Literatura académica sobre el tema "Faisceau cohérent"
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Artículos de revistas sobre el tema "Faisceau cohérent"
Nicaise, Nicolas. "Antonine Maillet : conteuse de l’Acadie? ou la question du positionnement de l’écrivaine". Études, n.º 22-23 (25 de marzo de 2013): 183–200. http://dx.doi.org/10.7202/1014981ar.
Texto completoChanteloup, Jean-Christophe y Ihsan Fsaifes. "Le laser XCAN : façonner la lumière en mode digital". Photoniques, n.º 118 (2023): 35–39. http://dx.doi.org/10.1051/photon/202311835.
Texto completoLe Déroff, L., B. Carré, P. Salières, D. Joyeux y D. Phalippou. "Propriétés de cohérence spatiale d'un faisceau d'harmoniques". Le Journal de Physique IV 09, PR5 (mayo de 1999): Pr5–17—Pr5–18. http://dx.doi.org/10.1051/jp4:1999506.
Texto completoFerrer, J. y F. Puerta. "Déformations C*-équivariantes de germes de faisceaux cohérents". Studia Mathematica 91, n.º 3 (1988): 205–30. http://dx.doi.org/10.4064/sm-91-3-205-230.
Texto completoEyssidieux, Philippe. "Invariants de Von Neumann des faisceaux analytiques cohérents". Mathematische Annalen 317, n.º 3 (julio de 2000): 527–66. http://dx.doi.org/10.1007/pl00004413.
Texto completoPali, Nefton. "Faisceaux $$\bar{\partial}$$ -cohérents sur les variétés complexes". Mathematische Annalen 336, n.º 3 (10 de agosto de 2006): 571–615. http://dx.doi.org/10.1007/s00208-006-0010-1.
Texto completoDucros, Antoine. "Dévisser, découper, éclater et aplatir les espaces de Berkovich". Compositio Mathematica 157, n.º 2 (febrero de 2021): 236–302. http://dx.doi.org/10.1112/s0010437x20007459.
Texto completoPopovici, Dan. "Cohérence des faisceaux d'idéaux multiplicateurs avec estimations". Comptes Rendus Mathematique 338, n.º 2 (enero de 2004): 151–56. http://dx.doi.org/10.1016/j.crma.2003.11.012.
Texto completoRipoll, François. "Le bouclier d’Énée : unité thématique et cohérence structurelle". Revue des Études Anciennes 123, n.º 2 (2021): 615–37. http://dx.doi.org/10.3406/rea.2021.7001.
Texto completoBanerjee, Abhishek. "Schémas sur les catégories abéliennes monoïdales symétriques et faisceaux quasi-cohérents". Journal of Algebra 423 (febrero de 2015): 148–76. http://dx.doi.org/10.1016/j.jalgebra.2014.10.012.
Texto completoTesis sobre el tema "Faisceau cohérent"
Ayanides, Jean-Philippe. "Etude statistique de la propagation non-linéaire d'un faisceau laser partiellement cohérent". Palaiseau, Ecole polytechnique, 2001. http://www.theses.fr/2001EPXX0034.
Texto completoMasiello, Fabio. "Diffraction et imagerie aux rayons X en utilisant un faisceau cohérent : applications aux optiques rayons X et au cristaux comportant des hétérogénéités de phase". Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00609216.
Texto completoPavel, Mihai-Cosmin. "Moduli spaces of semistable sheaves". Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0125.
Texto completoIn this thesis we construct moduli spaces of semistable sheaves over a complex smooth projective variety X, endowed with a fixed polarization sheaf{O}_X(1). Our approach is based on ideas of Le Potier and Jun Li, who independently constructed moduli spaces of slope-semistable torsion-free sheaves over (projective) surfaces. Their spaces are closely related, via the Kobayashi-Hitchin correspondence, to the so-called Donaldson-Uhlenbeck compactification in gauge theory. Here, however, we are mainly interested in the algebraical aspects of their work. In a restrictive sense, this thesis generalizes their construction to higher dimensional pure sheaves, whose support scheme might be singular. First we introduce a notion of stability for pure coherent sheaves of dimension d on X, which lies between slope- and Gieseker-stability. This is defined with respect to the Hilbert polynomial of the sheaf, truncated down to a certain degree. We call it ell-(semi)stability, where ell marks the level of truncation. In particular, this recovers the classical notion of slope-stability for ell =1 and of Gieseker-stability for ell = d. Our construction uses as main ingredient a restriction theorem for (semi)stability, saying that the restriction of an ell-semistable (or ell-stable) sheaf to a general divisor D in |sheaf{O}_X(a)| of sufficiently large degree in X is again ell-semistable (respectively ell-stable). In this regard, in Chapter~ef{ch:RestrictionTheorems} we prove several restriction theorems for pure sheaves (see Theorems~ef{thm:GiesekerRestriction},ef{thm:restrictionStable} and ef{thm:ThmC}). The methods employed in the proofs permit us to give statements in arbitrary characteristic. Furthermore, our results generalize the restriction theorems of Mehta and Ramanathan for slope-(semi)stability, and they apply in particular to Gieseker-semistable sheaves. Before we give the construction, we take a short detour to generalize the classical Iitaka fibration to the equivariant setting. Given this, we construct projective moduli spaces of ell-semistable sheaves in higher dimensions as certain equivariant Iitaka fibrations (see Theorem~ef{thm:mainThm}). Our construction is new in the literature when 1
Gamelin, Alexis. "Collective effects in a transient microbunching regime and ion cloud mitigation in ThomX". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS276/document.
Texto completoThe thesis is focused on the study of collective effects in a 50 MeV electron storage ring, ThomX, in the absence of synchrotron radiation damping and of longitudinal matching. This thesis is divided in two distinct parts. The first part corresponds to the design of the impedance model (geometric and resistive wakefields, coherent synchrotron radiation) of the storage ring in order to simulate the beam dynamics. The geometric impedance model of the storage ring was obtained via simulation of the individual elements and was checked using wire measurements on prototypes. The coherent synchrotron radiation was simulated taking into account a rectangular vacuum chamber. Beam dynamics simulations, from the RF gun cathode to the storage ring, including collective effects are presented. The simulations are used to optimise the beam dynamics in the storage ring in the micro-bunching regime. The second part is the study of the ion cloud produced by the ionisation of the residual vacuum molecules and the optimisation of the ion clearing techniques. The longitudinal ion accumulation points and the trapping in magnetic fields are both studied analytically and by using a tracking code developed for this purpose. Clearing electrodes and clearing gaps are simulated and optimised using this code and the strategy chosen for the limitation of ion induced effects is described. Finally, the effect of multi-ionisation and ion dissociation is taken into account and the ion effect on the electron beam is estimated
Macor, Alessandro. "D'un faisceau test à l'auto-cohérence dans l'interaction onde-particule". Aix-Marseille 1, 2007. http://www.theses.fr/2007AIX11016.
Texto completoSamokhin, Alexander. "Les catégories dérivées des faisceaux cohérents sur certaines variétés de Fano". Paris 13, 2005. http://www.theses.fr/2005PA132025.
Texto completoMocella, Vito. "Cohérence d'un faisceau synchrotron et théorie dynamique de la diffraction : simulations et expériences". Grenoble 1, 1999. http://www.theses.fr/1999GRE10088.
Texto completoBellanger, Cindy. "Techniques collectives pour la recombinaison cohérente d'un grand nombre de fibres laser". Phd thesis, Université Paris Sud - Paris XI, 2010. http://tel.archives-ouvertes.fr/tel-00498684.
Texto completoPaboeuf, David. "Combinaison cohérente de diodes laser de luminance élevée en cavité externe". Paris 11, 2009. http://www.theses.fr/2009PA112161.
Texto completoThe constant and growing demand for compact and efficient laser sources leads to explore new architectures aiming at increasing the he output powers of laser diodes. The most promising solution consists in utilizing several moderate-power identical lasers in parallel. It is then necessary to induce a constant phase relationship between the lasers to maintain the spatial beam quality. We present a theoretical and experimental study of the passive phase locking of an array of high-power diode lasers. We take benefit of the angular and spectral filtering properties of volume Bragg gratings in an external cavity. Two solutions have been considered : the first one uses the self-imaging Talbot effect and the second one consists in a selective angular filtering of the array emission. A theoretical model aiming at determining the modal behaviour of those two cavities has been realized. Moreover, concerning the Talbot cavity, in collaboration with the university of Nottingham, a cavity model taking into account the internal properties of the diode lasers has also been used. Experimentally, several cavity setups adapted to different array geometries have been investigated. Each of them achieved a coherent emission. We show that the use of volume Bragg gratings inside the cavity improve both the coherence and the spectrum of the lasers. Finally, we present an original solution using phase filters to convert the multilobed beam from the laser cavity into a Gaussian beam profile
Guillot, Julien. "Laser à fibres auto-organisé à faisceaux multiples couplés". Limoges, 2011. https://aurore.unilim.fr/theses/nxfile/default/9efcf767-6daf-4baf-95f8-8f49d53d2ebb/blobholder:0/2011LIMO4003.pdf.
Texto completoThis document deals with passive coherent combining of fiber lasers. The laser architecture explored is a configuration with multiple emitters where the beam phase-locking is based on an intracavity spatial frequency filtering and self-organization properties of lasers. The multiple beams are combined only in the far field. The experimental results show this phasing technique is scalable to high power levels. Moreover, an experimental study demonstrates that this technique have a rapid dynamic phase-locking. However, a numerical and experimental study show this passive phasing technique can combined only a dozen of beams effectively. So, a new architecture with multiple feedbacks has been proposed. The numerical results are very promising and reveal a very significant contribution of this new architecture
Capítulos de libros sobre el tema "Faisceau cohérent"
Serre, Jean-Pierre. "Faisceaux algébriques cohérents". En Springer Collected Works in Mathematics, 310–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-39816-2_29.
Texto completoSerre, Jean-Pierre. "Prolongement de faisceaux analytiques cohérents". En Springer Collected Works in Mathematics, 277–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-37726-6_68.
Texto completoActas de conferencias sobre el tema "Faisceau cohérent"
Chaikovska, I., R. Chiche, E. Cormier, N. Delerue, D. Jehanno, F. Labaye, M. Lacroix, V. Soskov, A. Variola y F. Zomer. "Génération d'un faisceau polarisé gamma à très haut flux par diffusion Compton : l'expérience Mighty Laser". En UVX 2012 - 11e Colloque sur les Sources Cohérentes et Incohérentes UV, VUV et X ; Applications et Développements Récents, editado por E. Constant, P. Martin y H. Bachau. Les Ulis, France: EDP Sciences, 2013. http://dx.doi.org/10.1051/uvx/201301013.
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