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TL;DR: Sculpting for centerline small-signal gains of 10(4) is demonstrated, producing amplified pulses that have both sufficient bandwidths for on-target beam smoothing and temporal profiles that have no potentially damaging AM.
Abstract: Amplification of broadband frequency-modulated (FM) pulses in high-efficiency materials such as ytterbium-doped strontium fluorapatite results in significant gain narrowing, leading to reduced on-target bandwidths for beam smoothing and to conversion from frequency modulation to amplitude modulation (AM). To compensate for these effects, we have applied precision spectral sculpting, requiring both amplitude and phase shaping, to the amplification of broadband FM pulses in narrow-band gain media. We have demonstrated sculpting for centerline small-signal gains of 104, producing amplified pulses that have both sufficient bandwidths for on-target beam smoothing and temporal profiles that have no potentially damaging AM.
19 citations
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TL;DR: In this paper, a seismic network of 20 broadband seismometers has been operational on Piton de la Fournaise volcano since November 2009, but only 15 LP events were recorded.
18 citations
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TL;DR: In this paper, the sedimentation pattern along the margin of the Dhofar margin was investigated and two debris flow events occurred at the foot of the slope, one affecting a wide area of the margin, marking a major change in sedimentation and the second event is associated with a shift of sedimentary deposition from the slope toward the basin.
Abstract: An investigation of the sedimentation pattern along the Dhofar margin allows us to describe its late-stage evolution. After the accumulation of a thick post-rift sedimentary succession, two debris flow events occurred at the foot of the slope. The first event, affecting a wide area of the margin, marks a major change in sedimentation. The second event is associated with a shift of sedimentary deposition from the slope toward the basin. This latter debris flow was caused by an uplift phase, and highlights two distinct deformational styles in the eastern and western part of the Dhofar margin. Both events occurred very late in the history of the margin, at least 7.6 Ma after the end of the rifting phase (35-17.6 Ma).
18 citations
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TL;DR: In this article, the authors compared the diffraction data at the smaller scattering vectors, Q, with simulated X-ray and neutron diffraction patterns for compositionally similar crystals and suggested that the smaller Q features in the glasses have similar structural origins to those in the scattering data for the crystals with the same composition.
Abstract: Neutron scattering data have been obtained for a strontium- and a barium-containing silicate glass and a strontium aluminosilicate glass. These data are compared with previously published anomalous wide-angle X-ray scattering data for the Sr-containing glasses. Features in the diffraction data at the smaller scattering vectors, Q , are compared with simulated X-ray and neutron diffraction patterns for compositionally similar crystals. Peaks are found at Q s close to the `first sharp diffraction peaks' of the glasses and have a cation–cation dependence. We suggest that this correspondence shows that the smaller Q features in the glasses have similar structural origins to those in the scattering data for the crystals with the same composition and therefore that the medium-range structures and cation–cation arrangements in the glasses are similar too.
18 citations
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TL;DR: In this paper, the possible integration of all types of cations in Mg- and Ca-bearing silicate perovskite phases is discussed using a schematic pyrolitic composition for the lower mantle.
18 citations
Authors
Showing all 903 results
Name | H-index | Papers | Citations |
---|---|---|---|
Claude J. Allègre | 106 | 327 | 35092 |
Paul Tapponnier | 99 | 294 | 42855 |
Francesco Mauri | 85 | 352 | 69332 |
Barbara Romanowicz | 67 | 284 | 14950 |
Geoffrey C. P. King | 64 | 157 | 17177 |
Yi-Gang Xu | 64 | 271 | 14292 |
Jérôme Gaillardet | 63 | 199 | 14878 |
François Guyot | 61 | 292 | 12444 |
Georges Calas | 60 | 266 | 10901 |
Ari P. Seitsonen | 59 | 212 | 45684 |
Michele Lazzeri | 58 | 140 | 57079 |
Bernard Bourdon | 58 | 118 | 9962 |
Gianreto Manatschal | 56 | 200 | 10063 |
Nikolai M. Shapiro | 56 | 154 | 15508 |
Guillaume Morin | 55 | 156 | 7218 |