Výsledky vyhledávání - "Analyse de surface"

Akademický článek

Autor: Fusco, Thierry

Publikováno v: Comptes Rendus. Mécanique, Vol 351, Iss S4, Pp 81-89 (2023)

Adaptive optics (AO), now installed on all the astronomical ground-based telescopes, make it possible to overcome the angular resolution limitations imposed by atmospheric turbulence. This article presents the state-of-the-art in the field of astrono

Externí odkaz: https://doaj.org/article/da55ee241c8b4b97b8f7b3bca25bde09

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Akademický článek

Optique adaptative : correction des effets de la turbulence atmosphérique sur les images astronomiques

Autor: Rousset, Gérard, Fusco, Thierry

Publikováno v: Comptes Rendus. Physique, Vol 23, Iss S1, Pp 293-344 (2023)

Today, adaptive optics (AO) is installed on all very large astronomical telescopes. It allows to overcome the limitation in angular resolution imposed on large ground-based telescopes by the atmospheric turbulence perturbations. This review paper pre

Externí odkaz: https://doaj.org/article/15947979f91c44fc9b17b9c5f3371f4e

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Eléments clés de l'analyse de front d'onde pour les systèmes d'optique adaptative tomographique assisté par Laser

Autor: Fusco, Thierry, Agapito, Guido, Neichel, Benoit, Oberti, Sylvain, Correia, Carlos, Haguenauer, Pierre, Plantet, Cédric, Pedreros, Felipe, Ke, Zibo, Costille, Anne, Jouve, Pierre, Busoni, Lorenzo, Esposito, Simone

Publikováno v: Journal of Astronomical Telescopes, Instruments, and Systems
Journal of Astronomical Telescopes, Instruments, and Systems, 2022, 8 (2), pp.021514

International audience; Laser guide star (LGS) wave-front sensing (LGSWFS) is a key element of tomographic adaptive optics system. However, when considering Extremely Large Telescope (ELT) scales, the LGS spot elongation becomes so large that it chal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3430::f6211951e5a6e916995380ec64ce4252
https://hal.science/hal-03514231v2/document

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Comparaison des techniques d’analyse de surface d’onde en plan focal dédiées aux missions spatiales d’imagerie directe et de spectroscopie des planètes extrasolaires

Autor: Axel Potier

Publikováno v: Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]. Université Paris sciences et lettres, 2020. Français. ⟨NNT : 2020UPSLO012⟩
HAL
Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]. Paris Sciences et Lettres; Observatoire de Paris – LESIA, 2020. Français

Understanding the formation, the evolution and the diversity of extrasolar planets is an important purpose in modern astrophysics. More than 4,000 objects have been discovered since the first discovery of an exoplanet orbiting a solar-type star in 19

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::2f3f05987406bd2bc0848cf92b5759aa
https://tel.archives-ouvertes.fr/tel-03065844v2/file/2020UPSLO012_archivage.pdf

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Optique adaptative - Principe et applications

Autor: Michau, Vincent, Petit, Cyril

Publikováno v: Les Techniques de l'Ingenieur
Les Techniques de l'Ingenieur, Editions T.I., 2021, Électronique-Photonique, Optique Photonique, Optique instrumentale, pp.E6290. ⟨10.51257/a-v1-e6290⟩

International audience; Adaptive optics is a technique that is becoming increasingly popular in a variety of fields. Initially developed to correct the effects of atmospheric turbulence, it is today applied to biomedical imaging as well as to large l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::d8dc2aa494abb43c56ce1c489f3d2507
https://hal.archives-ouvertes.fr/hal-03448597

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Procédés de dépôt par croissance sélective de silicium microcrystallin par PECVD : origine physique, défis et solutions

Autor: Akiki, Ghewa

This PhD thesis is devoted to the demonstration of a new area selective deposition process based on the plasma enhanced chemical vapor deposition (PECVD) technique and to understanding the physical origin behind it.The first section of the thesis exp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______166::0a111accc4b70cbad63a3989013f44c8
https://theses.hal.science/tel-03662473

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Études de surfaces texturées pour chemise moteur : Physico-chimie des tribofilms et lois de frottement associées

Autor: Hriouech, Amal

Cylinder liner-piston-rings contact is the major responsible of mechanical energy loss by friction in internal combustion engines. Tribological performance of this system depends on operating conditions, surface characteristics and properties of lubr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______166::e9fd5d924e0d70c92482b2eca076c1e1
https://theses.hal.science/tel-03646248

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Analyse de front d’onde et commande en optique adaptative pour la pupille fragmentée de l’ELT

Autor: Bertrou-Cantou, Arielle

The astronomical community is paving the way for extremely large telescopes, with notably the ELT, a European telescope equipped with a 40-meter diameter primary mirror. This telescope will enable the study of fainter astrophysical objects with a bet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______166::676fd3be1cef2490ae3ff3b5579d9be8
https://theses.hal.science/tel-03944092

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Dynamic pressure in particle accelerators : experimental measurements and simulation for the LHC

Autor: Bilgen, Suheyla

Publikováno v: Materials Science [cond-mat.mtrl-sci]. Université Paris-Saclay, 2020. English. ⟨NNT : 2020UPASP020⟩

Ultra-High Vacuum is an essential requirement to achieve design performances and high luminosities in high-energy particle colliders. Consequently, the understanding of the dynamic pressure evolution during accelerator operation is fundamental to pro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______212::25dcfdd65c5f5f3577125d15b2134b90
https://tel.archives-ouvertes.fr/tel-03362698/file/93615_BILGEN_2020_archivage.pdf

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Contribution of the satellite observations synergy in the definition of surface temperature in numerical weather prediction

Autor: Sassi, Mohamed Zied

Publikováno v: Météorologie. Université Paul Sabatier-Toulouse III, 2020. Français. ⟨NNT : 2020TOU30240⟩

Modeling surface-atmosphere radiative exchanges is crucial in numerical weather prediction. The surface temperature is a key parameter in this modelization. Above sea, the surface temperature varies on large space and time scales, unlike the continen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::de79e877d112661ff813de91138fbcc9
https://tel.archives-ouvertes.fr/tel-03228475/document

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