma (LPP) x-ray source with BaF2 and rare-earth targets for application in dual-energy subtraction angiography (DESA)
Author(s): Andrzej Krol; Jean-Claude Kieffer; Zhiming Jiang; Jianfan Yu; Charles C. Chamberlain; Daniel A. Bassano; Pascal Gallant
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Paper Abstract

A laser produced plasma (LPP) x-ray source utilizing ultra- fast laser was investigated in the context of its utility for dual energy subtraction angiography. Experiments were performed with a Table Top Terawatt (TTT) laser using BaF2 and rare-earth metal targets including La, Ce, Nd and Gd. The laser was operated in a single-pulse or in a dual pulse mode with surface power density in the 1018 - 1019 Wcm-2 range with pulse duration of 150 or 450 fs. Infrared and/or green beams were utilized. Hot electrons' temperature was in the 35 - 50 keV range. The obtained LPP x- ray spectra were comprised of a continuous bremsstrahlung component as well as discrete characteristic lines. The bremsstrahlung extended to high energies with no evident cutoff energy below 100 keV. Its shape was best described by exp(-E/kTe), where Te is the hot electron temperature. The overall efficiency was equal to approximately 9 X 10-4 for 450 fs pulse and approximately 6 X 10-4 for 150 fs pulses. The x-ray focal spot size was in the range 13 to 50 microns. We have found that the LPP x- ray source with BaF2 and rare-earth targets provide x-ray spectra that might be suitable for DESA.

Paper Details

Date Published: 28 May 1999
PDF: 6 pages
Proc. SPIE 3659, Medical Imaging 1999: Physics of Medical Imaging, (28 May 1999); doi: 10.1117/12.349553
Show Author Affiliations
Andrzej Krol, SUNY Health Science Ctr./Syracuse (United States)
Jean-Claude Kieffer, Univ. du Quebec (Canada)
Zhiming Jiang, Univ. du Quebec (United States)
Jianfan Yu, Univ. du Quebec (Canada)
Charles C. Chamberlain, SUNY Health Science Ctr./Syracuse (United States)
Daniel A. Bassano, SUNY Health Science Ctr./Syracuse (United States)
Pascal Gallant, Univ. du Quebec (Canada)


Published in SPIE Proceedings Vol. 3659:
Medical Imaging 1999: Physics of Medical Imaging
John M. Boone; James T. Dobbins III, Editor(s)

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