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A few years ago, Costabel and Dauge proposed a variational setting, which allows one to solve numerically the time-harmonic
Maxwell equations in 3D polyhedral geometries, with the help of a continuous approximation of the electromagnetic field. In
order to remove spurious eigenmodes, their method required a parameterization of the variational formulation. In order to
avoid this difficulty, we use a mixed variational setting instead of the parameterization, which allows us to handle the divergence-free
constraint on the field in a straightforward manner. The numerical analysis of the method is carried out, and numerical examples
are provided to show the efficiency of our approach. 相似文献
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Sebban S Haroutunian R Balcou P Grillon G Rousse A Kazamias S Marin T Rousseau JP Notebaert L Pittman M Chambaret JP Antonetti A Hulin D Ros D Klisnick A Carillon A Jaeglé P Jamelot G Wyart JF 《Physical review letters》2001,86(14):3004-3007
We report the first saturated amplification of an optical-field-ionization soft x-ray laser. The amplifying medium is generated by focusing a circularly polarized 330-mJ, 35-fs, 10-Hz Ti:sapphire laser system in a few-mm cell filled with xenon. A gain of 67 cm(-1) on the 4d(9)5p-4d(9)5d transition at 41.8 nm in Pd-like xenon and a gain-length product of 15 have been inferred at saturation. This source delivers about 5 x 10(9) photons per pulse. The influence of the pumping energy and the laser polarization on the lasing output are also presented. 相似文献
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