Prof. Ralph Kraft Profile

Prof. Ralph Kraft

President at R Kraft Inc

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 11 March 2003 Paper

Paper

Characteristics of the on-orbit background of the Chandra X-ray observatory high-resolution camera

Michael Juda, R. Donnelly, K. Hole, Almus Kenter, Ralph Kraft, Stephen Murray, Deron Pease, Charles Wilton, Martin Zombeck

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461416

KEYWORDS: Sensors, Microchannel plates, X-rays, Particles, Image segmentation, X-ray detectors, Scintillators, Image filtering, X-ray sources, Observatories

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Proceedings Article | 13 December 2000 Paper

Paper

Event screening for the Chandra X-Ray Observatory High-Resolution Camera (HRC)

Stephen Murray, John Chappell, Almus Kenter, Michael Juda, Ralph Kraft, Martin Zombeck, Gary Meehan, Gerald Austin, Joaquim Gomes

Proceedings Volume 4140, (2000) https://doi.org/10.1117/12.409108

KEYWORDS: Amplifiers, X-rays, Microchannel plates, Sensors, Observatories, Calibration, X-ray detectors, Cameras, Signal processing, Electronics

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Proceedings Article | 13 December 2000 Paper

Paper

Improving Chandra High-Resolution Camera event positions via corrections to crossed-grid charge detector signals

Michael Juda, Gerald Austin, John Chappell, Joaquim Gomes, Almus Kenter, Ralph Kraft, Stephen Murray, Martin Zombeck

Proceedings Volume 4140, (2000) https://doi.org/10.1117/12.409109

KEYWORDS: Amplifiers, Signal detection, X-rays, Distortion, Sensors, Algorithm development, Microchannel plates, Image resolution, Cameras, X-ray imaging

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Proceedings Article | 18 July 2000 Paper

Paper

In-flight performance and calibration of the Chandra high-resolution camera imager (HRC-I)

Almus Kenter, John Chappell, Ralph Kraft, Gary Meehan, Stephen Murray, Martin Zombeck, K. Hole, Michael Juda, R. Donnelly, Daniel Patnaude, Deron Pease, Charles Wilton, Ping Zhao, Gerald Austin, George Fraser, James Pearson, John Lees, Adam Brunton, Marco Barbera, Alfonso Collura, Salvatore Serio

Proceedings Volume 4012, (2000) https://doi.org/10.1117/12.391585

KEYWORDS: Sensors, Quantum efficiency, Microchannel plates, X-rays, Calibration, Synchrotrons, Ultraviolet radiation, Point spread functions, Image resolution, Photons

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Proceedings Article | 18 July 2000 Paper

Paper

In-flight performance of the Chandra high-resolution camera

Stephen Murray, Gerald Austin, John Chappell, Joaquim Gomes, Almus Kenter, Ralph Kraft, Gary Meehan, Martin Zombeck, George Fraser, Salvatore Serio

Proceedings Volume 4012, (2000) https://doi.org/10.1117/12.391591

KEYWORDS: Sensors, X-rays, Galactic astronomy, Microchannel plates, Observatories, Cameras, Imaging spectroscopy, Calibration, Spectroscopy, X-ray sources

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Proceedings Article | 18 July 2000 Paper

Paper

Description and performance of the low-energy transmission grating spectrometer on board Chandra

A. Brinkman, Theo Gunsing, Jelle Kaastra, Rob van der Meer, Rolf Mewe, Frits Paerels, Ton Raassen, Jan van Rooijen, Heinrich Braeuninger, Vadim Burwitz, Gisela Hartner, Guenther Kettenring, Peter Predehl, Jeremy Drake, C. Olivia Johnson, Almus Kenter, Ralph Kraft, Stephen Murray, Peter Ratzlaff, Bradford Wargelin

Proceedings Volume 4012, (2000) https://doi.org/10.1117/12.391599

KEYWORDS: Sensors, Calibration, Spectroscopy, Space telescopes, X-rays, Diffraction gratings, Telescopes, Solids, Space operations, X-ray telescopes

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Proceedings Article | 18 July 2000 Paper

Paper

Low-energy effective area of the Chandra low-energy transmission grating spectrometer

Deron Pease, Jeremy Drake, C. Olivia Johnson, Vinay Kashyap, Ralph Kraft, Peter Ratzlaff, Bradford Wargelin, A. Brinkman, Jelle Kaastra, Rob van der Meer, Frits Paerels, Vadim Burwitz, Peter Predehl, Herman Marshall, Martin Barstow, D. Finley, Jean Dupuis

Proceedings Volume 4012, (2000) https://doi.org/10.1117/12.391609

KEYWORDS: Calibration, X-rays, Quantum efficiency, Data modeling, Spectroscopy, Hydrogen, Atmospheric modeling, Error analysis, Observatories, Spectroscopes

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Proceedings Article | 18 July 2000 Paper

Paper

In-flight performance and calibration of the Chandra high-resolution camera spectroscopic readout (HRC-S)

Ralph Kraft, John Chappell, Almus Kenter, Gary Meehan, Stephen Murray, Martin Zombeck, R. Donnelly, Jeremy Drake, C. Olivia Johnson, Michael Juda, Daniel Patnaude, Deron Pease, Peter Ratzlaff, Bradford Wargelin, Ping Zhao, Gerald Austin, George Fraser, James Pearson, John Lees, Adam Brunton, Marco Barbera, Alfonso Collura, Salvatore Serio

Proceedings Volume 4012, (2000) https://doi.org/10.1117/12.391586

KEYWORDS: Quantum efficiency, Calibration, Sensors, Microchannel plates, X-rays, Data modeling, Synchrotrons, Image segmentation, Error analysis, Aluminum

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Proceedings Article | 22 October 1999 Paper

Paper

Design and testing of a low-cost x-ray CCD camera for the HRC program and beyond

Ralph Kraft, Almus Kenter, Stephen Murray, Joaquim Gomes, Everett Johnston

Proceedings Volume 3765, (1999) https://doi.org/10.1117/12.366513

KEYWORDS: Charge-coupled devices, Cameras, CCD cameras, Clocks, X-rays, Data acquisition, Signal processing, Calibration, Electronics, Electrons

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Proceedings Article | 19 November 1998 Paper

Paper

Effective area of the AXAF high-resolution camera (HRC)

Daniel Patnaude, Deron Pease, R. Donnelly, Michael Juda, Christine Jones, Stephen Murray, Martin Zombeck, Ralph Kraft, Almus Kenter, Gary Meehan, Ronald Elsner, Douglas Swartz

Proceedings Volume 3444, (1998) https://doi.org/10.1117/12.331294

KEYWORDS: Quantum efficiency, Sensors, Microchannel plates, Data modeling, X-rays, Calibration, Contamination, Mirrors, Cameras, Absorption

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Proceedings Article | 10 November 1998 Paper

Paper

Synchrotron measurements of the absolute x-ray quantum efficiency of CsI-coated microchannel plates

Rob Rideout, James Pearson, George Fraser, John Lees, Adam Brunton, Nigel Bannister, Almus Kenter, Ralph Kraft

Proceedings Volume 3445, (1998) https://doi.org/10.1117/12.330297

KEYWORDS: Microchannel plates, Sensors, Quantum efficiency, X-rays, Data modeling, Contamination, Cesium, Absorption, Synchrotrons, Cameras

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Proceedings Article | 28 August 1998 Paper

Paper

AXAF high-resolution camera (HRC): the challenge of calibration

Stephen Murray, John Chappell, Almus Kenter, Ralph Kraft, Gary Meehan, Martin Zombeck

Proceedings Volume 3356, (1998) https://doi.org/10.1117/12.324500

KEYWORDS: Calibration, Microchannel plates, Sensors, Electronics, X-rays, Power supplies, X-ray telescopes, Cameras, Spectroscopy, Quantum efficiency

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Proceedings Article | 15 October 1997 Paper

Paper

Performance and calibration of the AXAF High-Resolution Camera I: imaging readout

Almus Kenter, John Chappell, K. Kobayashi, Ralph Kraft, G. Meehan, Stephen Murray, Martin Zombeck, George Fraser, James Pearson, John Lees, Adam Brunton, Sarah Pearce, Marco Barbera, Alfonso Collura, Salvatore Serio

Proceedings Volume 3114, (1997) https://doi.org/10.1117/12.283777

KEYWORDS: Sensors, Microchannel plates, X-rays, Calibration, Quantum efficiency, Point spread functions, Image resolution, Cameras, Photons, Ultraviolet radiation

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Proceedings Article | 15 October 1997 Paper

Paper

Calibration of the UV/ion shields for the AXAF High-Resolution Camera

G. Meehan, Stephen Murray, Martin Zombeck, Ralph Kraft, K. Kobayashi, John Chappell, Almus Kenter, Marco Barbera, Alfonso Collura, Salvatore Serio

Proceedings Volume 3114, (1997) https://doi.org/10.1117/12.283790

KEYWORDS: X-rays, Sensors, Absorption, Ultraviolet radiation, Aluminum, Synchrotrons, Statistical modeling, Data modeling, Calibration, Mass attenuation coefficient

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Proceedings Article | 15 October 1997 Paper

Paper

AXAF High-Resolution Camera (HRC): calibration and recalibration at XRCF and beyond

Stephen Murray, John Chappell, Almus Kenter, K. Kobayashi, Ralph Kraft, G. Meehan, Martin Zombeck, George Fraser, James Pearson, John Lees, Adam Brunton, Sarah Pearce, Marco Barbera, Alfonso Collura, Salvatore Serio

Proceedings Volume 3114, (1997) https://doi.org/10.1117/12.283772

KEYWORDS: Calibration, Sensors, Microchannel plates, X-rays, X-ray detectors, Electronics, Cameras, Space operations, Spectroscopy, Quantum efficiency

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Proceedings Article | 15 October 1997 Paper

Paper

Performance and calibration of the AXAF High-Resolution Camera II: the spectroscopic detector

Ralph Kraft, John Chappell, Almus Kenter, K. Kobayashi, G. Meehan, Stephen Murray, Martin Zombeck, George Fraser, James Pearson, John Lees, Adam Brunton, Marco Barbera, Alfonso Collura, Salvatore Serio

Proceedings Volume 3114, (1997) https://doi.org/10.1117/12.283785

KEYWORDS: Sensors, Calibration, Quantum efficiency, Microchannel plates, X-rays, Aluminum, Point spread functions, Image segmentation, Cameras, X-ray detectors

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Proceedings Article | 31 October 1996 Paper

Paper

High-Resolution Camera on AXAF

Almus Kenter, John Chappell, Ralph Kraft, G. Meehan, Stephen Murray, Martin Zombeck, George Fraser

Proceedings Volume 2808, (1996) https://doi.org/10.1117/12.256037

KEYWORDS: Sensors, Microchannel plates, X-rays, Gold, Cameras, Image resolution, Spectroscopy, Electronics, Ultraviolet radiation, Coating

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Proceedings Article | 31 October 1996 Paper

Paper

Absolute quantum efficiency calibration of the AXAF High-Resolution Camera

Ralph Kraft, John Chappell, Almus Kenter, K. Kobayashi, G. Meehan, Stephen Murray, Martin Zombeck, George Fraser, James Pearson, John Lees, Adam Brunton, Sarah Pearce

Proceedings Volume 2808, (1996) https://doi.org/10.1117/12.255994

KEYWORDS: Quantum efficiency, Microchannel plates, Calibration, Sensors, X-rays, Cesium, Aluminum, Cameras, X-ray detectors, Nickel

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Proceedings Article | 31 October 1996 Paper

Paper

CCD sounding rocket observations of the soft x-ray background

Jeffrey Mendenhall, David Burrows, Laura Cawley, Eric Cocklin, Gordon Garmire, Ralph Kraft, Kaori Nishikida

Proceedings Volume 2808, (1996) https://doi.org/10.1117/12.256016

KEYWORDS: Charge-coupled devices, X-rays, Sensors, Calibration, Quantum efficiency, Rockets, Optical filters, Cameras, Aluminum, Stars

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Proceedings Article | 31 October 1996 Paper

Paper

Measurement of the transmission of the UV/ion shields for the AXAF High-Resolution Camera

G. Meehan, Almus Kenter, Ralph Kraft, Stephen Murray, Martin Zombeck, K. Kobayashi, John Chappell, Marco Barbera, Alfonso Collura

Proceedings Volume 2808, (1996) https://doi.org/10.1117/12.255995

KEYWORDS: X-rays, Aluminum, Sensors, Carbon, Image filtering, Ultraviolet radiation, Microchannel plates, Coating, X-ray detectors, Photons

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Proceedings Article | 16 September 1994 Paper

Paper

Soft x-ray spectroscopy using charge-coupled devices with thin poly gates and floating gate output amplifiers

Ralph Kraft, David Burrows, Gordon Garmire, David Lumb, John Nousek, Mark Skinner, James Janesick, Tom Elliott, S. Andy Collins, Paul Vu

Proceedings Volume 2280, (1994) https://doi.org/10.1117/12.186832

KEYWORDS: Charge-coupled devices, X-rays, Quantum efficiency, Amplifiers, Sensors, Silicon, Aluminum, X-ray detectors, Spectroscopes, Optical amplifiers

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Proceedings Article | 19 November 1993 Paper

Paper

CUBIC: laboratory testing of 'thin poly' CCDs

Mark Skinner, David Burrows, Gordon Garmire, Ralph Kraft, David Lumb, John Nousek

Proceedings Volume 2006, (1993) https://doi.org/10.1117/12.162838

KEYWORDS: Charge-coupled devices, Quantum efficiency, X-rays, Amplifiers, Carbon, CCD cameras, Cameras, Electrons, X-ray astronomy, Diffusion

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Proceedings Article | 8 October 1992 Paper

Paper

CUBIC: a nondispersive diffuse x-ray background spectrometer

David Burrows, Mark Skinner, Alexander Antunes, Mark Catalano, Eric Cocklin, Leland Engel, Timothy Entingh, Gordon Garmire, Roland Green, Douglas Kelly, Ralph Kraft, David Lumb, Stacy Malakoff, Jeffrey Mendenhall, John Nousek

Proceedings Volume 1743, (1992) https://doi.org/10.1117/12.130668

KEYWORDS: Charge-coupled devices, X-rays, X-ray astronomy, CCD cameras, Clocks, Astronomy, Satellites, Gamma radiation, Particles, Electronics

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Showing 5 of 23 publications

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