Prof. Thierry Appourchaux Profile

Prof. Thierry Appourchaux

Staff Scientist at Institut d'Astrophysique Spatiale

SPIE Involvement:

Author

Publications (25)

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

The on-ground data reduction and calibration pipeline for SO/PHI-HRT

J. Sinjan, D. Calchetti, J. Hirzberger, D. Orozco Suárez, K. Albert, N. Albelo Jorge, T. Appourchaux, A. Alvarez-Herrero, J. Blanco Rodríguez, A. Gandorfer, D. Germerott, L. Guerrero, P. Gutierrez Marquez, F. Kahil, M. Kolleck, S. K. Solanki, J. C. del Toro Iniesta, R. Volkmer, J. Woch, B. Fiethe, J. M. Gómez Cama, I. Pérez-Grande, E. Sanchis Kilders, M. Balaguer Jiménez, L. R. Bellot Rubio, M. Carmona, W. Deutsch, G. Fernandez-Rico, A. Fernández-Medina, P. García Parejo, J. L. Gasent Blesa, L. Gizon, B. Grauf, K. Heerlein, A. Korpi-Lagg, T. Lange, A. López Jiménez, T. Maue, R. Meller, H. Michalik, A. Moreno Vacas, R. Müller, E. Nakai, W. Schmidt, J. Schou, U. Schühle, J. Staub, H. Strecker, I. Torralbo, G. Valori

Proceedings Volume 12189, 121891J (2022) https://doi.org/10.1117/12.2629323

KEYWORDS: Space operations, Modulation, Polarimetry, Magnetism, Sun, Polarization, Demodulation, Calibration, Telescopes, Sensors, Data processing, Image processing

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Proceedings Article | 27 August 2022 Presentation + Paper

Presentation + Paper

PLATO EM first cryogenic vacuum test campaign PSF results

Francesco Borsa, Andrea Cottinelli, Nicolas Gorius, Claudio Arena, Bart Vandenbussche, Sara Regibo, Rik Huygen, Pierre Royer, Martin Pertenais, Cesar Martin, Thierry Appourchaux, Jose Lorenzo Alvarez, Tim van Kempen, Wouter Laauwen, Isabella Pagano, Roberto Ragazzoni

Proceedings Volume 12180, 121801D (2022) https://doi.org/10.1117/12.2630118

KEYWORDS: Point spread functions, Cameras, Space operations, Error analysis, Cryogenics, Stars, Data analysis, Charge-coupled devices, Telescopes

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Proceedings Article | 27 August 2022 Poster + Paper

Poster + Paper

Image quality of data products of the high resolution telescope of the polarimetric and helioseismic imager

F. Kahil, A. Gandorfer, J. Hirzberger, D. Orozco Suárez, K. Albert, N. Albelo Jorge, T. Appourchaux, A. Álvarez-Herrero, J. Blanco Rodríguez, D. Germerott, L. Guerrero, P. Gutierrez Marquez, J. Sinjan, D. Calchetti, M. Kolleck, S. Solanki, J. del Toro Iniesta, R. Volkmer, J. Woch, B. Fiethe, J. Gómez Cama, I. Pérez-Grande, E. Sanchis Kilders, M. Balaguer Jiménez, L. Bellot Rubio, M. Carmona, W. Deutsch, G. Fernandez-Rico, A. Fernández-Medina, P. García Parejo, J. Gasent Blesa, L. Gizon, B. Grauf, K. Heerlein, A. Korpi-Lagg, T. Lange, A. López Jiménez, T. Maue, R. Meller, H. Michalik, A. Moreno Vacas, R. Müller, E. Nakai, W. Schmidt, J. Schou, U. Schühle, J. Staub, H. Strecker, I. Torralbo, G. Valori

Proceedings Volume 12180, 121803F (2022) https://doi.org/10.1117/12.2628942

KEYWORDS: Wavefronts, Telescopes, Point spread functions, Image quality, Monochromatic aberrations, Image restoration, Calibration, Sun, Remote sensing, Reconstruction algorithms

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Characteristics and performances of an interferometric Doppler imager installed at the 188 cm telescope of Okayama Observatory

François-Xavier Schmider, Julien Dejonghe, Tristan Guillot, Masahiro Ikoma, Patrick Boumier, Bun'ei Sato, Jason Jackiewicz, Hideyuki Izumiura, Hidekazu Hanayama, Lyu Abe, Ivan Gonçalves, Carole Gouvret, Yan Fantéï-Caujolle, Frédéric Morand, Olivier Preis, Jean-Pierre Rivet, Thierry Appourchaux, Jean-Christophe Leclec'h, Hervé Ballans, François Langlet, Frédéric Baudin, Yuhiko Aoyama, Kiyoe Kawaushi, Takashi Horiuchi, Patrick Gaulme, David Voelz, Thomas Underwood

Proceedings Volume 11447, 114473D (2020) https://doi.org/10.1117/12.2559448

KEYWORDS: Telescopes, Doppler effect, Jupiter, Imaging systems, Observatories, Planets, Interferometry, Atmospheric sensing, Acoustics, Wind measurement

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Proceedings Article | 6 July 2018 Paper

Paper

The High Resolution Telescope (HRT) of the Polarimetric and Helioseismic Imager (PHI) onboard Solar Orbiter

A. Gandorfer, B. Grauf, J. Staub, J. Bischoff, J. Woch, J. Hirzberger, S. Solanki, A. Álvarez-Herrero, P. García Parejo, W. Schmidt, R. Volkmer, T. Appourchaux, J. C. del Toro Iniesta

Proceedings Volume 10698, 106984N (2018) https://doi.org/10.1117/12.2311816

KEYWORDS: Mirrors, Telescopes, Space telescopes, Fabry–Perot interferometers, Optical filters, Polarimetry, Optical alignment, Imaging systems

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Solar Orbiter is a joint mission of ESA and NASA scheduled for launch in 2020. Solar Orbiter is a complete and unique heliophysics mission, combining remote sensing and in-situ analysis; its special elliptical orbit allows viewing the Sun from a distance of only 0.28 AU, and - leaving the ecliptic plane - to observe the solar poles from a hitherto unexplored vantage point. One of the key instruments for Solar Orbiter’s science is the "Polarimetric and Helioseismic Imager" (PHI), which will provide maps of the solar surface magnetic fields and the gas flows on the visible solar surface. Two telescopes, a full disc imager, and a high resolution channel feed a common Fabry-Perot based tunable filter and thus allow sampling a single Fraunhofer line at 617.3 nm with high spectral resolution; a polarization modulation system makes the system sensitive to the full state of polarization. From the analysis of the Doppler shift and the magnetically induced Zeeman polarization in this line, the magnetic field and the line-of-sight gas motions can be detected for each point in the image. In this paper we describe the opto-mechanical system design of the high resolution telescope. It is based on a decentred Ritchey-Chrétien two-mirror telescope. The telescope includes a Barlow type magnifier lens group, which is used as in-orbit focus compensator, and a beam splitter, which sends a small fraction of the collected light onto a fast camera, which provides the error signals for the actively controlled secondary mirror compensating for spacecraft jitter and other disturbances. The elliptical orbit of the spacecraft poses high demands on the thermo-mechanical stability. The varying size of the solar disk image requires a special false-light suppression architecture, which is briefly described. In combination with a heat-rejecting entrance window, the optical energy impinging on the polarimetric and spectral analysis system is efficiently reduced. We show how the design can preserve the diffraction-limited imaging performance over the design temperature range of -20°C to +60°C. The decentred hyperbolical mirrors require special measures for the inter-alignment and their alignment with respect to the mechanical structure. A system of alignment flats and mechanical references is used for this purpose. We will describe the steps of the alignment procedure, and the dedicated optical ground support equipment, which are needed to reach the diffraction limited performance of the telescope. We will also report on the verification of the telescope performance, both - in ambient condition - and in vacuum at different temperatures.

Proceedings Article | 5 January 2018 Open Access

Open Access

Paper

Definition of a metrology servo-system for a solar imaging fourier transform spectrometer working in the far UV (IFTSUV)

C. Ruiz de Galarreta Fanju, A. Philippon, M. Bouzit, T. Appourchaux, J.-C. Vial, J.-P. Maillard, P. Lemaire

Proceedings Volume 10564, 105643E (2018) https://doi.org/10.1117/12.2309263

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Proceedings Article | 20 November 2017 Open Access

Open Access

Paper

Conception and test of echoes, a spectro-imager dedicated to the seismology of Jupiter

L. Soulat, F.-X. Schmider, S. Robbe-Dubois, T. Appourchaux, P. Gaulme, Y. Bresson, J. Gay, J.-B. Daban, C. Gouvret

Proceedings Volume 10564, 105641V (2017) https://doi.org/10.1117/12.2309197

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Proceedings Article | 9 August 2016 Paper

Paper

Advances in the development of a Mach-Zehnder interferometric Doppler imager for seismology of giant planets

Ivan Gonçalves, François-Xavier Schmider, Yves Bresson, Julien Dejonghe, Olivier Preis, Sylvie Robbe-Dubois, Thierry Appourchaux, Patrick Boumier, Jean-Christophe Leclec'h, Gilles Morinaud, Patrick Gaulme, Jason Jackiewicz

Proceedings Volume 9908, 99083M (2016) https://doi.org/10.1117/12.2230982

KEYWORDS: Planets, Doppler effect, Jupiter, Polarization, Telescopes, Calibration, Velocity measurements, Prototyping, Point spread functions, Beam splitters

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Proceedings Article | 28 August 2014 Paper

Paper

Optical characterization of the breadboard narrowband prefilters for Solar Orbiter PHI

Carlos Dominguez-Tagle, Thierry Appourchaux, Claudia Ruiz de Galarreta, Jean-Jacques Fourmond, Anne Philippon, Jean-Christophe Le Clec'h, Mehdi Bouzit, Véronique Bommier, Regis Le Cocguen, Daniel Crussaire, Jean-Marie Malherbe

Proceedings Volume 9143, 91435G (2014) https://doi.org/10.1117/12.2070373

KEYWORDS: Fabry–Perot interferometers, Sun, Magnetism, Absorption, Space operations, Calibration, Solids, Polarimetry, Control systems, Spectroscopy

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Proceedings Article | 26 September 2013 Paper

Paper

SPICE EUV spectrometer for the Solar Orbiter mission

A. Fludra, D. Griffin, M. Caldwell, P. Eccleston, J. Cornaby, D. Drummond, W. Grainger, P. Greenway, T. Grundy, C. Howe, C. McQuirk, K. Middleton, O. Poyntz-Wright, A. Richards, K. Rogers, C. Sawyer, B. Shaughnessy, S. Sidher, I. Tosh, S. Beardsley, G. Burton, A. Marshall, N. Waltham, S. Woodward, T. Appourchaux, A. Philippon, F. Auchere, E. Buchlin, A. Gabriel, J.-C. Vial, U. Schühle, W. Curdt, D. Innes, S. Meining, H. Peter, S. Solanki, L. Teriaca, M. Gyo, V. Büchel, M. Haberreiter, D. Pfiffner, W. Schmutz, M. Carlsson, S. Haugan, J. Davila, P. Jordan, W. Thompson, D. Hassler, B. Walls, C. Deforest, J. Hanley, J. Johnson, P. Phelan, L. Blecha, H. Cottard, G. Paciotti, N. Autissier, Y. Allemand, K. Relecom, G. Munro, A. Butler, R. Klein, A. Gottwald

Proceedings Volume 8862, 88620F (2013) https://doi.org/10.1117/12.2027581

KEYWORDS: Mirrors, Sensors, Solar processes, Spectroscopy, Space operations, Plasmas, Sun, Extreme ultraviolet, Space telescopes, Telescopes

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Proceedings Article | 21 September 2012 Paper

Paper

Echoes: a new instrumental concept of spectro-imaging for Jovian seismology

L. Soulat, F.-X. Schmider, S. Robbe-Dubois, T. Appourchaux, Y. Bresson, J.-B. Daban, P. Gaulme, J. Gay, C. Gouvret

Proceedings Volume 8442, 84424M (2012) https://doi.org/10.1117/12.924875

KEYWORDS: Jupiter, Fourier transforms, Sensors, Image processing, Prototyping, Polarizers, Photons, Planets, Thermography, Phase shifts

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Proceedings Article | 17 September 2012 Paper

Paper

The EUI instrument on board the Solar Orbiter mission: from breadboard and prototypes to instrument model validation

J.-P. Halain, P. Rochus, E. Renotte, T. Appourchaux, D. Berghmans, L. Harra, U. Schühle, W. Schmutz, F. Auchère, A. Zhukov, C. Dumesnil, F. Delmotte, T. Kennedy, R. Mercier, D. Pfiffner, L. Rossi, J. Tandy, A. BenMoussa, P. Smith

Proceedings Volume 8443, 844307 (2012) https://doi.org/10.1117/12.924343

KEYWORDS: Sensors, Extreme ultraviolet, Optical filters, Prototyping, Coating, Instrument modeling, Thermal modeling, Cameras, Mirrors, Sun

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Proceedings Article | 13 September 2012 Paper

Paper

Metrology for a solar imaging Fourier transform spectrometer working in the far UV: from the instrumental concept to the first experimental results

C. Ruiz de Galarreta Fanjul, M. Bouzit, T. Appourchaux, K. Dassas, T. Viale, A. Philippon, J.-C. Vial, J.-P. Maillard

Proceedings Volume 8450, 84500D (2012) https://doi.org/10.1117/12.926027

KEYWORDS: Mirrors, Metrology, Ultraviolet radiation, Signal to noise ratio, Fourier transforms, Spectroscopy, Imaging spectroscopy, Interferometers, Sensors, Solar processes

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Proceedings Article | 1 October 2011 Paper

Paper

Echoes: a new instrumental concept of Doppler Spectro-Imager for the ESA mission project JUICE

L. Soulat, F.-X. Schmider, S. Robbe-Dubois, T. Appourchaux, Y. Bresson, J.-B. Daban, P. Gaulme, J. Gay, C. Gouvret

Proceedings Volume 8172, 81720V (2011) https://doi.org/10.1117/12.896710

KEYWORDS: Sensors, Jupiter, Doppler effect, Photons, Phase measurement, Prototyping, Thermography, Signal to noise ratio, Calibration, Spectroscopy

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Proceedings Article | 21 September 2011 Paper

Paper

Metrology for an imaging Fourier transform spectrometer working in the far-UV (IFTSUV)

C. Ruiz de Galarreta Fanjul, A. Philippon, J.-C. Vial, J.-P. Maillard, T. Appourchaux

Proceedings Volume 8169, 816907 (2011) https://doi.org/10.1117/12.896714

KEYWORDS: Mirrors, Metrology, Signal to noise ratio, Fourier transforms, Spectroscopy, Spectral resolution, Sun, Beam splitters, Modulation, Vacuum ultraviolet

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Proceedings Article | 29 July 2010 Paper

Paper

Definition of an imaging spectrometer meeting the needs of UV solar physics

C. Ruiz de Galarreta Fanjul, A. Philippon, J.-C. Vial, P. Lemaire, J.-P. Maillard, C. Buisset, T. Appourchaux, F. Auchère

Proceedings Volume 7732, 773236 (2010) https://doi.org/10.1117/12.864469

KEYWORDS: Spectral resolution, Ultraviolet radiation, Solar processes, Sensors, Mirrors, Imaging spectroscopy, Spectroscopy, Fourier transforms, Spatial resolution, Spectroscopes

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Proceedings Article | 29 July 2010 Paper

Paper

The technical challenges of the Solar-Orbiter EUI instrument

Jean-Philippe Halain, Pierre Rochus, Thierry Appourchaux, David Berghmans, Louise Harra, Udo Schühle, Frédéric Auchère, Andrei Zhukov, Etienne Renotte, Jean-Marc Defise, Laurence Rossi, Karl Fleury-Frenette, Lionel Jacques, Jean-François Hochedez, Ali Ben Moussa

Proceedings Volume 7732, 77320R (2010) https://doi.org/10.1117/12.857976

KEYWORDS: Sensors, Extreme ultraviolet, Optical filters, Multilayers, Mirrors, Prototyping, Imaging systems, Reflectivity, Sun, CMOS sensors

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Proceedings Article | 12 July 2008 Paper

Paper

Design of a Fabry-Perot interferometer for the SO/PHI instrument on Solar Orbiter

Clément Trosseille, Thierry Appourchaux, Jean-Jacques Fourmond

Proceedings Volume 7010, 701017 (2008) https://doi.org/10.1117/12.788310

KEYWORDS: Fabry–Perot interferometers, Sun, Fabry–Perot interferometry, Lithium niobate, Solar processes, Imaging systems, Telescopes, Photons, Collimation, Interferometers

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Proceedings Article | 15 September 2005 Paper

Paper

Innovative designs for the imaging suite on Solar Orbiter

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

Proceedings Volume 5901, 590115 (2005) https://doi.org/10.1117/12.620863

KEYWORDS: Sun, Mirrors, Telescopes, Imaging systems, Image resolution, Extreme ultraviolet, Sensors, Space operations, Coronagraphy, Space telescopes

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Proceedings Article | 4 February 2004 Paper

Paper

Development of imaging arrays for solar UV observations based on wide band gap materials

Udo Schuehle, Jean-Francois Hochedez, Jose Luis Pau, Carlos Rivera, Elias Munoz, Jose Alvarez, Jean-Paul Kleider, Philippe Lemaire, Thierry Appourchaux, Bernhard Fleck, Anthony Peacock, Mathias Richter, Udo Kroth, Alexander Gottwald, Marie-Claude Castex, Alain Deneuville, Pierre Muret, Milos Nesladek, Franck Omnes, Joachim John, Chris Van Hoof

Proceedings Volume 5171, (2004) https://doi.org/10.1117/12.507730

KEYWORDS: Sensors, Ultraviolet radiation, Diamond, Vacuum ultraviolet, Charge-coupled devices, Microchannel plates, Photodiodes, Imaging arrays, Visible radiation, Photons

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Proceedings Article | 11 February 2003 Paper

Paper

New UV detectors for solar observations

Jean-Francois Hochedez, Udo Schuehle, Jose Pau, Jose Alvarez, Olivier Hainaut, Thierry Appourchaux, F. Auret, Andrei Belsky, Philippe Bergonzo, M. Castex, A. Deneuville, Pierre Dhez, Bernhard Fleck, Ken Haenen, Mourad Idir, Jean Paul Kleider, Elie Lefeuvre, Philippe Lemaire, E. Monroy, P. Muret, Elias Munoz, Milos Nesladek, Franck Omnes, Emanuele Pace, Anthony Peacock, Chris Van Hoof

Proceedings Volume 4853, (2003) https://doi.org/10.1117/12.460367

KEYWORDS: Sensors, Ultraviolet radiation, Diamond, Sun, Extreme ultraviolet, Imaging systems, Ultraviolet detectors, Quantum efficiency, Silicon, Charge-coupled devices

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SPIE Journal Paper | 1 May 1994

Effect of gamma-ray irradiations on optical filter glass

Thierry Appourchaux, Georges Gourmelon, Bengt Johlander

OE, Vol. 33, Issue 05, (May 1994) https://doi.org/10.1117/12.10.1117/12.164329

KEYWORDS: Glasses, Optical filters, Absorption, Transmittance, Color centers, Radiation effects, Aerospace engineering, Electrons, Crystals, Information operations

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Proceedings Article | 6 December 1993 Paper

Paper

Effect of space radiations on optical filters

Thierry Appourchaux

Proceedings Volume 2018, (1993) https://doi.org/10.1117/12.165241

KEYWORDS: Glasses, Optical filters, Transmittance, Solar processes, Radiation effects, Annealing, Optical coatings, Adhesives, Zinc, Optical design

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SPIE Journal Paper | 1 August 1992

Passive thermal control of a multilayer filter for space-based solar observations

Thierry Appourchaux, Massimo Cislaghi

OE, Vol. 31, Issue 08, (August 1992) https://doi.org/10.1117/12.10.1117/12.58714

KEYWORDS: Optical filters, Glasses, Thermography, Thermal modeling, Reflectivity, Absorption filters, Transmittance, Ultraviolet radiation, Optical coatings, Multilayers

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Proceedings Article | 1 July 1992 Paper

Paper

Temperature dependence of silicon photodiode quantum efficiency: theoretical and experimental results

Thierry Appourchaux, Didier Martin, Udo Telljohann

Proceedings Volume 1679, (1992) https://doi.org/10.1117/12.60488

KEYWORDS: Quantum efficiency, Sensors, Ions, Photodiodes, Silicon, Absorption, Temperature metrology, Diffusion, Physics, Diodes

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Showing 5 of 25 publications

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