Mr. Louis-Philippe Bibeau Profile

Louis-Philippe Bibeau

at ABB Inc

SPIE Involvement:

Author

Publications (3)

Proceedings Article | 13 December 2020 Poster + Paper

Design of a novel cryogenic stiffness-compensated reactionless scan mechanism for the Fourier transform spectrometer of SPICA SAFARI instrument

Alain Cournoyer, Éric Carbonneau, Patrick Gilbert, Louis-Philippe Bibeau, Simon Houle, Hugo Bourque, Ian Silversides, Frédéric Grandmont, David Naylor, Brad Gom, Sudhakar Gunuganti, Dennis van Loon, Willem Jellema

Proceedings Volume 11453, 1145338 (2020) https://doi.org/10.1117/12.2560530

KEYWORDS: Cryogenics, Fourier transforms, Spectroscopy, Mirrors, Spectral resolution, Interferometers, Cryogenic mechanisms, Mechatronics, Mirror stabilization, Control systems

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Proceedings Article | 11 January 2018 Open Access

Alignment monitoring system for ASTRO-H

Frédéric Grandmont, Fabien Dupont, Louis Moreau, Martin Larouche, Louis-Philippe Bibeau, Sylvio Laplante

Proceedings Volume 10565, 1056557 (2018) https://doi.org/10.1117/12.2309127

KEYWORDS: Sensors, X-rays, Imaging systems, Optical benches, Amplitude modulation, X-ray optics, Hard x-rays, Astronomical imaging, Observatories, X-ray imaging

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High Energy Astrophysics (HEA) encompasses a broad range of astrophysical science, with sources that include stars and stellar clusters, compact objects (black holes, neutron stars, and white dwarfs), supernova remnants, the interstellar medium, galaxies and clusters of galaxies, Active Galactic Nuclei (AGN), and gamma ray bursters, as well as a variety of fundamental physical processes. The physics involved includes extremes of gravity, density and magnetic field and is often inaccessible via any other waveband. HEA investigates and answers crucial questions in all fields of contemporary astrophysics.

Unlike the focusing of radio and optical light, X-rays are brought to focus through shallow, grazing incident angles. The analogy of skimming a stone across a pond is appropriate in describing how X-rays are focused. The higher the energy of the X-ray photon the shallower the incident angle must be, thereby introducing the requirement of longer focal lengths for focusing high-energy X-rays (E > 10 keV). This technical challenge has hindered scientific advancement in the high-energy regime, while at lower X-ray energies the community has prospered immensely with spectacular data from focusing observatories like XMM-Newton, Chandra, and Suzaku. Now, with ASTRO-H, the community will reap similar rewards from the tremendous improvement in spatial and spectral resolution at high energies. ASTRO-H is a JAXA mission. More information can be found on the ASTRO-H web site [1].

Because of the grazing-angle optics, high-energy X-ray instruments have a long focal length. The Hard X-ray Imager (HXI) of ASTRO-H has its detector housed in a boom that will extend by about 6 m in orbit so that a focal length of 12 m can be achieved for that instrument. This long structure will inevitably oscillate and flex, especially when passing across the orbital day/night boundary. In order to retain the essential imaging resolution, it is important that the boom has a metrology system that measures this flexion in order to allow post-acquisition compensation in generating the science images. In the current paper, we describe a possible Alignment Monitoring System (AMS) to measure in real time the relative position of the boom. The AMS will be an important element to guaranty that the ASTRO-H observatory will meet its performance requirements.

The Canadian Space Agency has the intention of providing the AMS to the ASTRO-H mission. The current paper reports a study that was conducted to support that intention.

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Proceedings Article | 23 September 2009 Paper

Development activities for interferometer-based hyperspectral sounder instrument

Philippe Giaccari, Frederic Grandmont, Jacques Giroux, Louis-Phillipe Bibeau, James Veilleux, Martin Larouche

Proceedings Volume 7474, 74741K (2009) https://doi.org/10.1117/12.830482

KEYWORDS: Interferometers, Beam splitters, Servomechanisms, Sensors, Finite element methods, Optical coatings, Fourier transforms, Satellites, Prototyping, Hyperspectral imaging

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