High-resolution x-ray radiography with Fresnel zone plates on the University of Rochester's OMEGA Laser Systems
| Autor: | Chad Mileham, Brett Scheiner, Christian Stoeckl, Mark J. Schmitt, P. M. Nilson, F. J. Marshall, J. J. Ruby, S. T. Ivancic |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Framing (visual arts) Fresnel zone Materials science business.industry Resolution (electron density) Zone plate Laser 01 natural sciences 010305 fluids & plasmas law.invention Optics law 0103 physical sciences Photonics business Instrumentation Image resolution Laboratory for Laser Energetics |
| Zdroj: | The Review of scientific instruments. 92(3) |
| ISSN: | 1089-7623 |
| Popis: | Experiments performed at the Laboratory for Laser Energetics with a continuous-wave (cw) x-ray source and on the OMEGA and OMEGA EP Laser Systems [Boehly et al., Opt. Commun. 133, 495 (1997) and Waxer et al., Opt. Photonics News 16, 30 (2005)] have utilized a Fresnel zone plate (FZP) to obtain x-ray images with a spatial resolution as small as ∼1.5 μm. Such FZP images were obtained with a charge-coupled device or a framing camera at energies ranging from 4.5 keV to 6.7 keV using x-ray line emission from both the cw source and high-intensity, laser-beam–illuminated metal foils. In all cases, the resolution test results are determined from patterns and grids backlit by these sources. The resolutions obtained are shown to be due to a combination of the spectral content of the x-ray sources and detector resolution limited by the magnification of the images (14× to 22×). High-speed framing cameras were used to obtain FZP images with frame times as short as ∼30 ps. Double-shell implosions on OMEGA were backlit by laser-irradiated Fe foils, thus obtaining a framing-camera–limited, FZP-image resolution of ∼3 μm–4 μm. |
| Databáze: | OpenAIRE |
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