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Your search keyword '"Ravet, Marie-Francoise"' showing total 22 results
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22 results on '"Ravet, Marie-Francoise"'

1. Study of normal incidence of three-component multilayer mirrors in the range 20-40 nm

Author

Gautier, Julien, Delmotte, Franck, Roulliay, Marc, Bridou, Francoise, Ravet, Marie-Francoise, and Jerome, Arnaud

Subjects
Optics -- Research, Astronomy, Physics
Abstract

We study theoretically and experimentally the increase of normal incidence reflectivity generated by addition of a third material in the period of a standard periodic multilayer, for wavelengths in the range 20 to 40 nm. The nature and thickness of the three materials has been optimized to provide the best enhancement of reflectivity. Theoretical reflectivity of an optimized [B.sub.4]C/Mo/Si multilayer reaches 42% at 32 nm. [B.sub.4]C/Mo/Si multilayers have been deposited with a magnetron sputtering system and a reflectivity of 34% at 32 nm has been measured on a synchrotron radiation source. OCIS codes: 340.7470, 310.1860.

Published
2005

2. X-ray-ultraviolet beam splitters for the Michelson interferometer

Author

Delmotte, Franck, Ravet, Marie-Francoise, Bridou, Francoise, Varniere, Francoise, Zeitoun, Philippe, Hubert, Sebastien, Vanbostal, Laurent, and Soullie, Gerard

Subjects
Interferometers -- Design and construction, Silicon nitride, Thin films, Multilayered, Ion bombardment, Astronomy, Physics
Abstract

With the aim of realizing a Michelson interferometer working at 13.9 nm, we have developed a symmetrical beam splitter with multilayers deposited on the front and back sides of a silicon nitride membrane. On the basis of the experimental optical properties of the membrane, simulations have been performed to define the multilayer structure that provides the highest reflectivity--transmission product. Optimized Mo-Si multilayers have been successfully deposited on both sides of the membrane by use of the ion-beam sputtering technique, with a thickness-period reproducibility of 0.1 nm. Measurements by means of synchrotron radiation at 13.9 nm and at an angle of 45o provide a reflectivity of 14.2% and a transmission of 15.2% for a 60% s-polarized light, close to the simulated values. Such a beam splitter has been used for x-ray laser Michelson interferometry at 13.9 nm. The first interferogram is discussed. OCIS codes: 230.1360, 230.4170, 310.1860, 310.6860, 340.0340, 340.7450.

Published
2002

3. X-ray multilayer monochromator with enhanced performance

Author

Andre, Jean-Michel, Benbalagh, Rabah, Barchewitz, Robert, Ravet, Marie-Francoise, Raynal, Alain, Delmotte, Frank, Bridou, Francoise, Julie, Gwenaelle, Bosseboeuf, Alain, Laval, Rene, Soullie, Gerard, Remond, Christian, and Fialin, Michel

Subjects
Optics -- Research, Thin films -- Usage, Lithography -- Research, Semiconductors -- Etching, Astronomy, Physics
Abstract

An x-ray multilayer monochromator with improved resolution and a low specular background is presented. The monochromator consists of a lamellar multilayer amplitude grating with appropriate parameters used at the zeroth diffraction order. The device is fabricated by means of combining deposition of thin films on a nanometer scale, LTV lithography, and reactive ion etching. The performance of this new monochromator at photon energies near 1500 eV is shown. OCIS codes: 340.0340, 300.6560.

Published
2002

6. Innovative designs for the imaging suite on Solar Orbiter

Author

Auchere, Frederic, primary, Song, Xueyen, additional, Rouesnel, Frederic, additional, Appourchaux, Thierry, additional, Fourmon, Jean-Jacques, additional, Le Clec'h, Jean-Christophe, additional, Berthe, Michel, additional, Defise, Jean-Marc, additional, Mazy, Emmanuel, additional, Rochus, Pierre L., additional, Mercier, Raymond, additional, and Ravet, Marie-Francoise, additional

Published
2005
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8. MAGRITTE optomechanical design and mirror manufacturing

Author

Mazy, Emmanuel, primary, Defise, Jean-Marc, additional, Halain, Jean-Philippe, additional, Rochus, Pierre, additional, Rossi, Laurence, additional, Mercier, Raymond, additional, Ravet, Marie-Francoise, additional, Delmotte, Franck, additional, and Idir, Mourad, additional

Published
2004
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9. EUVI: the STEREO-SECCHI extreme ultraviolet imager

Author

Wuelser, Jean-Pierre, primary, Lemen, James R., additional, Tarbell, Theodore D., additional, Wolfson, C. J., additional, Cannon, Joseph C., additional, Carpenter, Brock A., additional, Duncan, Dexter W., additional, Gradwohl, Glenn S., additional, Meyer, Syndie B., additional, Moore, Augustus S., additional, Navarro, Rosemarie L., additional, Pearson, J. D., additional, Rossi, George R., additional, Springer, Larry A., additional, Howard, Russell A., additional, Moses, John D., additional, Newmark, Jeffrey S., additional, Delaboudiniere, Jean-Pierre, additional, Artzner, Guy E., additional, Auchere, Frederic, additional, Bougnet, Marie, additional, Bouyries, Philippe, additional, Bridou, Francoise, additional, Clotaire, Jean-Yves, additional, Colas, Gerard, additional, Delmotte, Franck, additional, Jerome, Arnaud, additional, Lamare, Michel, additional, Mercier, Raymond, additional, Mullot, Michel, additional, Ravet, Marie-Francoise, additional, Song, Xueyan, additional, Bothmer, Volker, additional, and Deutsch, Werner, additional

Published
2004
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10. MAGRITTE: an instrument suite for the solar atmospheric imaging assembly (AIA) aboard the Solar Dynamics Observatory

Author

Rochus, Pierre L., primary, Defise, Jean-Marc, additional, Halain, Jean-Philippe, additional, Jamar, Claude A. J., additional, Mazy, Emmanuel, additional, Rossi, Laurence, additional, Thibert, Tanguy, additional, Clette, Frederic, additional, Cugnon, Pierre, additional, Berghmans, David, additional, Hochedez, Jean-Francois E., additional, Delaboudiniere, Jean-Pierre, additional, Auchere, Frederic, additional, Mercier, Raymond, additional, Ravet, Marie-Francoise, additional, Delmotte, Franck, additional, Idir, Mourad, additional, Schuehle, Udo H., additional, Bothmer, Volker, additional, Fineschi, Silvano, additional, Howard, Russell A., additional, Moses, John D., additional, and Newmark, Jeffrey S., additional

Published
2004
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11. Coherence measurements of a transient 14.7-nm x-ray laser

Author

Dunn, James, primary, Smith, Raymond F., additional, Hubert, Sebastian, additional, Fajardo, Marta, additional, Zeitoun, Philippe, additional, Hunter, James R., additional, Remond, Christian, additional, Vanbostal, Laurent, additional, Jacquemot, Sylvie, additional, Nilsen, Joseph, additional, Lewis, Ciaran L. S., additional, Marmoret, Remy, additional, Shlyaptsev, Vyacheslav N., additional, Ravet, Marie-Francoise, additional, and Delmotte, Franck, additional

Published
2003
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12. New techniques for the measurement of x-ray beam or x-ray optics quality

Author

Zeitoun, Philippe, primary, Balcou, Philippe, additional, Bucourt, Samuel, additional, Benredjem, Djamel, additional, Delmotte, Franck, additional, Dovillaire, Guillaume, additional, Douillet, Denis, additional, Dunn, James, additional, Faivre, G., additional, Fajardo, Marta, additional, Goldberg, Kenneth A., additional, Idir, Mourad, additional, Hubert, Sebastien, additional, Hunter, Jim, additional, Jacquemot, Sylvie, additional, Kazamias, Sophie, additional, le Pape, Sebastien, additional, Levecq, Xavier, additional, Lewis, Ciaran L. S., additional, Marmoret, Remy, additional, Mercere, Pascal, additional, Morlens, A. S., additional, Naulleau, Patrick P., additional, Remond, Christian, additional, Rocca, Jorge J., additional, Sebban, Stephane, additional, Smith, Raymond F., additional, Ravet, Marie-Francoise, additional, Troussel, Philippe, additional, Valentin, Constance, additional, and Vanbostal, Laurent, additional

Published
2003
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13. Longitudinal coherence measurements of a transient collisional x-ray laser

Author

Smith, Raymond F., primary, Dunn, James, additional, Hunter, James R., additional, Nilsen, Joseph, additional, Hubert, Sebastien, additional, Jacquemot, Sylvie, additional, Remond, Christian, additional, Marmoret, Remy, additional, Fajardo, Marta, additional, Zeitoun, Philippe, additional, Vanbostal, Laurent, additional, Lewis, Ciaran L.S., additional, Ravet, Marie Francoise, additional, and Delmotte, Franck, additional

Published
2003
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15. The solar high-resolution imager - coronagraph LYOT mission

Author

Vial, Jean-Claude, primary, Song, Xueyan, additional, Lemaire, Philippe, additional, Gabriel, Alan H., additional, Delaboudiniere, Jean-Pierre, additional, Bocchialini, Karine, additional, Koutchmy, Serge L., additional, Lamy, Philippe L., additional, Mercier, Raymond, additional, Ravet, Marie Francoise, additional, and Auchere, Frederic, additional

Published
2003
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18. MAGRITTE: an instrument suite for the solar atmospheric imaging assembly (AIA) aboard the Solar Dynamics Observatory.

Author

Rochus, Pierre L., Defise, Jean-Marc, Halain, Jean-Philippe, Jamar, Claude A. J., Mazy, Emmanuel, Rossi, Laurence, Thibert, Tanguy, Clette, Frederic, Cugnon, Pierre, Berghmans, David, Hochedez, Jean-Francois E., Delaboudiniere, Jean-Pierre, Auchere, Frederic, Mercier, Raymond, Ravet, Marie-Francoise, Delmotte, Franck, Idir, Mourad, Schuehle, Udo H., Bothmer, Volker, and Fineschi, Silvano

Published
2004
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21. Coherence measurements of a transient 14.7-nm x-ray laser.

Author

Dunn, James, Smith, Raymond F., Hubert, Sebastian, Fajardo, Marta, Zeitoun, Philippe, Hunter, James R., Remond, Christian, Vanbostal, Laurent, Jacquemot, Sylvie, Nilsen, Joseph, Lewis, Ciaran L. S., Marmoret, Remy, Shlyaptsev, Vyacheslav N., Ravet, Marie-Francoise, and Delmotte, Franck

Published
2003
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