Prof. Alan A. Wells Profile

Prof. Alan A. Wells

Head of Space Projects

SPIE Involvement:

Author

Publications (37)

Proceedings Article | 13 September 2007 Paper

Paper

The operation and evolution of the swift x-ray telescope

Jamie Kennea, D. Burrows, C. Pagani, J. Hill, J. Racusin, D. Morris, A. Abbey, A. Beardmore, S. Campana, G. Chincarini, G. Cusumano, P. Evans, N. Gehrels, O. Godet, T. Mineo, V. La Parola, V. Mangano, A. Moretti, J. Nousek, J. Osborne, K. Page, M. Perri, P. Romano, R. L. C. Starling, G. Tagliaferri, F. Tamburelli, A. Wells

Proceedings Volume 6686, 668608 (2007) https://doi.org/10.1117/12.734394

KEYWORDS: Charge-coupled devices, X-rays, X-ray telescopes, Switching, Contamination, X-ray imaging, Gamma radiation, Space telescopes, X-ray optics, Calibration

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Proceedings Article | 15 June 2006 Paper

Paper

Effects of micrometeoroid and space debris impacts in grazing incidence telescopes

A. Abbey, R. Ambrosi, A. Wells

Proceedings Volume 6266, 62663K (2006) https://doi.org/10.1117/12.677410

KEYWORDS: Particles, Mirrors, Space telescopes, Grazing incidence, X-ray telescopes, Charge-coupled devices, Telescopes, Sensors, Space operations, Scattering

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Proceedings Article | 19 August 2005 Paper

Paper

The in-flight spectroscopic performance of the Swift XRT CCD camera

Julian Osborne, A. Beardmore, O. Godet, A. Abbey, M. Goad, K. Page, A. Wells, L. Angelini, D. Burrows, S. Campana, G. Chincarini, O. Citterio, G. Cusumano, P. Giommi, J. Hill, J. Kennea, V. LaParola, V. Mangano, T. Mineo, A. Moretti, J. Nousek, C. Pagani, M. Perri, P. Romano, G. Tagliaferri, F. Tamburelli

Proceedings Volume 5898, 589817 (2005) https://doi.org/10.1117/12.617149

KEYWORDS: Charge-coupled devices, Calibration, X-rays, Matrices, CCD cameras, Spectroscopy, Molybdenum, Spectral calibration, X-ray telescopes, Absorption

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Proceedings Article | 18 August 2005 Paper

Paper

Absolute timing with the SWIFT X-ray telescope (XRT)

G. Cusumano, V. Mangano, T. Mineo, V. La Parola, A. La Barbera, S. Campana, G. Chincarini, G. Tagliaferri, A. Moretti, P. Romano, M. Capalbi, M. Perri, P. Giommi, D. Burrows, D. Morris, J. Hill, J. Kennea, J. Nousek, C. Pagani, L. Angelini, J. Osborne, A. Abbey, A. Beardmore, M. Goad, K. Page, A. Wells

Proceedings Volume 5898, 58981A (2005) https://doi.org/10.1117/12.616603

KEYWORDS: X-ray telescopes, X-rays, Calibration, Sensors, Charge-coupled devices, X-ray astronomy, Photodiodes, Space telescopes, Data centers, Gamma radiation

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Proceedings Article | 18 August 2005 Paper

Paper

The unique observing capabilities of the SWIFT x-ray telescope

J. Hill, L. Angelini, D. Morris, D. Burrows, A. Abbey, S. Campana, M. Capalbi, G. Cusumano, J. Kennea, R. Klar, C. Mangels, A. Moretti, J. Osborne, M. Perri, J. Racusin, G. Tagliaferri, F. Tamburelli, P. Wood, J. Nousek, A. Wells

Proceedings Volume 5898, 589815 (2005) https://doi.org/10.1117/12.618026

KEYWORDS: Space operations, Switches, Charge-coupled devices, Photodiodes, Calibration, Space telescopes, X-ray telescopes, Telescopes, X-rays, Gamma radiation

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Proceedings Article | 18 August 2005 Paper

Paper

Controlling the Swift XRT CCD temperature via passive cooling

Jamie Kennea, D. Burrows, A. Wells, C. Pagani, J. Hill, J. Racusin, D. Morris, S. Hunsberger, A. Abbey, A. Beardmore, S. Campana, M. Chester, G. Chincarini, G. Cusumano, N. Gehrels, O. Godet, T. Mineo, V. La Parola, V. Mangano, A. Moretti, J. Nousek, J. Osborne, K. Page, M. Perri, G. Tagliaferri, F. Tamburelli

Proceedings Volume 5898, 589816 (2005) https://doi.org/10.1117/12.617681

KEYWORDS: Charge-coupled devices, X-ray telescopes, Space operations, Sensors, X-rays, Software development, Gamma radiation, X-ray optics, CCD image sensors, Switches

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Proceedings Article | 18 August 2005 Paper

Paper

In-flight calibration of the SWIFT XRT effective area

P. Romano, G. Cusumano, S. Campana, V. Mangano, A. Moretti, A. Abbey, L. Angelini, A. Beardmore, D. Burrows, M. Capalbi, G. Chincarini, O. Citterio, P. Giommi, M. Goad, O. Godet, G. Hartner, J. Hill, J. Kennea, V. LaParola, T. Mineo, D. Morris, J. Nousek, J. Osborne, K. Page, C. Pagani, M. Perri, G. Tagliaferri, F. Tamburelli, A. Wells

Proceedings Volume 5898, 589819 (2005) https://doi.org/10.1117/12.616974

KEYWORDS: Calibration, X-rays, Vignetting, X-ray telescopes, Astronomy, Mirrors, Charge-coupled devices, Point spread functions, X-ray astronomy, Gamma radiation

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Proceedings Article | 18 August 2005 Paper

Paper

In–flight calibration of the Swift XRT Point Spread Function

Alberto Moretti, Sergio Campana, T. Mineo, Patrizia Romano, A. Abbey, L. Angelini, A. Beardmore, W. Burkert, D. Burrows, M. Capalbi, G. Chincarini, O. Citterio, G. Cusumano, M. Freyberg, P. Giommi, M. Goad, O. Godet, G. Hartner, J. Hill, J. Kennea, V. La Parola, V. Mangano, D. Morris, J. Nousek, J. Osborne, K. Page, C. Pagani, M. Perri, G. Tagliaferri, F. Tamburelli, A. Wells

Proceedings Volume 5898, 589818 (2005) https://doi.org/10.1117/12.617164

KEYWORDS: Point spread functions, Calibration, Data modeling, Sensors, X-ray telescopes, Telescopes, Spectroscopy, Gamma radiation, X-rays, Mirrors

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Proceedings Article | 11 October 2004 Paper

Paper

The SWIFT Gamma-Ray Burst Observatory

Alan Wells, Neil Gehrels, Nicholas White, Scott Barthelmy, John Nousek, David Burrows, Peter Roming, Keith Mason, Guido Chincarini, Paolo Giommi

Proceedings Volume 5488, (2004) https://doi.org/10.1117/12.583183

KEYWORDS: Sensors, Space operations, Telescopes, Space telescopes, Gamma radiation, X-rays, Mirrors, Charge-coupled devices, X-ray telescopes, Observatories

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Proceedings Article | 3 February 2004 Paper

Paper

Swift XRT effective area measured at the Panter end-to-end tests

Gianpiero Tagliaferri, Alberto Moretti, Sergio Campana, Anthony Abbey, Richard Ambrosi, Lorella Angelini, Andrew Beardmore, Heinrich Brauninger, Wolfgang Burkert, David Burrows, Milvia Capalbi, Guido Chincarini, Oberto Citterio, Giancarlo Cusumano, Michael Freyberg, Paolo Giommi, Gisela Hartner, Joanne Hill, Koji Mori, Dave Morris, Kallol Mukerjee, John Nousek, Julian Osborne, Alexander Short, F. Tamburelli, D. Watson, Alan Wells

Proceedings Volume 5165, (2004) https://doi.org/10.1117/12.504835

KEYWORDS: Calibration, Vignetting, Charge-coupled devices, Mirrors, Telescopes, Contamination, Quantum efficiency, X-rays, Sensors, Ray tracing

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Proceedings Article | 3 February 2004 Paper

Paper

SWIFT XRT point spread function measured at the Panter end-to-end tests

Alberto Moretti, Sergio Campana, Gianpiero Tagliaferri, Anthony Abbey, Richard Ambrosi, Lorella Angelini, Andrew Beardmore, Heinrich Brauninger, Wolfgang Burkert, David Burrows, Milvia Capalbi, Guido Chincarini, Oberto Citterio, Giancarlo Cusumano, Michael Freyberg, Paolo Giommi, Gisela Hartner, Joanne Hill, Koji Mori, Dave Morris, Kallol Mukerjee, John Nousek, Julian Osborne, Alexander Short, Francesca Tamburelli, D. Watson, Alan Wells

Proceedings Volume 5165, (2004) https://doi.org/10.1117/12.504857

KEYWORDS: Point spread functions, Calibration, Mirrors, Data modeling, Sensors, Charge-coupled devices, X-rays, Telescopes, Spectroscopy, Gamma radiation

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Proceedings Article | 3 February 2004 Paper

Paper

The Swift X-Ray Telescope

David Burrows, Joanne Hill, John Nousek, Alan Wells, Guido Chincarini, Anthony Abbey, Andrew Beardmore, J. Bosworth, Heinrich Brauninger, Wolfgang Burkert, Sergio Campana, Milvia Capalbi, W. Chang, Oberto Citterio, Michael Freyberg, Paolo Giommi, Gisela Hartner, Ronnie Killough, B. Kittle, R. Klar, C. Mangels, M. McMeekin, B. Miles, Alberto Moretti, Koji Mori, Dave Morris, Kallol Mukerjee, Julian Osborne, Alexander Short, Gianpiero Tagliaferri, Francesca Tamburelli, D. Watson, Richard Willingale, Michael Zugger

Proceedings Volume 5165, (2004) https://doi.org/10.1117/12.504868

KEYWORDS: Mirrors, Charge-coupled devices, Calibration, X-rays, Telescopes, Space telescopes, Sensors, Clocks, Cameras, X-ray telescopes

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Proceedings Article | 3 February 2004 Paper

Paper

A spectroscopic performance of the Swift X-ray Telescope for gamma-ray burst afterglow studies

Kallol Mukerjee, Julian Osborne, Alan Wells, Anthony Abbey, Andrew Beardmore, Alexander Short, Richard Ambrosi, Alberto Moretti

Proceedings Volume 5165, (2004) https://doi.org/10.1117/12.507852

KEYWORDS: Charge-coupled devices, X-rays, X-ray telescopes, Silicon, Calibration, Monte Carlo methods, Photon counting, Quantum efficiency, Matrices, Sensors

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Proceedings Article | 3 February 2004 Paper

Paper

Readout modes and automated operation of the Swift X-ray Telescope

Joanne Hill, David Burrows, John Nousek, Anthony Abbey, Richard Ambrosi, Heinrich Brauninger, Wolfgang Burkert, Sergio Campana, Chaitanya Cheruvu, Giancarlo Cusumano, Michael Freyberg, Gisela Hartner, R. Klar, C. Mangels, Alberto Moretti, Koji Mori, Dave Morris, Alexander Short, Gianpiero Tagliaferri, D. Watson, P. Wood, Alan Wells

Proceedings Volume 5165, (2004) https://doi.org/10.1117/12.505728

KEYWORDS: Switches, X-ray telescopes, Switching, Charge-coupled devices, X-rays, Photodiodes, Photon counting, Spectroscopy, Point spread functions, Gamma radiation

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Proceedings Article | 11 March 2003 Paper

Paper

Swift x-ray telescope (XRT)

David Burrows, Joanne Hill, John Nousek, Alan Wells, Alexander Short, Richard Ambrosi, Guido Chincarini, Oberto Citterio, G. Tagliaferri

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461279

KEYWORDS: Space telescopes, Charge-coupled devices, Cameras, X-ray telescopes, Sensors, Telescopes, Mirrors, Calibration, X-rays, Sun

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Proceedings Article | 11 March 2003 Paper

Paper

Algorithm for locating PSF-like events and computing the centroid in x-ray images

Joanne Hill, Chaitanya Cheruvu, Anthony Abbey, Richard Ambrosi, David Burrows, Alexander Short, Alan Wells, John Nousek

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461495

KEYWORDS: Point spread functions, X-rays, Gamma radiation, X-ray telescopes, Mirrors, Charge-coupled devices, X-ray imaging, Cameras, Spectroscopy, Space operations

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Proceedings Article | 26 February 2003 Paper

Paper

Performance characteristics of the PAW instrumentation on Beagle 2: the astrobiology lander on ESA's Mars Express Mission

Mark Sims, D. Pullan, George Fraser, S. Whitehead, J. Sykes, J. Holt, Gillian Butcher, Nick Nelms, J. Dowson, D. Ross, C. Bicknell, M. Crocker, B. Favill, Alan Wells, L. Richter, H. Kochan, Hans Hamacher, L. Ratke, Andrew Griffiths, A. Coates, N. Phillips, A. Senior, John Zarnecki, M. Towner, M. Leese, M. Patel, C. Wilson, Nicolas Thomas, S. Hviid, Jean-Luc Josset, G. Klingelhoefer, B. Bernhardt, P. van Duijn, G. Sims, K. Yung

Proceedings Volume 4859, (2003) https://doi.org/10.1117/12.457319

KEYWORDS: Mars, Spectrometers, Cameras, Statistical analysis, Sensors, Soil science, Astrobiology, Electronics, Imaging systems, Stereoscopic cameras

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Proceedings Article | 25 January 2002 Paper

Paper

Centroiding and point response function measurements of the mirror/detector combination for the x-ray telescope on the SWIFT gamma-ray burst explorer

Richard Ambrosi, Anthony Abbey, Ian Hutchinson, Richard Willingale, Sergio Campana, Giancarlo Cusumano, Wolfgang Burkert, Alan Wells, Alexander Short, Oberto Citterio, Mauro Ghigo, G. Tagliaferri, Heinrich Braeuninger

Proceedings Volume 4497, (2002) https://doi.org/10.1117/12.454228

KEYWORDS: Point spread functions, X-rays, Mirrors, Charge-coupled devices, Calibration, Cameras, X-ray telescopes, Gamma radiation, Particles, Image processing

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Proceedings Article | 29 December 2000 Paper

Paper

Instrumentation on Beagle 2: the astrobiology lander on ESA's 2003 Mars Express mission

Mark Sims, C. Pillinger, I. Wright, G. Morgan, I. Praine, George Fraser, D. Pullan, S. Whitehead, J. Dowson, Alan Wells, L. Richter, H. Kochan, Hans Hamacher, A. Griffiths, A. Coates, S. Peskett, A. Brack, J. Clemmet, R. Slade, N. Phillips, C. Berry, A. Senior, John Zarnecki, Mark Towner, M. Leese, Aaron Zent, Nicolas Thomas, Jean-Luc Josset, G. Klingelhoefer, P. van Duijn, G. Sims

Proceedings Volume 4137, (2000) https://doi.org/10.1117/12.411619

KEYWORDS: Mars, Sensors, Electronics, Statistical analysis, Spectrometers, Temperature metrology, Iron, X-rays, Soil science, Astrobiology

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Proceedings Article | 13 December 2000 Paper

Paper

Swift X-Ray Telescope

David Burrows, Joanne Hill, John Nousek, Alan Wells, Alexander Short, Richard Willingale, Oberto Citterio, Guido Chincarini, G. Tagliaferri

Proceedings Volume 4140, (2000) https://doi.org/10.1117/12.409158

KEYWORDS: Charge-coupled devices, Mirrors, Calibration, X-rays, Sensors, Clocks, X-ray telescopes, Space telescopes, Telescopes, Space operations

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Proceedings Article | 30 December 1999 Paper

Paper

Beagle 2: the exobiology lander on ESA's 2003 Mars Express mission

Mark Sims, C. Pillinger, I. Wright, G. Morgan, George Fraser, D. Pullan, S. Whitehead, J. Dowson, Richard Cole, Alan Wells, L. Richter, H. Kochan, Hans Hamacher, Alan Johnstone, A. Coates, S. Peskett, A. Brack, J. Clemmet, R. Slade, N. Phillips, C. Berry, A. Senior, J. Lingard, J. Underwood, John Zarnecki, Mark Towner, M. Leese, A. Gambier-Parry, Nicolas Thomas, Jean-Luc Josset, G. Klingelhoefer

Proceedings Volume 3755, (1999) https://doi.org/10.1117/12.375066

KEYWORDS: Mars, Spectroscopy, Cameras, Sensors, X-rays, Imaging systems, Chemical analysis, Combustion, Statistical analysis, Carbon

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Proceedings Article | 17 December 1998 Paper

Paper

Precision determination of pion mass using x-ray CCD spectroscopy

D. Anagnostopoulos, M. Augsburger, Gunther Borchert, D. Chatellard, Michael Daum, J.-P. Egger, Detlev Gotta, P. Hauser, P. Indelicato, E. Jeannet, K. Kirch, Nick Nelms, O. Schult, T. Siems, Leopold Simons, Alan Wells

Proceedings Volume 3443, (1998) https://doi.org/10.1117/12.333618

KEYWORDS: Spectroscopy, X-rays, Crystals, Charge-coupled devices, Nitrogen, Oxygen, Muons, Chemical species, Muon neutrinos, Electrons

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Proceedings Article | 6 July 1998 Paper

Paper

Beagle 2: a proposed exobiology lander for ESA's 2003 Mars Express mission

Mark Sims, C. Pillinger, I. Wright, Richard Cole, S. Whitehead, Alan Wells, K. Wittmann, L. Richter, H. Kochan, Hans Hamacher, Alan Johnstone, K. Rees, R. Turner, S. Peskett, A. Brack, J. Hobbs, L. Berthoud, R. Durrant, J. Higgins, J. Windsor, Horst Keller, H. Rosenbauer, Nicolas Thomas, J. Lingard, J. Underwood, Gerhard Neukum

Proceedings Volume 3441, (1998) https://doi.org/10.1117/12.319840

KEYWORDS: Mars, Cameras, Spectrometers, Imaging systems, Statistical analysis, Chemical analysis, Carbon, Combustion, Sensors, Gases

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Proceedings Article | 15 October 1997 Paper

Paper

X-ray and optical performance of the flight filters for the JET-X telescope

Christian Castelli, D. Watson, Alan Wells, Barry Kent, Marco Barbera, Alfonso Collura, Marcos Bavdaz

Proceedings Volume 3114, (1997) https://doi.org/10.1117/12.283781

KEYWORDS: Aluminum, Optical filters, X-rays, Ultraviolet radiation, X-ray optics, Optical testing, X-ray telescopes, Transmittance, Opacity, Oxidation

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The optical filters on board the JET-X telescope comprise thin foils of aluminum coated Lexan. During ground calibration of the filters, narrow spectral regions of high UV leakage, with peak levels of up to a few percent, were observed in broad band optical measurements in the 1000 to 10,000 angstrom range. Furthermore, transmission values were typically up to two orders of magnitude higher than calculated for the aluminum thickness. Investigation showed that these effects were attributed to a combination of aluminum oxidation, which reduces the opacity, and the use of a double sided aluminum layer in the filter design which behaves as a Fabry-Perot interference filter. These effects were verified by a multi- layer model of the filter UV response. Recent redesign of the filters for the flight program eliminated the UV leakage by adopting a single aluminum layer configuration, thus eliminating interference effects, and increasing the thickness by 30% to compensate for oxidation levels. The integrated x- ray transmission below 1 keV was found to be only reduced by 3%. In parallel with the production of the new Lexan flight filters, a set of qualification model filters was produced by the Luxel Corporation in the USA. These filters use polyimide as a substrate material which has the advantage that it is optically opaque to wavelengths below 3000 angstroms, unlike Lexan which is transparent. These new filters were found to have superior mechanical strength, being able to survive extended qualification vibration without any visible degradation in performance, and had a higher cosmetic quality and attenuation levels. As a result, these filters have now been included in the JET-X flight program. We report on the optical tests results from both Lexan and polyimide filters along with high resolution x-ray transmission results carried out at the BESSY synchrotron facility in Germany. Results of the mapping of the filter edge structures, global transmission values and uniformity are presented.

Proceedings Article | 15 October 1997 Paper

Paper

X-ray imaging performance of the flight model JET-X telescope

Alan Wells, C.M. Castelli, Mark Denby, D. Pullan, Mark Sims, Christopher Whitford, Richard Willingale, Christopher Eyles, M. Cooke, W. Curtis, Heinrich Brauninger, W. Burket, Oberto Citterio, Sergio Campana, Giancarlo Cusumano

Proceedings Volume 3114, (1997) https://doi.org/10.1117/12.283782

KEYWORDS: Calibration, Charge-coupled devices, Mirrors, X-ray telescopes, X-rays, Space telescopes, Sensors, Space operations, Spatial resolution, Point spread functions

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Proceedings Article | 31 October 1996 Paper

Paper

Use of x-ray CCDs in the calibration of the flight mirrors for the JET-X telescope on Spectrum-X

Christian Castelli, Heinrich Braeuninger, Wolfgang Burkert, Sergio Campana, Giancarlo Cusumano, Mark Denby, Roland Egger, Nick Nelms, Mark Sims, D. Watson, Alan Wells, D. Willingale

Proceedings Volume 2808, (1996) https://doi.org/10.1117/12.256040

KEYWORDS: Mirrors, Charge-coupled devices, X-rays, Sensors, Calibration, CCD cameras, X-ray telescopes, CCD image sensors, Space telescopes, Spatial resolution

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Proceedings Article | 31 October 1996 Paper

Paper

High-efficiency detector array concept for x-ray astronomy based on CCDs

Christian Castelli, Mark Sims, Alan Wells

Proceedings Volume 2808, (1996) https://doi.org/10.1117/12.256039

KEYWORDS: Charge-coupled devices, X-rays, Silicon, Sensors, X-ray astronomy, X-ray detectors, CCD image sensors, X-ray imaging, Quantum efficiency, Detector arrays

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Proceedings Article | 11 November 1994 Paper

Paper

Characterization of the CCDs for the Joint European X-Ray Telescope

Alan Owens, Kieran McCarthy, Alan Wells

Proceedings Volume 2279, (1994) https://doi.org/10.1117/12.193170

KEYWORDS: Charge-coupled devices, Calibration, X-rays, Silicon, Sensors, X-ray telescopes, Quantum efficiency, Crystals, Photons, Electrodes

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Proceedings Article | 11 November 1994 Paper

Paper

X-ray imaging and spectroscopic performance of the JET-X telescope on the Spectrum X-Gamma

Alan Wells, Alan Owens, Mark Sims

Proceedings Volume 2279, (1994) https://doi.org/10.1117/12.193166

KEYWORDS: Charge-coupled devices, X-rays, Mirrors, Silicon, X-ray telescopes, Sensors, Space operations, Electrodes, Spectral resolution, Absorption

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Proceedings Article | 11 November 1994 Paper

Paper

Measuring reflected x-ray absorption fine structure in gold-coated x-ray mirrors

Alan Owens, Sue Bayliss, S. Gurman, George Fraser, D. Hutt, Kieran McCarthy, Alan Wells

Proceedings Volume 2279, (1994) https://doi.org/10.1117/12.193151

KEYWORDS: X-rays, Mirrors, Absorption, Gold, Reflectivity, X-ray telescopes, Calibration, X-ray astronomy, Sensors, Synchrotron radiation

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Proceedings Article | 1 February 1994 Paper

Paper

Designing thin-film optical filters for soft x-ray astronomical telescopes

Alan Owens, Kieran McCarthy, Alan Wells, Barry Kent

Proceedings Volume 2011, (1994) https://doi.org/10.1117/12.167215

KEYWORDS: X-rays, Optical filters, X-ray optics, Aluminum, Stars, X-ray telescopes, Charge-coupled devices, Photons, Transmittance, Electrons

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Proceedings Article | 8 October 1992 Paper

Paper

Measurements and simulations of x-ray quantum efficiency and energy resolution of large-area CCDs between 0.3 and 10 keV

Kieran McCarthy, Alan Wells

Proceedings Volume 1743, (1992) https://doi.org/10.1117/12.130683

KEYWORDS: X-rays, Charge-coupled devices, Quantum efficiency, X-ray astronomy, Electrons, Electrodes, Silicon, Astronomy, Extreme ultraviolet, Gamma radiation

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Proceedings Article | 1 January 1992 Paper

Paper

JET-X instrument for the USSR Spectrum-RG mission: its design and performance

Alan Wells, G. Stewart, Martin Turner, D. Watson, C. Whitford, Elio Antonello, Oberto Citterio, Heinrich Braeuninger, Mark Cropper, W. Curtis, S. Peskett, Christopher Eyles, C. Goodall, T. Mineo, Bruno Sacco, Oleg Terekhov

Proceedings Volume 1546, (1992) https://doi.org/10.1117/12.51259

KEYWORDS: Charge-coupled devices, X-ray telescopes, X-ray optics, X-rays, Mirrors, Space telescopes, Sensors, Space operations, Spatial resolution, X-ray imaging

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Proceedings Article | 1 October 1991 Paper

Paper

CCD focal-plane imaging detector for the JET-X instrument on spectrum R-G

Alan Wells, Christian Castelli, Andrew Holland, Kieran McCarthy, J. Spragg, C. Whitford

Proceedings Volume 1549, (1991) https://doi.org/10.1117/12.48353

KEYWORDS: Charge-coupled devices, X-rays, X-ray astronomy, Electrodes, Gamma radiation, X-ray telescopes, Sensors, Extreme ultraviolet, Astronomy, Signal processing

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Proceedings Article | 1 November 1990 Paper

Paper

European Photon Imaging Camera for x-ray astronomy

Giovanni Bignami, Gabriele Villa, Giuliano Boella, Giuseppe Bonelli, Patricia Caraveo, Lucio Chiappetti, E. Quadrini, Guido Di Cocco, Massimo Trifoglio, Pietro Ubertini, Giovanni Peres, Salvatore Sciortino, Salvatore Serio, G. Vaiana, R. Rothenflug, Laurent Vigroux, L. Koch, Yvon Rio, Claude Pigot, Jacky Cretolle, Alan Gabriel, B. Foing, Jean-Luc Atteia, Jean-Pierre Roques, Heinrich Braeuninger, W. Pietsch, Peter Predehl, Claus Reppin, Lothar Strueder, Joachim Truemper, Gerhard Lutz, Eckhard Kendziorra, Ruediger Staubert, Andrew Holland, Richard Cole, Alan Wells, K. Pounds, David Lumb, John Pye, Martin Turner, C. Goodall, T. Ponman, Gerald Skinner, A. Willmore

Proceedings Volume 1344, (1990) https://doi.org/10.1117/12.23247

KEYWORDS: Charge-coupled devices, X-ray astronomy, Telescopes, X-rays, Cameras, Space telescopes, Imaging spectroscopy, Spatial resolution, Spectral resolution, Astronomy

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Proceedings Article | 1 November 1990 Paper

Paper

First in-orbit measurements with the ROSAT XUV wide field camera

Alan Wells, Anthony Abbey, Martin Barstow, Richard Cole, John Pye, Mark Sims, J. Spragg, D. Watson, Richard Willingale, G. Courtier, James Gourlay, Barry Kent, Anthony Richards, J. Wright, C. Goodall, E. Breeveld, Howard Huckle, A. McCalden, Timothy Sumner

Proceedings Volume 1344, (1990) https://doi.org/10.1117/12.23291

KEYWORDS: Sensors, Space operations, Extreme ultraviolet, X-ray astronomy, Stars, Ultraviolet radiation, Space telescopes, Calibration, X-rays, Optical filters

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SPIE Journal Paper | 1 June 1990

XUV wide field camera for ROSAT

Mark Sims, Martin Barstow, John Pye, Alan Wells, Richard Willingale, G. Courtier, Barry Kent, D. Reading, Anthony Richards, Richard Cole, C. Goodall, Timothy Sumner, G. Rochester

OE, Vol. 29, Issue 06, (June 1990) https://doi.org/10.1117/12.10.1117/12.55637

KEYWORDS: Extreme ultraviolet, Cameras, X-ray telescopes, Satellite imaging, Satellites, X-ray imaging, X-rays, Grazing incidence, Telescopes, Aluminum

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Showing 5 of 37 publications

Conference Committee Involvement (1)

Instruments, Methods, and Missions for Astrobiology V

22 August 2002 | Waikoloa, Hawai'i, United States

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