Uniformity of the soft-x-ray emissions from gold foils irradiated by OMEGA laser beams determined by a two-mirror normal-incidence microscope with multilayer coatings
- E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, D.C. 20375-5352 (United States)
A two-mirror normal-incidence microscope with multilayer coatings was used to image the soft-x-ray emissions from planar foils irradiated by OMEGA laser beams. The bandpass of the multilayer coatings was centered at a wavelength of 48.3 {Angstrom} (257-eV energy) and was 0.5 {Angstrom} wide. Five overlapping OMEGA beams, without beam smoothing, were typically incident on the gold foils. The total energy was 1500 J, and the focused intensity was 6{times}10{sup 13} Wcm{sup {minus}2}. The 5.8{times} magnified images were recorded by a gated framing camera at various times during the 3-ns laser pulse. A pinhole camera imaged the x-ray emission in the energy range of {gt}2 keV. On a spatial scale of 10 {mu}m, it was found that the soft-x-ray images at 257 eV were quite uniform and featureless. In contrast, the hard-x-ray images in the energy range of {gt}2 kev were highly nonuniform with numerous features of size 150 {mu}m. {copyright} 1998 Optical Society of America
- Research Organization:
- Univ. of Rochester, NY (United States)
- DOE Contract Number:
- FC03-92SF19460
- OSTI ID:
- 678744
- Journal Information:
- Applied Optics, Vol. 37, Issue 7; Other Information: PBD: Mar 1998
- Country of Publication:
- United States
- Language:
- English
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