Dr. Hervé Geoffray Profile

Dr. Hervé Geoffray

at Ctr National d'Études Spatiales

SPIE Involvement:

Author

Publications (25)

Proceedings Article | 27 August 2024 Poster + Paper

Poster + Paper

Toward a universal characterization methodology for conversion gain measurement of CMOS APS: application to Euclid and SVOM

J. Le Graët, A. Secroun, M. Tourneur-Silvain, E. Kajfasz, J.-L. Atteia, O. Boulade, A. Nouvel de la Flèche, H. Geoffray, W. Gillard, S. Escoffier, F. Fortin, N. Fourmanoit, S. Kermiche, H. Valentin, J. Zoubian

Proceedings Volume 13103, 131031W (2024) https://doi.org/10.1117/12.3020095

KEYWORDS: Sensors, Quantum efficiency, Signal detection, Bias correction, CMOS sensors, Quantum measurement, Infrared detectors, Histograms, Infrared sensors, Error analysis

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Proceedings Article | 21 August 2024 Presentation + Paper

Presentation + Paper

The detection chain for Athena X-IFU: a status on the design and demonstrations

H. Geoffray, B. Jackson, S. Bandler, S. Smith, W. Doriese, M. Durkin, J. van der Kuur, P. van der Hulst, M. Kiviranta, D. Prêle, M. Gonzalez, L. Ravera, Yann Parot, R. Den Hartog, E. Taralli, D. Vaccaro, H. van Weers, J. Adams, J. Chervenak, S. Hull, K. Sakai, N. Wakeham, C. Reintsema, J. Ullom, S. Beaumont, F. Brachet, C. Cenac-Morthe, E. Cucchetti, C. Daniel, P. Peille, J. Soucek, A. Argan, C. Macculi

Proceedings Volume 13093, 130930W (2024) https://doi.org/10.1117/12.3020011

KEYWORDS: Design, Multiplexers, Time division multiplexing, Crosstalk, X-rays

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Proceedings Article | 31 August 2022 Poster + Paper

Poster + Paper

A 50 mK test bench for demonstration of the readout chain of Athena/X-IFU

Florent Castellani, Sophie Beaumont, François Pajot, Gilles Roudil, Joseph Adams, Simon Bandler, James Chervenak, Christophe Daniel, Edward Denison, W. Bertrand Doriese, Michel Dupieux, Malcolm Durkin, Hervé Geoffray, Gene Hilton, David Murat, Yann Parot, Philippe Peille, Damien Prêle, Laurent Ravera, Carl Reintsema, Kazuhiro Sakai, Robert Stevens, Joel Ullom, Leila Vale, Nicholas Wakeham

Proceedings Volume 12181, 1218144 (2022) https://doi.org/10.1117/12.2630323

KEYWORDS: Electronics, Time division multiplexing, X-rays, Prototyping, Photons, Multiplexing, Linear filtering

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Proceedings Article | 31 August 2022 Presentation + Paper

Presentation + Paper

Design of the detection chain for Athena X-IFU

H. Geoffray, B. Jackson, S. Bandler, S. Smith, W. Doriese, M. Durkin, J. van der Kuur, B.-J. van Leeuwen, M. Kiviranta, D. Prêle, L. Ravera, Y. Parot, H. van Weers, J. W. den Herder, J. Adams, J. Chervenak, C. Reintsema, J. Ullom, F. Brachet, A. Ledot, P. Peille, D. Barret

Proceedings Volume 12181, 121810M (2022) https://doi.org/10.1117/12.2629960

KEYWORDS: Amplifiers, Electronics, Multiplexers, Staring arrays, Time division multiplexing, Sensors, X-rays, Multiplexing, Connectors, Switching

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Flux reconstruction for the NIR camera CAGIRE at the focus of the Colibrí Telescope

Alix Nouvel de la Flèche, Jean-Luc Atteia, Hervé Valentin, Marie Larrieu, Jérémie Boy, Olivier Gravrand, Olivier Boulade, Jean-Claude Clemens, Aurélia Secroun, Eric Kajfasz, Olivier Llido, Stéphane Basa, François Dolon, Johan Floriot, Simona Lombardo, Adrien Lamoure, Laurent Rubaldo, Bruno Fieque, Julien Roumegoux, Hervé Geoffray, Alan Watson, William Lee, Nathaniel Butler

Proceedings Volume 12191, 121910Q (2022) https://doi.org/10.1117/12.2627826

KEYWORDS: Sensors, Calibration, Astronomy, Telescopes, Near infrared, Cameras, Data acquisition, Stars, Signal detection, Readout integrated circuits

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CAGIRE is the near infrared camera of the Colibrí robotic telescope, designed for the follow-up of SVOM alerts, mainly Gamma Ray Bursts (GRBs), and the quick imaging of sky regions where transient sources are detected by the SVOM satellite. CAGIRE is based on the Astronomical Large Format Array (ALFA) 2k x 2k SWIR sensor from the French consortium CEA-LYNRED. In the context of CAGIRE the sensor is operated in “Up the Ramp” mode to observe the sky in a square field of view of 21.7 arcmin on a side, in the range of wavelengths from 1.1 to 1.8 μm. An observation with CAGIRE consists of a series of short (1-2 minutes) exposures during which the pixels are read out every 1.3 second, continuously accumulating charges proportionally to the received flux, building a ramp.

The main challenge is to quickly process and analyse these ramps, in order to identify and study the near infrared counterparts of the bursts, within 5 minutes of the reception of an alert. Our preprocessing, which is under development, aims at providing reliable flux maps for the astronomy pipeline. It is based on a sequence of operations. First, calibration maps are used to identify saturated pixels, and for each pixel, the usable (non saturated) range of the ramp. Then, the ramps are corrected for the electronic common mode noise, and differential ramps are constructed. Finally, the flux is calculated from the differential ramps, using a previously calibrated map of pixel non-linearities. We present here the sequence of operations performed by the preprocessing, which are based on previous calibrations of the sensor response. These operations lead to the production of a flux map corrected from cosmic-rays hits, a map depicting the quality of the fit, a map of saturated pixels and a map of pixels hit by cosmic-rays, before the acquisition of the next ramp. These maps will be used by the astronomy pipeline to quickly extract the scientific results of the observations, like the identification of uncatalogued or quickly variable sources that could be GRB afterglows.

Proceedings Article | 24 June 2021 Poster + Paper

Poster + Paper

A test platform for the detection and readout chain for the Athena X-IFU

Gabriele Betancourt-Martinez, François Pajot, Gilles Roudil, Joseph Adams, Simon Bandler, Sophie Beaumont, Bernard Bertrand, Florent Castellani, Edoardo Cucchetti, Michel Dupieux, Hervé Geoffray, Philippe Peille, Laurent Ravera, Doreen Wernicke, Aurélien Ledot

Proceedings Volume 11444, 1144444 (2021) https://doi.org/10.1117/12.2561281

KEYWORDS: Staring arrays, Sensors, Magnetism, Fused deposition modeling, Electronics, Magnetic sensors, X-rays, Time division multiplexing, Superconductors, Temperature metrology

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Proceedings Article | 13 December 2020 Presentation

Presentation

Conceptual design of the detection chain for the X-IFU on Athena

Hervé Geoffray, Brian Jackson, Simon Bandler, W. Bertrand Doriese, Mikko Kirivanta, Damien Prêle, Laurent Ravera, Andrea Argan, Marco Barbera, Jan van der Kuur, Bert Joost van Leeuwen, Henk van Weers, Ruud Hoogeveen, Jan-Willem den herder, Stephen Smith, Joe Adams, James Chervenak, Malcom Durkin, Carl Reintsema, Joel Ullom, Yann Parot, Didier Barret, Claudio Macculi, Luigi Piro, Frank Brachet, Aurélien Ledot

Proceedings Volume 11444, 114440X (2020) https://doi.org/10.1117/12.2563628

KEYWORDS: Sensors, Detector arrays, Electronics, Environmental sensing, Aerospace engineering, Multiplexing, Fused deposition modeling

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Proceedings Article | 31 July 2018 Presentation + Paper

Presentation + Paper

The ATHENA X-ray Integral Field Unit (X-IFU)

Didier Barret, Thien Lam Trong, Jan-Willem den Herder, Luigi Piro, Massimo Cappi, Juhani Houvelin, Richard Kelley, J. Miguel Mas-Hesse, Kazuhisa Mitsuda, Stéphane Paltani, Gregor Rauw, Agata Rozanska, Joern Wilms, Simon Bandler, Marco Barbera, Xavier Barcons, Enrico Bozzo, Maria Teresa Ceballos, Ivan Charles, Elisa Costantini, Anne Decourchelle, Roland den Hartog, Lionel Duband, Jean-Marc Duval, Fabrizio Fiore, Flavio Gatti, Andrea Goldwurm, Brian Jackson, Peter Jonker, Caroline Kilbourne, Claudio Macculi, Mariano Mendez, Silvano Molendi, Piotr Orleanski, François Pajot, Etienne Pointecouteau, Frederick Porter, Gabriel Pratt, Damien Prêle, Laurent Ravera, Kosuke Sato, Joop Schaye, Keisuke Shinozaki, Tanguy Thibert, Luca Valenziano, Véronique Valette, Jacco Vink, Natalie Webb, Michael Wise, Noriko Yamasaki, Françoise Douchin, Jean-Michel Mesnager, Bernard Pontet, Alice Pradines, Graziella Branduardi-Raymont, Esra Bulbul, Mauro Dadina, Stefano Ettori, Alexis Finoguenov, Yasushi Fukazawa, Agnieszka Janiuk, Jelle Kaastra, Pasquale Mazzotta, Jon Miller, Giovanni Miniutti, Yael Naze, Fabrizio Nicastro, Salavtore Scioritino, Aurora Simonescu, Jose Miguel Torrejon, Benoit Frezouls, Hervé Geoffray, Philippe Peille, Corinne Aicardi, Jérôme André, Christophe Daniel, Antoine Clénet, Christophe Etcheverry, Emilie Gloaguen, Gilles Hervet, Antoine Jolly, Aurélien Ledot, Irwin Paillet, Roseline Schmisser, Bruno Vella, Jean-Charles Damery, Kevin Boyce, Mike Dipirro, Simone Lotti, Denis Schwander, Stephen Smith, Bert-Joost Van Leeuwen, Henk van Weers, Nicolas Clerc, Beatriz Cobo, Thomas Dauser, Christian Kirsch, Edoardo Cucchetti, Megan Eckart, Philippe Ferrando, Lorenzo Natalucci

Proceedings Volume 10699, 106991G (2018) https://doi.org/10.1117/12.2312409

KEYWORDS: Spectral resolution, X-rays, Sensors, Cryogenics, Optical filters, Wind energy, Electronics, X-ray astronomy, Mirrors, X-ray sources

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Proceedings Article | 10 July 2018 Presentation

Presentation

The focal plane assembly for the ATHENA x-ray integral field unit instrument (Conference Presentation)

Brian Jackson, Roland den Hartog, Jan van der Kuur, Henk van Weers, Hiroki Akamatsu, Andrea Argan, Simon Bandler, Marco Barbera, Didier Barret, Marcel Bruijn, James Chervenak, Johannes Dercksen, Flavio Gatti, Herve Geoffray, Luciano Gottardi, Jan-Willem den Herder, Ruud Hoogeveen, Caroline Kilbourne, Mikko Kiviranta, Bert-Joost van Leeuwen, Dennis van Loon, Claudio Macculi, Jean-Michel Mesnager, Phillipe Peille, Luigi Piro, Stephen Smith, Francoise Douchin

Proceedings Volume 10699, 106991O (2018) https://doi.org/10.1117/12.2313980

KEYWORDS: Sensors, X-rays, Staring arrays, X-ray imaging, Environmental sensing, Observatories, Spectral resolution, Superconductors, Electronics, Particles

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Proceedings Article | 6 July 2018 Paper

Paper

The performance of the ATHENA X-ray Integral Field Unit

Philippe Peille, Roland den Hartog, Claudio Macculi, Marco Barbera, Simone Lotti, Edoardo Cucchetti, Christian Kirsch, Thomas Dauser, Joern Wilms, Simon Bandler, Stephen Smith, Brian Jackson, Hervé Geoffray, Jean-Michel Mesnager, François Pajot, Didier Barret, Thien Lam-Trong, Jan-Willem den Herder, Luigi Piro

Proceedings Volume 10699, 106994K (2018) https://doi.org/10.1117/12.2313720

KEYWORDS: X-rays, Sensors, Quantum efficiency, Mirrors, Optical filters, Image resolution, Contamination, Electronics, Device simulation, Performance modeling

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Proceedings Article | 21 November 2017 Open Access

Open Access

Paper

Low cost infrared space instrumentation using uncooled microbolometer arrays

Hervé Geoffray, Alain Bardoux, Michel Laporte

Proceedings Volume 10569, 105691E (2017) https://doi.org/10.1117/12.2307932

KEYWORDS: Infrared radiation, Aerospace engineering, Microbolometers, Infrared detectors, Sensors, Infrared sensors, Prototyping, Remote sensing

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Proceedings Article | 21 November 2017 Open Access

Open Access

Paper

Backthinned TDI CCD image sensor design and performance for the Pleiades high resolution Earth observation satellites

A. Materne, A. Bardoux, H. Geoffray, T. Tournier, P. Kubik, D. Morris, I. Wallace, C. Renard

Proceedings Volume 10567, 105671N (2017) https://doi.org/10.1117/12.2308100

KEYWORDS: Satellites, Sensors, Modulation transfer functions, Satellite imaging, CCD image sensors, Image resolution, Earth observing sensors, Quantum efficiency, Video, Silicon

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Proceedings Article | 25 September 2017 Open Access

Open Access

Paper

CNES infrared detector development for space missions: status and roadmap

Hervé Geoffray, L. Tauziede, O. Gravrand, B. Fièque, A. Bardoux

Proceedings Volume 10562, 1056242 (2017) https://doi.org/10.1117/12.2296234

KEYWORDS: Sensors, Photodiodes, Infrared detectors, Readout integrated circuits, Avalanche photodetectors, Interference (communication), Space operations, Mercury cadmium telluride, Astronomical imaging, Infrared radiation

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Proceedings Article | 17 August 2016 Paper

Paper

The Athena X-ray Integral Field Unit (X-IFU)

Didier Barret, Thien Lam Trong, Jan-Willem den Herder, Luigi Piro, Xavier Barcons, Juhani Huovelin, Richard Kelley, J. Miguel Mas-Hesse, Kazuhisa Mitsuda, Stéphane Paltani, Gregor Rauw, Agata Rożanska, Joern Wilms, Marco Barbera, Enrico Bozzo, Maria Teresa Ceballos, Ivan Charles, Anne Decourchelle, Roland den Hartog, Jean-Marc Duval, Fabrizio Fiore, Flavio Gatti, Andrea Goldwurm, Brian Jackson, Peter Jonker, Caroline Kilbourne, Claudio Macculi, Mariano Mendez, Silvano Molendi, Piotr Orleanski, François Pajot, Etienne Pointecouteau, Frederick Porter, Gabriel Pratt, Damien Prêle, Laurent Ravera, Etienne Renotte, Joop Schaye, Keisuke Shinozaki, Luca Valenziano, Jacco Vink, Natalie Webb, Noriko Yamasaki, Françoise Delcelier-Douchin, Michel Le Du, Jean-Michel Mesnager, Alice Pradines, Graziella Branduardi-Raymont, Mauro Dadina, Alexis Finoguenov, Yasushi Fukazawa, Agnieszka Janiuk, Jon Miller, Yaël Nazé, Fabrizio Nicastro, Salvatore Sciortino, Jose Miguel Torrejon, Hervé Geoffray, Isabelle Hernandez, Laure Luno, Philippe Peille, Jérôme André, Christophe Daniel, Christophe Etcheverry, Emilie Gloaguen, Jérémie Hassin, Gilles Hervet, Irwin Maussang, Jérôme Moueza, Alexis Paillet, Bruno Vella, Gonzalo Campos Garrido, Jean-Charles Damery, Chantal Panem, Johan Panh, Simon Bandler, Jean-Marc Biffi, Kevin Boyce, Antoine Clénet, Michael DiPirro, Pierre Jamotton, Simone Lotti, Denis Schwander, Stephen Smith, Bert-Joost van Leeuwen, Henk van Weers, Thorsten Brand, Beatriz Cobo, Thomas Dauser, Jelle de Plaa, Edoardo Cucchetti

Proceedings Volume 9905, 99052F (2016) https://doi.org/10.1117/12.2232432

KEYWORDS: X-rays, Sensors, Spectral resolution, Stars, Electronics, Galactic astronomy, Iron, Calibration, Signal to noise ratio, Staring arrays

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Proceedings Article | 23 July 2014 Paper

Paper

CNES detector development for scientific space missions: status and roadmap for infrared detectors

H. Geoffray, O. Boulade, B. Fièque, O. Gravrand, J. Rothmann, J. Zanatta, L. Tauziède, A. Bardoux

Proceedings Volume 9154, 915402 (2014) https://doi.org/10.1117/12.2058070

KEYWORDS: Sensors, Diodes, Photodiodes, Infrared detectors, Mercury cadmium telluride, Detector development, Short wave infrared radiation, Diffusion, Infrared radiation, Readout integrated circuits

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Proceedings Article | 23 July 2014 Paper

Paper

CNES detector developments from far-infrared to mm: status and roadmap

H. Geoffray, A. Monfardini, S. Marnieros, M. Piat, L. Rodriguez, A. Bardoux

Proceedings Volume 9153, 91531U (2014) https://doi.org/10.1117/12.2058069

KEYWORDS: Sensors, Bolometers, Multiplexing, Silicon, Electronics, Picture Archiving and Communication System, Detector development, Superconductors, Detector arrays, Capacitors

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Proceedings Article | 3 October 2011 Paper

Paper

Infrared ROIC for very low flux and very low noise applications

Bruno Fièque, Lilian Martineau, Eric Sanson, Philippe Chorier, Olivier Boulade, Vincent Moreau, Hervé Geoffray

Proceedings Volume 8176, 81761I (2011) https://doi.org/10.1117/12.898987

KEYWORDS: Capacitance, Readout integrated circuits, Sensors, Diodes, Polarization, Infrared sensors, Infrared detectors, Infrared radiation, CMOS technology, Photovoltaics

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Proceedings Article | 14 October 2010 Paper

Paper

Evaluation of a COTS Microbolometers FPA to space environments

H. Geoffray, G. Quadri, L. Tauziede, A. Materne, A. Bardoux

Proceedings Volume 7826, 78261U (2010) https://doi.org/10.1117/12.869726

KEYWORDS: Microbolometers, Staring arrays, Sensors, Infrared radiation, Thermography, Commercial off the shelf technology, Satellites, Environmental sensing, Space operations, Ions

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Proceedings Article | 18 July 2008 Paper

Paper

Bolometer arrays development in the DCMB French collaboration

Michel Piat, Y. Atik, B. Bélier, A. Benoit, L. Bergé, A. Bounab, E. Bréelle, P. Camus, S. Collin, F. X. Désert, L. Dumoulin, C. Evesque, H. Geoffray, M. Giard, C. Hoffmann, Y. Jin, G. Klisnick, S. Marnieros, A. Monfardini, F. Pajot, D. Prêle, M. Redon, D. Santos, D. Stanescu, G. Sou, F. Voisin

Proceedings Volume 7020, 70200G (2008) https://doi.org/10.1117/12.789703

KEYWORDS: Bolometers, Superconductors, Multiplexing, Niobium, Cryogenics, Sensors, Amplifiers, Microfabrication, Antennas, Standards development

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Proceedings Article | 26 October 2007 Paper

Paper

Radiation tolerance analysis of IASI infrared detectors in the 3.4-15.5um spectral range

Frédéric Bernard, Hervé Geoffray, Guy Rolland, O. Gilard, D. Blumstein, D. Coppens, F. Cayla

Proceedings Volume 6744, 674414 (2007) https://doi.org/10.1117/12.746905

KEYWORDS: Sensors, Annealing, Infrared detectors, Mercury cadmium telluride, Radiation effects, Photovoltaic detectors, Fermium, Tolerancing, Infrared radiation, Black bodies

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Proceedings Article | 21 October 2005 Paper

Paper

Long quadrilinear CCD sensors equipped with long linear filters: characteristics and performances for the multispectral channel of Earth observing systems

Herve Geoffray, Jacques Loesel, Isabelle Loiret, Jean-Jacques Quicot

Proceedings Volume 5978, 597814 (2005) https://doi.org/10.1117/12.628226

KEYWORDS: CCD image sensors, Charge-coupled devices, Optical filters, Sensors, Linear filtering, Prototyping, Interfaces, Stray light, Calibration, Signal to noise ratio

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Proceedings Article | 12 December 2001 Paper

Paper

Measured performance of a low-cost thermal infrared pushbroom camera based on uncooled microbolometer FPA for space applications

Herve Geoffray, Francois Guerin

Proceedings Volume 4540, (2001) https://doi.org/10.1117/12.450672

KEYWORDS: Cameras, Sensors, Infrared cameras, Thermography, Infrared radiation, Microbolometers, Staring arrays, Black bodies, Modulation transfer functions, Satellites

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Proceedings Article | 15 December 2000 Paper

Paper

Uncooled infrared microbolometer arrays for Earth remote sensing

Herve Geoffray, Alain Bardoux, Michel Laporte, Jean-Luc Tissot

Proceedings Volume 4130, (2000) https://doi.org/10.1117/12.409894

KEYWORDS: Microbolometers, Staring arrays, Remote sensing, Sensors, Infrared radiation, Amorphous silicon, Infrared sensors, Signal to noise ratio, Interference (communication), Spatial resolution

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Proceedings Article | 29 September 1995 Paper

Paper

MWIR COMIC imaging camera for the ADONIS adaptive optics system

Philippe Feautrier, Jean-Luc Beuzit, Francois Lacombe, Panayoti Petmezakis, Herve Geoffray, Jean-Louis Monin, Bernard Talureau, Pierre Gigan, Norbert Hubin, Luc Audaire

Proceedings Volume 2553, (1995) https://doi.org/10.1117/12.221358

KEYWORDS: Sensors, Cameras, Adaptive optics, Charge-coupled devices, Telescopes, Quantum efficiency, Electronics, Clocks, Imaging systems, Control systems

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Proceedings Article | 14 September 1994 Paper

Paper

1- to 5-um imaging detector for the ADONIS adaptive optics system

Philippe Feautrier, Herve Geoffray, Panayoti Petmezakis, Jean-Louis Monin, Etienne le Coarer, Luc Audaire

Proceedings Volume 2268, (1994) https://doi.org/10.1117/12.185848

KEYWORDS: Sensors, Adaptive optics, Quantum efficiency, Electronics, Control systems, Charge-coupled devices, Infrared imaging, Telescopes, Astronomy, Mercury cadmium telluride

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Showing 5 of 25 publications

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