Dr. Howard A. Padmore Profile

Dr. Howard A. Padmore

Experimental Systems Group Leader at Lawrence Berkeley National Lab

SPIE Involvement:

Author

Publications (53)

Proceedings Article | 8 October 2024 Presentation + Paper

Post-production correction of lamellar x-ray gratings by ion beam figuring

D. Voronov, T. Wang, S. Park, L. Huang, E. Gullikson, F. Salmassi, S. Ch. Samudrala, H. Padmore, M. Idir

Proceedings Volume 13150, 131500B (2024) https://doi.org/10.1117/12.3030116

KEYWORDS: Ion beam finishing, Diffraction gratings, Optical surfaces, Blazed gratings, Diffraction, Gold, Coating, Ion beams, X-rays

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Proceedings Article | 4 October 2023 Presentation

Development of ultra-precise low blaze angle gratings at ALS

Sooyeon Park, Dmitriy Voronov, Eric Gullikson, Fahard Salmassi, Howard Padmore

Proceedings Volume PC12694, PC1269407 (2023) https://doi.org/10.1117/12.2678573

KEYWORDS: Blazed gratings, Diffraction gratings, Optical gratings, Plasma etching, Etching, Silicon, Polymers, Plasma, X-rays, X-ray diffraction

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Proceedings Article | 4 October 2022 Presentation + Paper

Fabrication of low blaze angle gratings by replication and plasma etch

Sooyeon Park, Dmitriy Voronov, Antoine Wojdyla, Eric Gullikson, Fahard Salmassi, Howard Padmore

Proceedings Volume 12240, 1224008 (2022) https://doi.org/10.1117/12.2633512

KEYWORDS: Plasma etching, Etching, Diffraction gratings, Silicon, Plasma, Quartz, Diffraction, Photoresist processing, Atomic force microscopy, X-rays

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Proceedings Article | 21 September 2021 Presentation + Paper

Low blaze angle gratings for x-ray and EUV applications

Sooyeon Park, Dmitriy Voronov, Eric Gullikson, Fahard Salmassi, Howard Padmore

Proceedings Volume 11837, 118370I (2021) https://doi.org/10.1117/12.2596269

KEYWORDS: Etching, Diffraction gratings, Plasma etching, Silicon, Diffraction, Plasma, X-rays, Neodymium, Polymers, Free electron lasers

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Proceedings Article | 25 August 2020 Presentation

Preliminary design of a set of four beamlines for the DLSR upgrade of the advanced light source

Antoine Wojdyla, Henry Alvarez, Maxime Bergeret, Albert Sheng, Diane Bryant, Arnaud Allezy, Grand Cutler, Valeriy Yashchuk, Alastair MacDowell, Kenneth Goldberg, Manuel Sanchez del Rio, Simon Morton, Elaine DiMasi, Howard Padmore

Proceedings Volume 11493, 1149304 (2020) https://doi.org/10.1117/12.2569298

KEYWORDS: Light sources, Tolerancing, X-ray diffraction, X-rays, Photon transport, Monochromators, Optical simulations, Ray tracing, Wavefronts, Wave propagation

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Proceedings Article | 21 August 2020 Presentation + Paper

Optimization of saw-tooth surface planarization for ultra-low blaze angle gratings for ALS-U

Sooyeon Park, Dmitriy Voronov, Howard Padmore

Proceedings Volume 11491, 1149108 (2020) https://doi.org/10.1117/12.2568712

KEYWORDS: Ultraviolet radiation, Plasma etching, Diffraction gratings, Etching, Liquids, Capillaries, Silicon, Solids, Plasma

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Proceedings Article | 21 August 2020 Presentation + Paper

An update on development of a cryogenically cooled-silicon mirror for the Advanced Light Source Upgrade project

Grant Cutler, Diane Bryant, Daniele Cocco, Elaine DiMasi, Kyle Mccombs, Simon Morton, Manuel Sanchez del Rio, Nathan Smith, Howard Padmore

Proceedings Volume 11491, 114910F (2020) https://doi.org/10.1117/12.2568101

KEYWORDS: Mirrors, Prototyping, Light sources, Polarization, Nitrogen, Liquids, Heat treatments, Cryogenics, X-rays, Silicon

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Proceedings Article | 9 September 2019 Presentation + Paper

Precise control of the blaze angle of x-ray diffraction gratings via planarization and plasma etching

Dmitriy Voronov, Sooyeon Park, Howard Padmore

Proceedings Volume 11108, 111080N (2019) https://doi.org/10.1117/12.2531188

KEYWORDS: Plasma etching, Etching, Plasma, Argon, Silicon, Diffraction gratings, Plasma enhanced chemical vapor deposition, Sputter deposition, X-ray diffraction

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Proceedings Article | 23 August 2017 Presentation + Paper

Full size x-ray grating fabrication using large area nanoimprint

D. Voronov, P. Lum, H. Padmore

Proceedings Volume 10386, 1038607 (2017) https://doi.org/10.1117/12.2279436

KEYWORDS: Diffraction gratings, Nanoimprint lithography, Electron beam lithography, X-ray optics

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Proceedings Article | 15 September 2016 Presentation + Paper

High efficiency diffraction grating for EUV lithography beamline monochromator

D. Voronov, T. Warwick, E. Gullikson, F. Salmassi, P. Naulleau, N. Artemiev, P. Lum, H. Padmore

Proceedings Volume 9963, 996306 (2016) https://doi.org/10.1117/12.2238303

KEYWORDS: Diffraction gratings, Diffraction, X-rays, X-ray diffraction, Etching, Extreme ultraviolet lithography, Monochromators, Plasma etching, Wet etching, Direct write lithography

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SPIE Journal Paper | 12 October 2015 Open Access

Advanced environmental control as a key component in the development of ultrahigh accuracy ex situ metrology for x-ray optics

Valeriy Yashchuk, Nikolay Artemiev, Ian Lacey, Wayne McKinney, Howard Padmore

OE, Vol. 54, Issue 10, 104104, (October 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.10.104104

KEYWORDS: Metrology, X-ray optics, Control systems, Mirrors, Humidity, X-rays, Temperature metrology, Interferometry, Calibration, Particles

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Proceedings Article | 12 May 2015 Paper

Tests of photocathodes for high repetition rate x-ray FELs at the APEX facility at LBNL

Fernando Sannibale, Daniele Filippetto, Houjun Qian, Christos Papadopoulos, Russell Wells, Toby Kramasz, Howard Padmore, Jun Feng, James Nasiatka, Ruixuan Huang, Max Zolotorev, John Staples

Proceedings Volume 9512, 95121N (2015) https://doi.org/10.1117/12.2181912

KEYWORDS: Quantum efficiency, Free electron lasers, X-rays, Electron beams, Nose, Ions, X-ray technology, Light sources, Semiconductor materials, Space operations

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Proceedings Article | 17 September 2014 Paper

A new x-ray optics laboratory (XROL) at the ALS: mission, arrangement, metrology capabilities, performance, and future plans

Valeriy Yashchuk, Nikolay Artemiev, Ian Lacey, Wayne McKinney, Howard Padmore

Proceedings Volume 9206, 92060I (2014) https://doi.org/10.1117/12.2062042

KEYWORDS: Metrology, X-ray optics, Calibration, Mirrors, Humidity, Temperature metrology, Optical testing, Interferometry, Control systems, Particles

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Proceedings Article | 5 September 2014 Paper

Variable line spacing diffraction grating fabricated by direct write lithography for synchrotron beamline applications

D. Voronov, T. Warwick, E. Gullikson, F. Salmassi, P. Naulleau, N. Artemiev, P. Lum, H. Padmore

Proceedings Volume 9207, 920706 (2014) https://doi.org/10.1117/12.2062340

KEYWORDS: Diffraction gratings, Wavefronts, Diffraction, Silicon, Plasma etching, Direct write lithography, Monochromators, Fabrication, Coating, X-ray diffraction

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Proceedings Article | 7 March 2014 Paper

Study of bi-alkali photocathode growth on glass by X-ray techniques for fast timing response photomultipliers

Junqi Xie, Marcel Demarteau, Robert Wagner, Miguel Ruiz-Oses, Xue Liang, Ilan Ben-Zvi, Klaus Attenkofer, Susanne Schubert, John Smedley, Jared Wong, Howard Padmore, Arthur Woll

Proceedings Volume 8982, 89821O (2014) https://doi.org/10.1117/12.2037367

KEYWORDS: Antimony, X-rays, Crystals, Glasses, X-ray diffraction, Diffusion, Cesium, Photomultipliers, Grazing incidence, Reflectivity

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Proceedings Article | 27 September 2013 Paper

Fabrication of x-ray gratings by direct write maskless lithography

D. Voronov, S. Diez, P. Lum, S. Hidalgo, T. Warwick, N. Artemiev, H. Padmore

Proceedings Volume 8848, 88480Q (2013) https://doi.org/10.1117/12.2024489

KEYWORDS: Diffraction gratings, Wavefronts, X-rays, Plasma etching, Diffraction, Etching, Fabrication, Holography, Plasma, Silicon

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Proceedings Article | 25 September 2013 Paper

Real time evolution of antimony deposition for high performance alkali photocathode development

Junqi Xie, Marcel Demarteau, Robert Wagner, Edward May, Jiang Zhang, Miguel Ruiz-Oses, Xue Liang, Ilan Ben-Zvi, Klaus Attenkofer, Susan Schubert, John Smedley, Jared Wong, Howard Padmore

Proceedings Volume 8847, 884705 (2013) https://doi.org/10.1117/12.2024424

KEYWORDS: Antimony, X-rays, Scattering, Silicon, Glasses, X-ray diffraction, Molybdenum, Sensors, Thin films, Crystals

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SPIE Journal Paper | 14 March 2013 Open Access

Methodology for optimal in situ alignment and setting of bendable optics for nearly diffraction-limited focusing of soft x-rays

Daniel Merthe, Valeriy Yashchuk, Kenneth Goldberg, Martin Kunz, Nobumichi Tamura, Wayne McKinney, Nikolay Artemiev, Richard Celestre, Gregory Morrison, Erik Anderson, Brian Smith, Edward Domning, Senajith Rekawa, Howard Padmore

OE, Vol. 52, Issue 03, 033603, (March 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.3.033603

KEYWORDS: Mirrors, Wavefronts, X-rays, Optical alignment, In situ metrology, X-ray optics, Optical testing, Charge-coupled devices, X-ray diffraction, Shearing interferometers

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Proceedings Article | 15 October 2012 Paper

Methodology for optimal in situ alignment and setting of bendable optics for diffraction-limited focusing of soft x-rays

Proceedings Volume 8501, 850108 (2012) https://doi.org/10.1117/12.930023

KEYWORDS: Mirrors, Wavefronts, X-rays, In situ metrology, Optical alignment, X-ray optics, Optical testing, Shearing interferometers, Metrology, Charge-coupled devices

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Proceedings Article | 22 February 2012 Paper

Tunable plasmonic nanostructures for light trapping and strong field enhancement at the metal surface

Aleksandr Polyakov, Kevin Thompson, Stefano Cabrini, Peter Schuck, Howard Padmore

Proceedings Volume 8269, 82691X (2012) https://doi.org/10.1117/12.909038

KEYWORDS: Reflectivity, Dielectrics, Gold, Metals, Plasmonics, Optical design, Near infrared, Coating, Finite-difference time-domain method, Nanostructures

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Proceedings Article | 28 September 2011 Paper

An experimental apparatus for diffraction-limited soft x-ray nano-focusing

Daniel Merthe, Kenneth Goldberg, Valeriy Yashchuk, Sheng Yuan, Wayne McKinney, Richard Celestre, Iacopo Mochi, James Macdougall, Gregory Morrison, Senajith Rakawa, Erik Anderson, Brian Smith, Edward Domning, Tony Warwick, Howard Padmore

Proceedings Volume 8139, 813907 (2011) https://doi.org/10.1117/12.894116

KEYWORDS: Mirrors, Wavefronts, Charge-coupled devices, Interferometry, X-rays, CCD cameras, Metrology, Light sources, Solids, X-ray optics

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Proceedings Article | 28 September 2011 Paper

Roughening and smoothing behavior of Al/Zr multilayers grown on flat and saw-tooth substrates

D. Voronov, E. Anderson, R. Cambie, E. Gullikson, F. Salmassi, T. Warwick, V. Yashchuk, H. Padmore

Proceedings Volume 8139, 81390B (2011) https://doi.org/10.1117/12.893774

KEYWORDS: Multilayers, Diffusion, Silicon, Diffraction gratings, Semiconducting wafers, Coating, X-rays, Atomic force microscopy, X-ray diffraction, Solids

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Proceedings Article | 7 September 2011 Paper

Photocathode performance improvement by plasmonic light trapping in nanostructured metal surfaces

Aleksandr Polyakov, Kevin Thompson, Christoph Senft, Scott Dhuey, Bruce Harteneck, Xiaogan Liang, James Schuck, Stefano Cabrini, Weishi Wan, Howard Padmore

Proceedings Volume 8094, 809407 (2011) https://doi.org/10.1117/12.894607

KEYWORDS: Metals, Plasmonics, Gold, Quantum efficiency, Reflectivity, Silicon, Absorption, Reactive ion etching, Solar energy, Finite-difference time-domain method

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Proceedings Article | 2 September 2010 Paper

Compressive phase contrast tomography

F. Maia, A. MacDowell, S. Marchesini, H. Padmore, D. Parkinson, J. Pien, A. Schirotzek, C. Yang

Proceedings Volume 7800, 78000F (2010) https://doi.org/10.1117/12.861946

KEYWORDS: Tomography, Phase contrast, Light sources, X-rays, Radon transform, Radon, Signal to noise ratio, Fourier transforms, Sensors, Hard x-rays

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Proceedings Article | 27 August 2010 Paper

High-efficiency multilayer blazed gratings for EUV and soft x-rays: recent developments

Dmitriy Voronov, Minseung Ahn, Eric Anderson, Rossana Cambie, Chih-Hao Chang, Leonid Goray, Eric Gullikson, Ralf Heilmann, Farhad Salmassi, Mark Schattenburg, Tony Warwick, Valeriy Yashchuk, Howard Padmore

Proceedings Volume 7802, 780207 (2010) https://doi.org/10.1117/12.861287

KEYWORDS: Diffraction gratings, Multilayers, Silicon, Diffraction, Transmission electron microscopy, Etching, Chemical species, Diffusion, Extreme ultraviolet, X-rays

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Proceedings Article | 9 September 2009 Paper

5000 groove/mm multilayer-coated blazed grating with 33% efficiency in the 3rd order in the EUV wavelength range

Dmitriy Voronov, Erik Anderson, Rossana Cambie, Farhad Salmassi, Eric Gullikson, Valeriy Yashchuk, Howard Padmore, Minseung Ahn, Chih-Hao Chang, Ralf Heilmann, Mark Schattenburg

Proceedings Volume 7448, 74480J (2009) https://doi.org/10.1117/12.826921

KEYWORDS: Diffraction gratings, Multilayers, Etching, Silicon, Diffraction, Semiconducting wafers, Scanning probe microscopy, Extreme ultraviolet, Anisotropic etching, X-rays

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Proceedings Article | 4 September 2009 Paper

Optical path function calculation for an incoming cylindrical wave

Wayne McKinney, James Glossinger, Howard Padmore, Malcolm Howells

Proceedings Volume 7448, 744809 (2009) https://doi.org/10.1117/12.828490

KEYWORDS: X-ray optics, Mirrors, Grazing incidence, Optics manufacturing, Polishing, Ray tracing, Surface finishing, Solids, Geometrical optics, Spherical lenses

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Proceedings Article | 3 September 2008 Paper

Fabrication and characterization of a new high density Sc/Si multilayer sliced grating

Dmitriy Voronov, Rossana Cambie, Eric Gullikson, Valeriy Yashchuk, Howard Padmore, Yuri Pershin, Alexander Ponomarenko, Valeriy Kondratenko

Proceedings Volume 7077, 707708 (2008) https://doi.org/10.1117/12.795377

KEYWORDS: Multilayers, Diffraction gratings, Etching, Diffraction, Prototyping, Silicon, X-rays, Semiconducting wafers, Coating, Polishing

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Proceedings Article | 20 September 2007 Paper

Development of an ultrahigh-resolution diffraction grating for soft x-rays

Dmitriy Voronov, Rossana Cambie, Ruslan Feshchenko, Eric Gullikson, Howard Padmore, Alexander Vinogradov, Valeriy Yashchuk

Proceedings Volume 6705, 67050E (2007) https://doi.org/10.1117/12.732658

KEYWORDS: Diffraction gratings, Diffraction, X-rays, Multilayers, Spectral resolution, X-ray diffraction, Scattering, Distortion, Reflectivity, Tolerancing

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Proceedings Article | 21 September 2005 Paper

An ultra-fast x-ray streak camera for the study of magnetization dynamics

J. Feng, W. Wan, J. Qiang, A. Bartelt, A. Comin, A. Scholl, J. Byrd, R. Falcone, G. Huang, A. MacPhee, J. Nasiatka, K. Opachich, D. Weinstein, T. Young, H. Padmore

Proceedings Volume 5920, 592009 (2005) https://doi.org/10.1117/12.618749

KEYWORDS: Streak cameras, X-rays, Temporal resolution, Ultrafast phenomena, Switches, Magnetism, Cameras, Imaging systems, Digital signal processing, X-ray magnetic circular dichroism

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Proceedings Article | 21 September 2005 Paper

Ultrafast magnetization dynamics studies using an x-ray streak camera

A. Bartelt, A. Comin, J. Feng, J. Nasiatka, H. Padmore, A. Scholl, A. Young

Proceedings Volume 5920, 592019 (2005) https://doi.org/10.1117/12.640528

KEYWORDS: X-rays, Magnetism, Streak cameras, Picosecond phenomena, X-ray magnetic circular dichroism, Pulsed laser operation, Ultrafast phenomena, Ultraviolet radiation, Femtosecond phenomena, Polarization

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Proceedings Article | 28 January 2004 Paper

Characterization of CsI photocathodes at grazing incidence for use in a unit quantum efficiency x-ray streak camera

Donnacha Lowney, Philip Heimann, Eric Gullikson, Andrew MacPhee, Roger Falcone, Howard Padmore

Proceedings Volume 5194, (2004) https://doi.org/10.1117/12.503412

KEYWORDS: Quantum efficiency, X-rays, Grazing incidence, Streak cameras, Data modeling, Electron transport, Absorption, X-ray characterization, Sensors, Solids

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Proceedings Article | 28 January 2004 Paper

X-ray optical designs for the linac-based ultrafast x-ray source (LUX)

Philip Heimann, Howard Padmore, Alexander Zholents

Proceedings Volume 5194, (2004) https://doi.org/10.1117/12.531363

KEYWORDS: X-rays, Crystals, Mirrors, Ultrafast phenomena, X-ray optics, X-ray sources, Crystal optics, X-ray diffraction, Monochromators, Laser crystals

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Proceedings Article | 25 January 2001 Paper

Femtosecond x-ray diffraction: experiments and limits

Justin Wark, A. Allen, P. Ansbro, Philip Bucksbaum, Zenghu Chang, Mark DeCamp, Roger Falcone, Philip Heimann, S. Johnson, Inuk Kang, Henry Kapteyn, Jorgen Larsson, Richard Lee, Aaron Lindenberg, Roberto Merlin, Thomas Missalla, G. Naylor, Howard Padmore, David Reis, K. Scheidt, Anders Sjoegren, P. Sondhauss, Michael Wulff

Proceedings Volume 4143, (2001) https://doi.org/10.1117/12.413690

KEYWORDS: Phonons, Crystals, X-rays, X-ray diffraction, Diffraction, Acoustics, Femtosecond phenomena, X-ray optics, Free electron lasers, Reflectivity

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SPIE Journal Paper | 1 October 2000

Theory and practice of elliptically bent x-ray mirrors

Malcolm Howells, Daniela Cambie, Steven Irick, Alastair MacDowell, Howard Padmore, Timothy Renner, Seung Rah, Reuben Sandler

OE, Vol. 39, Issue 10, (October 2000) https://doi.org/10.1117/12.10.1117/1.1289879

KEYWORDS: Mirrors, X-rays, Monochromatic aberrations, Error analysis, Metals, Optical engineering, Polishing, Distortion, Manufacturing, Ceramics

Proceedings Article | 13 November 1998 Paper

Design, analysis, and performance of an epoxy-bonded bendable mirror

Neal Hartman, Philip Heimann, Alastair MacDowell, Keith Franck, Andrew Grieshop, Steven Irick, Howard Padmore

Proceedings Volume 3447, (1998) https://doi.org/10.1117/12.331128

KEYWORDS: Mirrors, Adhesives, Silicon, Epoxies, Etching, Finite element methods, X-rays, Aerospace engineering, Thermal modeling, Light sources

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Proceedings Article | 6 November 1998 Paper

Bend magnet beamline for scanning transmission x-ray microscopy at the Advanced Light Source

Anthony Warwick, Howard Padmore, Harald Ade

Proceedings Volume 3449, (1998) https://doi.org/10.1117/12.330337

KEYWORDS: Zone plates, Spectral resolution, Microscopes, Monochromators, Photons, Diffraction, Diffraction gratings, X-ray microscopy, Light sources, X-rays

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Proceedings Article | 6 November 1998 Paper

Progress toward submicron hard x-ray imaging using elliptically bent mirrors and its applications

Alastair MacDowell, Chang-Hasnain Chang, G. Lamble, Richard Celestre, J. Patel, Howard Padmore

Proceedings Volume 3449, (1998) https://doi.org/10.1117/12.330341

KEYWORDS: X-rays, Mirrors, Crystals, Monochromators, Zinc, Aluminum, X-ray diffraction, Silicon, X-ray optics, Chromium

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Proceedings Article | 11 December 1997 Paper

Melting of a semiconductor crystal (InSb) with a short laser pulse (100 fs)

Vladimir Belyakov, Philip Heimann, Jorgen Larsson, S. Semenov, Aaron Lindenberg, P. Schuck, E. Judd, Philip Bucksbaum, Richard Lee, Howard Padmore, Justin Wark, Roger Falcone

Proceedings Volume 3151, (1997) https://doi.org/10.1117/12.294494

KEYWORDS: Crystals, Laser crystals, X-rays, X-ray diffraction, Pulsed laser operation, Semiconductors, Semiconductor lasers, Silicon, Picosecond phenomena, Laser irradiation

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Proceedings Article | 3 November 1997 Paper

Aberration analysis calculations for synchrotron radiation beamline design

Wayne McKinney, Malcolm Howells, Howard Padmore

Proceedings Volume 3150, (1997) https://doi.org/10.1117/12.292731

KEYWORDS: Geometrical optics, Diffraction gratings, Synchrotron radiation, Optical design, Ray tracing, Grazing incidence, Monochromatic aberrations, Wavefronts, Light, Diffraction

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Proceedings Article | 3 November 1997 Paper

X-ray multilayer gratings with very high diffraction efficiency

Vladimir Martynov, Howard Padmore, A. Yuakshin, Yu Agafonov

Proceedings Volume 3150, (1997) https://doi.org/10.1117/12.292728

KEYWORDS: Diffraction gratings, Diffraction, Multilayers, Mirrors, Photomasks, Reflectivity, X-ray diffraction, X-rays, Ions, Sensors

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Proceedings Article | 1 November 1997 Paper

Progress toward submicron hard x-ray imaging using elliptically bent mirrors

Alastair MacDowell, Richard Celestre, Chang-Hasnain Chang, Keith Franck, Malcolm Howells, Scott Locklin, Howard Padmore, J. Patel, Reuben Sandler

Proceedings Volume 3152, (1997) https://doi.org/10.1117/12.279374

KEYWORDS: Mirrors, X-rays, Crystals, X-ray diffraction, X-ray optics, X-ray imaging, Monochromators, Hard x-rays, Signal detection, Diffraction

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Proceedings Article | 1 November 1997 Paper

Construction and performance of a 1-m-long elliptically bent steel mirror

Timothy Renner, Keith Franck, Malcolm Howells, Steven Irick, Howard Padmore, Seung Rah

Proceedings Volume 3152, (1997) https://doi.org/10.1117/12.295558

KEYWORDS: Mirrors, Polishing, Manufacturing, Nickel, X-rays, Chlorine, Tolerancing, Electron microscopes, Carbon, Surface finishing

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Proceedings Article | 16 October 1997 Paper

First infrared beamline at the ALS: design, construction, and initial commissioning

Wayne McKinney, Carol Hirschmugl, Howard Padmore, Ted Lauritzen, Nord Andresen, Greg Andronaco, Rob Patton, Martin Fong

Proceedings Volume 3153, (1997) https://doi.org/10.1117/12.290260

KEYWORDS: Mirrors, Infrared radiation, Microscopy, Diamond, Optical design, Microscopes, Surface properties, FT-IR spectroscopy, Interferometers, Infrared spectroscopy

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Proceedings Article | 22 November 1996 Paper

Preliminary optical design of a varied line-space spectrograph for the multichannel detection of Near-Edge X-ray Absorption Fine Structure (NEXAFS) spectra in the 280- to 550-eV energy range

Benjamin Wheeler, Wayne McKinney, Zahid Hussain, Howard Padmore

Proceedings Volume 2856, (1996) https://doi.org/10.1117/12.259865

KEYWORDS: Mirrors, Spectral resolution, Optical design, Spectrographs, Absorption, Systems modeling, X-rays, Carbon, Synchrotrons, Adaptive optics

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Proceedings Article | 22 November 1996 Paper

New schemes for producing high-accuracy elliptical x-ray mirrors by elastic bending

Howard Padmore, Malcolm Howells, Steven Irick, Timothy Renner, Reuben Sandler, Y.-M. Koo

Proceedings Volume 2856, (1996) https://doi.org/10.1117/12.259867

KEYWORDS: Mirrors, X-rays, Chlorine, X-ray diffraction, Glasses, Surface finishing, Monochromatic aberrations, Beam shaping, Grazing incidence, Polishing

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Proceedings Article | 22 November 1996 Paper

Elliptically polarizing undulator beamline 4.0.1 for magnetic spectroscopy at the Advanced Light Source

Vladimir Martynov, Anthony Young, Howard Padmore

Proceedings Volume 2856, (1996) https://doi.org/10.1117/12.259860

KEYWORDS: Mirrors, Diffraction gratings, Monochromators, Polarization, Spectral resolution, X-rays, Magnetism, Spectroscopy, Switching, Diffraction

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Proceedings Article | 19 July 1996 Paper

Two-dimensional pixel array image sensor for protein crystallography

Eric Beuville, J.-F. Beche, Chris Cork, V. Douence, Thomas Earnest, Jacques Millaud, David Nygren, Howard Padmore, Bojan Turko, G. Zizka, Philip Datte, N.-H. Xuong

Proceedings Volume 2859, (1996) https://doi.org/10.1117/12.245126

KEYWORDS: Sensors, Crystallography, Prototyping, Proteins, Analog electronics, Logic, Image sensors, Diodes, Silicon, Imaging arrays

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Proceedings Article | 25 September 1995 Paper

Elliptical wiggler beam line with minimum focal spot size at the ALS

Vladimir Martynov, Wayne McKinney, Howard Padmore

Proceedings Volume 2516, (1995) https://doi.org/10.1117/12.221677

KEYWORDS: Monochromators, Mirrors, Diffraction gratings, Diffraction, Spherical lenses, Spectral resolution, Monochromatic aberrations, Magnetism, Synchrotron radiation, Solids

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Proceedings Article | 1 February 1994 Paper

Synthesis and measurement of normal incidence x-ray multilayer mirrors optimized for a photon energy of 390 eV

Anatoli Fedorenko, V. Kondratenko, Yurii Pershin, S. Yulin, E. Zubarev, Howard Padmore, K. Cheung, Gert van Dorssen, M. Roper, Igor Kozhevnikov, L. Balakireva, Alexander Vinogradov

Proceedings Volume 2012, (1994) https://doi.org/10.1117/12.167386

KEYWORDS: Reflectivity, Mirrors, Multilayers, Silicon, Scandium, X-rays, Sputter deposition, Sensors, Interfaces, Tungsten

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Proceedings Article | 29 November 1993 Paper

Optimization and comparison of multipole wiggler and bending magnet sources of synchrotron radiation for x-ray experiments

Gert van Dorssen, Howard Padmore, W. Joho

Proceedings Volume 2013, (1993) https://doi.org/10.1117/12.164791

KEYWORDS: Superconductors, Laser sintering, Electron beams, Photons, Diamond, Magnetism, Synchrotron radiation, X-rays, Light sources, Diffraction

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Proceedings Article | 1 October 1991 Paper

Grating efficiency theory versus experimental data in extreme situations

Michel Neviere, Antonius den Boggende, Howard Padmore, K. Hollis

Proceedings Volume 1545, (1991) https://doi.org/10.1117/12.49403

KEYWORDS: X-rays, Diffraction, Diffraction gratings, Gold, Synchrotron radiation, Electromagnetic theory, Optical design, Multilayers, X-ray diffraction, Scattering

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