Dr. Ray Fairbend Profile

Dr. Ray Fairbend

at Photonis France SAS

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 31 August 2022 Presentation + Paper

Presentation + Paper

Calibration of the flight model lobster eye optic for SVOM

Charlotte Feldman, Richard Willingale, James Pearson, Gillian Butcher, Philip Peterson, Tony Crawford, Paul Houghton, Roisin Speight, Alexander Lodge, Christopher Bicknell, Julian Osborne, Paul O'Brien, Miranda Bradshaw, Vadim Burwitz, Gisela Hartner, Andreas Langmeier, Thomas Mueller, Surangkhana Rukdee, Thomas Schmidt, Diego Götz, Karine Mercier, Jean-Michel Le Duigou, François Gonzalez, Emile Schyns, Romain Roudot, Ray Fairbend, Julien Seguy

Proceedings Volume 12181, 121811P (2022) https://doi.org/10.1117/12.2628635

KEYWORDS: X-ray telescopes, X-rays, Calibration, Point spread functions, X-ray optics, Telescopes

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

The development of the THESEUS SXI optics

Charlotte Feldman, Paul O'Brien, Richard Willingale, Emile Schyns, Romain Roudot, Ray Fairbend, Julien Séguy, Hannah Lerman, Ian Hutchinson, Melissa McHugh, Alexander Lodge, Roisin Speight

Proceedings Volume 11444, 114448X (2020) https://doi.org/10.1117/12.2562141

KEYWORDS: X-rays, Gamma radiation, X-ray detectors, X-ray optics, Detector development, Eye, CMOS sensors, Spherical lenses, Manufacturing, Optical design

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Proceedings Article | 6 July 2018 Presentation + Paper

Presentation + Paper

Microchannel plate x-ray optics on the Mercury imaging x-ray spectrometer

Adrian Martindale, James Pearson, Charlotte Feldman, Gillian Butcher, Richard Willingale, Ray Fairbend, Emile Schyns, Emma Bunce

Proceedings Volume 10699, 106990W (2018) https://doi.org/10.1117/12.2314842

KEYWORDS: X-rays, Microchannel plates, Sensors, X-ray optics, Collimators, Point spread functions, Ray tracing, Reflection, Geometrical optics, X-ray imaging

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Proceedings Article | 21 November 2017 Open Access

Open Access

Paper

X-ray pore optic developments

Kotska Wallace, Marcos Bavdaz, Maximilien Collon, Marco Beijersbergen, Stefan Kraft, Ray Fairbend, Julien Séguy, Pascal Blanquer, Roland Graue, Dirk Kampf

Proceedings Volume 10567, 105670U (2017) https://doi.org/10.1117/12.2308040

KEYWORDS: X-ray optics, X-rays, Optics manufacturing, Mirrors, Glasses, Silicon, Geometrical optics, Semiconducting wafers, Polishing, X-ray telescopes

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Proceedings Article | 31 August 2017 Paper

Paper

Testing and modelling of the SVOM MXT narrow field lobster-eye telescope

Charlotte Feldman, James Pearson, Richard Willingale, John Sykes, Paul Drumm, Paul Houghton, Chris Bicknell, Julian Osborne, Adrian Martindale, Paul O'Brien, Ray Fairbend, Emile Schyns, Sylvain Petit, Romain Roudot, Karine Mercier, Jean-Michel Le Duigou, Diego Gotz

Proceedings Volume 10399, 103991Q (2017) https://doi.org/10.1117/12.2273416

KEYWORDS: Space telescopes, Telescopes, X-ray telescopes, Modeling, Eye, Microchannel plates, X-rays, Optical instrument design, Point spread functions, X-ray astronomy

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Proceedings Article | 18 July 2016 Paper

Paper

Aberrations in square pore micro-channel optics used for x-ray lobster eye telescopes

R. Willingale, J. Pearson, A. Martindale, C. Feldman, R. Fairbend, E. Schyns, S. Petit, J. Osborne, P. O'Brien

Proceedings Volume 9905, 99051Y (2016) https://doi.org/10.1117/12.2232946

KEYWORDS: X-ray optics, X-ray telescopes, X-ray optics, Eye, X-rays, X-ray telescopes, Optics manufacturing, Manufacturing, Spatial resolution, Spherical lenses, Microchannel plates, Reflection

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Proceedings Article | 11 September 2009 Paper

Paper

The Mercury Imaging X-ray Spectrometer: instrument overview

A. Martindale, J. Pearson, C. Whitford, G. Fraser, D. Rothery, D. Talboys, J. Carpenter, T. Stevenson, E. Bunce, R. Fairbend, J. Seguy, E. Sclater, I. Delgado, A. Dixon, J. Treis, J. Mas-Hesse, J. San Juan, K. Muinonen, C. Sawyers, C. Bulloch, E. Schyns

Proceedings Volume 7441, 744115 (2009) https://doi.org/10.1117/12.826052

KEYWORDS: Mercury (planet), X-rays, Spatial resolution, Spectroscopy, Planets, Iron, X-ray fluorescence spectroscopy, Microchannel plates, Collimators, Image resolution

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Proceedings Article | 11 September 2009 Paper

Paper

The Mercury Imaging X-ray Spectrometer: optics design and characterisation

A. Martindale, J. Pearson, G. Fraser, J. Carpenter, R. Willingale, T. Stevenson, C. Whitford, F. Giannini, R. Fairbend, J. Seguy, E. Sclater, I. Delgado, M. Kaipiainen, S. Nenonen, T. Pilvi, E. Schyns, C. Bulloch, C. Sawyers, K. Muinonen

Proceedings Volume 7441, 744117 (2009) https://doi.org/10.1117/12.826083

KEYWORDS: Microchannel plates, X-rays, Sensors, X-ray optics, Collimators, X-ray imaging, Telescopes, Space telescopes, Spectroscopy, Mercury

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Proceedings Article | 20 September 2007 Paper

Paper

X-ray imaging glass micro-pore optics

Maximilien Collon, Marco Beijersbergen, Kotska Wallace, Marcos Bavdaz, Ray Fairbend, Julien Séguy, Emile Schyns, Michael Krumrey, Michael Freyberg

Proceedings Volume 6688, 668812 (2007) https://doi.org/10.1117/12.734476

KEYWORDS: X-rays, X-ray optics, Glasses, Sensors, Mirrors, Metrology, Spatial resolution, X-ray imaging, Surface roughness, Grazing incidence

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Proceedings Article | 21 February 2007 Paper

Paper

Micro-pore optics: from planetary x-rays to industrial market

Jean-Luc Mutz, Olivier Bonnet, Ray Fairbend, Emile Schyns, Julien Seguy

Proceedings Volume 6479, 64790F (2007) https://doi.org/10.1117/12.699576

KEYWORDS: X-rays, X-ray optics, Glasses, Etching, Optics manufacturing, X-ray imaging, Metrology, X-ray technology, Aerospace engineering, Reflectivity

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Proceedings Article | 13 June 2006 Paper

Paper

Developments in glass micro-pore optics for x-ray applications

Kotska Wallace, Maximilien Collon, Marcos Bavdaz, Ray Fairbend, Julien Séguy, Michael Krumrey

Proceedings Volume 6266, 62661A (2006) https://doi.org/10.1117/12.670190

KEYWORDS: X-rays, X-ray optics, Optics manufacturing, Glasses, Reflection, Nickel, X-ray imaging, Scanning electron microscopy, Microchannel plates, Etching

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ESA is developing technologies for x-ray imaging to reduce the mass and volume of future missions. Applications of x-ray optics are foreseen in future planetary x-ray imagers, x-ray timing observatories and in observatories for high-energy astrophysics. With reference to planetary x-ray imagers the use of glass micro-pore material is being investigated. This technology allows the formation of a monolithic, glass structure that can be used to focus x-rays by glancing reflections off the pore walls. A technique to form x-ray focusing plates that contain thousands of square micro-pores has been developed with Photonis. The square pores are formed in a process that fuses blocks of extruded square fibres, which can then be sliced, etched and slumped to form the segment of an optic with a specific radius. A proposed imager would be created from 2 optics, slumped with different radii, and mounted to form an approximation of a Wolter I optic configuration. Reflection can be improved by coating the channel surfaces with a heavy element, such as nickel. Continuing developments have been made to enhance the manufacturing processes and improve the characteristics of the manufactured x-ray focusing plates, such as improved surface roughness and squareness of pore walls, improved pore alignment from fibre stacking through to optic segment slumping and development of pore wall coatings. In order to measure improvements x-ray measurements are performed by ESA and cosine Research BV, using the BESSY-II synchrotron facility four-crystal monochromator beamline of the Physikalisch-Technische Bundesanstalt, on multifibres, sectors and slumped sectors. A probing beam is used to investigate a number of pores to determine x-ray transmission, focussing characteristics as they relate to the overall transmission, x-ray reflectivity of channel walls, radial alignment of fibres, slumping radius and fibre position in a fused block. SEM measurements and microscope inspection have also been used to inspect the channel walls and determine improvements made in fibre stacking and coating.

Proceedings Article | 8 September 2005 Paper

Paper

Development of micro-pore optics for x-ray applications

Kotska Wallace, Maximilien Collon, Marcos Bavdaz, Marco Beijersbergen, Ray Fairbend, Julien Seguy, Michael Hoffmann, Michael Krumrey

Proceedings Volume 5900, 590011 (2005) https://doi.org/10.1117/12.614939

KEYWORDS: X-ray optics, X-rays, Optics manufacturing, Nickel, Reflectivity, Reflection, Glasses, X-ray imaging, Etching, Manufacturing

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Proceedings Article | 4 November 2004 Paper

Paper

Development of x-ray pore optics: novel high-resolution silicon millipore optics for XEUS and ultralow mass glass micropore optics for imaging and timing

Marco Beijersbergen, Stefan Kraft, Marcos Bavdaz, David Lumb, Ramses Guenther, Maximilien Collon, Arjan Mieremet, Ray Fairbend, Anthony Peacock

Proceedings Volume 5539, (2004) https://doi.org/10.1117/12.552942

KEYWORDS: X-ray optics, Glasses, Semiconducting wafers, Silicon, Wafer-level optics, X-rays, Mirrors, Optical fibers, Cladding, Reflection

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Proceedings Article | 29 January 2004 Paper

Paper

Progress at ESA on high-energy optics technologies

Marcos Bavdaz, Anthony Peacock, Enrico Tomaselli, Marco Beijersbergen, Maximilien Collon, Sven-Olof Flyckt, Ray Fairbend, Jean-Pierre Boutot

Proceedings Volume 5168, (2004) https://doi.org/10.1117/12.506928

KEYWORDS: X-ray optics, Microchannel plates, Mirrors, Glasses, Metrology, Spatial resolution, Astrophysics, X-rays, Space operations, Cladding

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The Science Payload and Advance Concepts Office of the Science Directorate of the European Space Agency is responsible for developing and conducting a coherent and strategic technology program so as to ensure the feasibility of innovative advanced concepts for future science missions. These missions cover a wide range of disciplines ranging from astrophysics and fundamental physics to solar and planetary research, including exo-biology. The underpinning technology research and development is being conducted in collaboration with European industry and research institutes. The field of high energy photon optics for space applications has demonstrated substantial progress in the past decades, but continues to face very interesting challenges for the future missions. Low specific mass (mass per effective collecting area) is the driving parameter for most future mission designs, both for space based astrophysics observatories and planetary missions. New technologies have to be explored for future applications, simultaneously achieving good angular resolution and low mass. The next generation of high energy astrophysics missions will require the development of much improved optical systems for the x-ray range, and the introduction of focussing imaging systems in the gamma-ray regime. While adequate detection systems are already available, or in the process of refinement and optimization, the optical systems have posed the main hurdle in the design of new space missions. In this paper one potential alternative to the production of very lightweight X-ray optics, which is being investigated by ESA and its industrial partners, is discussed. First the applicability of the required optical design is addressed, followed by the currently ongoing work on the production facilities. Finally the impact of such optics on mission design is investigated based on the example of the X-ray Evolving Universe Spectroscopy mission XEUS. The cosmology mission XEUS requires very large effective area, 30 m² at 1 keV, X-ray optics with high angular resolution of below 5" with a goal of 2". This implies a large aperture for a single telescope system, which will necessarily require assembly or deployment in space, and which will be formed by basic mirror modules known a petals. The petals must remain compatible with compact ground handling and production tools and will require minimum modifications to existing calibration facilities. Such optics are also envisaged for applications such as astrophysics observatories placed in very deep orbits or in the field of planetary remote sensing. In the latter application there are even stronger mass constraints although a more relaxed angular resolution requirement (e.g. arc minutes compared to arc seconds). Such optics systems have as a single common feature a dramatically reduced mirror thickness and therefore mass.

Proceedings Article | 5 January 2001 Paper

Paper

High-resolution micropore x-ray optics produced with microchannel plate technology

Marco Beijersbergen, Marcos Bavdaz, Anthony Peacock, Enrico Tomaselli, R. Fairbend, J.-P. Boutot, Sven Flyckt, A. Brunton, G. Price, George Fraser, C. Herrmann, Michael Krumrey, Eric Ziegler, Andreas Freund

Proceedings Volume 4145, (2001) https://doi.org/10.1117/12.411636

KEYWORDS: X-ray optics, Optical fibers, X-rays, Image quality, Reflection, Glasses, X-ray telescopes, Surface roughness, Prototyping, X-ray astronomy

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Proceedings Article | 13 December 2000 Paper

Paper

Characteristics of Photonis 6-um pore microchannel plates

James Pearson, Adam Brunton, Adrian Martin, George Fraser, John Lees, J.-P. Boutot, R. Fairbend, Sven Flyckt

Proceedings Volume 4140, (2000) https://doi.org/10.1117/12.409114

KEYWORDS: Microchannel plates, Sensors, Glasses, Quantum efficiency, X-rays, Resistance, Manufacturing, Standards development, Aerospace engineering, X-ray detectors

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Proceedings Article | 18 July 2000 Paper

Paper

Novel micropore x-ray optics produced with microchannel plate technology

Marco Beijersbergen, Marcos Bavdaz, Anthony Peacock, Enrico Tomaselli, George Fraser, Adam Brunton, G. Price, Michael Krumrey, Clemens Herrmann, Andreas Freund, Eric Ziegler, Alexei Souvorov, R. Fairbend, J.-P. Boutot, Sven Flyckt

Proceedings Volume 4012, (2000) https://doi.org/10.1117/12.391557

KEYWORDS: X-ray optics, Optical fibers, X-rays, Glasses, Image quality, Surface roughness, Microchannel plates, Spatial resolution, Cladding, Polishing

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Showing 5 of 17 publications

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