Mr. Alain M. Labèque Profile

Alain M. Labèque

at Institut d'Astrophysique Spatiale

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Author

Publications (12)

Proceedings Article | 13 April 2018 Paper

Nulling interferometry for the Darwin mission: polychromatic laboratory test bench

F. Brachet, A. Labèque, A. Léger, M. Ollivier, c. Lizambert, V. Hervier, B. Chazelas, B. Pellet, T. Lépine, c. Valette

Proceedings Volume 10568, 1056822 (2018) https://doi.org/10.1117/12.2500097

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Proceedings Article | 21 November 2017 Open Access

Nulling interferometry for the darwin mission: laboratory demonstration experiment

Marc Ollivier, Alain Léger, Predrag Sekulic, Alain Labèque, Guy Michel

Proceedings Volume 10569, 1056911 (2017) https://doi.org/10.1117/12.2307875

KEYWORDS: Optical filters, Interferometers, Wavefronts, Nulling interferometry, Spatial filters, Infrared radiation, Polarization, Gas lasers, Thermography, Optical fibers

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Proceedings Article | 22 July 2010 Paper

The NULLTIMATE test bench: achromatic phase shifters for nulling interferometry

Peter Schuller, Olivier Demangeon, Alain Léger, Marc Barillot, Bruno Chazelas, Michel Decaudin, Marc Derrien, Philippe Duret, Pavel Gabor, Grégory Gadret, Jean Gay, Alain Labèque, Ralf Launhardt, Jacques Mangin, Yves Rabbia, Zoran Sodnik

Proceedings Volume 7734, 77342E (2010) https://doi.org/10.1117/12.857136

KEYWORDS: Phase shifts, Mirrors, Interferometers, Nulling interferometry, Germanium, Polarization, Refractive index, Thermography, K band, Optical benches

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Proceedings Article | 28 July 2008 Paper

Stabilising a nulling interferometer using optical path difference dithering: an update

Pavel Gabor, Bruno Chazelas, Peter Schuller, Frank Brachet, Marc Ollivier, Michel Decaudin, Alain Labèque, Philippe Duret, Sophie Jacquinod, Alain Léger

Proceedings Volume 7013, 70131R (2008) https://doi.org/10.1117/12.789222

KEYWORDS: Interferometers, Nulling interferometry, Data acquisition, Servomechanisms, Signal detection, Signal to noise ratio, Metrology, Phase shifts, Exoplanets, Interferometry

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Proceedings Article | 28 July 2008 Paper

Tests of achromatic phase shifters performed on the SYNAPSE test bench: a progress report

Pavel Gabor, Peter Schuller, Bruno Chazelas, Michel Decaudin, Alain Labèque, Philippe Duret, Yves Rabbia, Ralf Launhardt, Jean Gay, Zoran Sodnik, Marc Barillot, Frank Brachet, Thomas Laurent, Sophie Jacquinod, Denis Vandormael, Jérôme Loicq, Dimitri Mawet, Marc Ollivier, Alain Léger

Proceedings Volume 7013, 70134O (2008) https://doi.org/10.1117/12.789269

KEYWORDS: Phase shifts, Interferometers, Prisms, Single mode fibers, Sensors, Prototyping, Nulling interferometry, Optical filters, Lithium, K band

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Proceedings Article | 20 October 2004 Paper

The Nulltimate project: building and testing, at low temperature, achromatic phase shifters to prepare the Darwin mission

Alain Labeque, Bruno Chazelas, Frank Brachet, Christian Commeaux, Philippe Blache, Alain Leger, Marc Ollivier, Thierry Lepine, Claude Valette

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550910

KEYWORDS: Phase shifts, Planets, Interferometers, Cryogenics, Signal to noise ratio, Mirrors, Optical filters, Sensors, Beam splitters, Metrology

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Proceedings Article | 20 October 2004 Paper

Opto-thermo-mechanical numerical simulations of three different concepts of infrared achromatic phase shifters

Bruno Chazelas, Claude Valette, Thierry Lepine, Marc Barillot, Frank Brachet, Sebatien Dervaux, Francois Fressin, Jean Gay, Gregory Gadret, Alain Labeque, Alain Leger, Ralph Launhardt, Jacques Mangin, Dimitri Mawet, Marc Ollivier, Yves Rabbia, Elke Schmidt

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551587

KEYWORDS: Monte Carlo methods, Mirrors, Wavefronts, Tolerancing, Nulling interferometry, Polarization, Numerical simulations, Phase shifts, Optical components, Ray tracing

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Proceedings Article | 20 October 2004 Paper

Nulling interferometry for the Darwin Mission: polychromatic laboratory test bench

Frank Brachet, Alain Labeque, Alain Leger, Marc Ollivier, Claude Lizambert, Veronique Hervier, Bruno Chazelas, B. Pellet, Thierry Lepine, Claude Valette

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550399

KEYWORDS: Phase shifts, Interferometers, Nulling interferometry, Prisms, Infrared radiation, Sensors, Thermography, Metrology, Optical components, Control systems

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Proceedings Article | 26 February 2003 Paper

New polychromatic test bench for Darwin/TPF nulling interferometer laboratory demonstration

Alain Labeque, Alain Leger, Predrag Sekulic, Frank Brachet, Marc Ollivier, Thierry Lepine, Claude Valette, Claude Lizambert, Veronique Hervier

Proceedings Volume 4852, (2003) https://doi.org/10.1117/12.460698

KEYWORDS: Beam splitters, Planets, Interferometers, Nulling interferometry, Space telescopes, Telescopes, Infrared radiation, Phase shifts, Mirrors, Metrology

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Proceedings Article | 29 September 1999 Paper

Web-based learning by engineering for MEMS technologies

Rainer Brueck, Kai Hahn, Andreas Schmidt, Christine Fritzsch, Alain Labeque, Gordana Popovic, Nadeem Rizvi

Proceedings Volume 3894, (1999) https://doi.org/10.1117/12.364519

KEYWORDS: Internet, Microelectromechanical systems, Microtechnology, Multimedia, Video, Product engineering, Engineering education, Laser applications, Microelectronics, Information technology

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Proceedings Article | 15 October 1997 Paper

Institut d'Astrophysique Spatiale (IAS) 0.1- to 15-keV Synchrotron Radiation Facility beam lines

Pierre Dhez, Erick Jourdain, Olivier Hainaut, Jean-Francois Hochedez, Alain Labeque, Philippe Salvetat, Xueyan Song

Proceedings Volume 3114, (1997) https://doi.org/10.1117/12.278911

KEYWORDS: Monochromators, Cameras, Crystals, Calibration, Mirrors, Synchrotrons, Jupiter, Sensors, CCD cameras, Laser crystals

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Proceedings Article | 31 October 1996 Paper

EPIC system onboard the ESA XMM

Gabriele Villa, Anthony Abbey, Monique Arnaud, M. Balasini, Giovanni Bignami, Michel Boer, Heinrich Braeuninger, I Butler, G. Cafagna, C. Cara, C. Chabaud, Lucio Chiappetti, Richard Cole, M. Conte, J. Dowson, Pierre Dhez, R. Duc, Guido Di Cocco, Philippe Ferrando, C. Goodall, H. Hippman, Andrew Holland, Eckhard Kendziorra, Alain Labeque, Norbert Meidinger, C. Moriggio, Nicola La Palombara, C. Musso, E. Poindron, Giovanni Peres, E. Pferrerman, Claude Pigot, John Pye, Claus Reppin, D. Schmitt, Salvatore Sciortino, Salvatore Serio, J. Spragg, John Stephen, Lothar Strueder, Massimo Trifoglio, P. Tua, Martin Turner, S. Whitehead

Proceedings Volume 2808, (1996) https://doi.org/10.1117/12.256015

KEYWORDS: Cameras, Charge-coupled devices, Molybdenum, CCD cameras, Electronics, Control systems, Optical filters, Aluminum, X-rays, Mirrors

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The European photon imaging camera (EPIC) is one of the two main instruments onboard the ESA X-Ray Cornerstone Mission XMM. It is devoted to performing imaging and spectroscopy of the x-ray sky in the domain 0.1 10 keV with a peak sensitivity in 10⁵ seconds of 2 multiplied by 10^-15 erg/cm^-2. The x-ray instrumentation is complemented by a radiation monitor which will measure the particle background. The spectral resolution is approximately 140 eV at 6.4 keV and 60 eV at 1 keV. The instrumentation consists of three separate focal plane cameras at the focus of the three XMM telescopes, containing CCDs passively cooled to typically minus 100 degrees via radiators pointing toward the anti-Sun direction. The two cameras with the field of view partially occulted by the RGS grating boxes will have MOS technology CCDs while the third camera, with full field of view, will be based on p-n technology. The CCDs in the focal plane of the cameras will cover the entire 30 foot by 30 foot field of view of the telescope while the pixel size (40 by 40 (mu) for the MOS camera and 150 multiplied by 150 (mu) for the p-n) will be adequate to sample the approximately 20' PSF of the mirrors. In order to cope with a wide range of sky background and source luminosity in the visible/UV band, a filter wheel with six positions has been implemented in each camera. The six positions correspond to: open position, closed position, one thin filter (1600 angstrom of plastic support and 400 angstrom of Al), one medium filter (1600 angstrom of plastic support and 800 angstrom of Al) and one thick filter (approximately 3000 angstrom of plastic support, approximately 1000 angstrom of Al and 300 Angstrom of Sn). The final position will be a redundant filter of type still to be decided. A set of radioactive sources in each camera will allow the calibration of the CCDs in any of the operating modes and with any filter wheel position. Vacuum doors and valves operated will allow the operation of other camera heads on the ground, in a vacuum chamber and/or in a controlled atmosphere, and will protect the CCDs from contamination until the spacecraft is safely in orbit. The MOS camera will have 7 CCDs, each of 600 by 600 pixels arranged in a hexagonal pattern with one central and six peripheral. The p-n camera head will have 12 CCDs, each with 200 multiplied by 64 pixels, in a rectangular arrangement, 4 quadrants of 3 CCDs each. The radiation monitor is based on two separate detectors to monitor the low (electrons greater than 30 keV) and the high (electrons greater than 200 keV and protons greater than 10 MeV) energy particles impinging on the telescope along its orbit.

Showing 5 of 12 publications

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