Dr. Donald A. Walko Profile

Dr. Donald A. Walko

Physicist at Argonne National Lab

SPIE Involvement:

Author

Area of Expertise:

X-ray diffraction , Time-resolved diffraction , X-ray optics

Publications (7)

Proceedings Article | 3 October 2023 Presentation + Paper

Design and characterization of x-ray diagnostics for the cavity-based x-ray free-electron laser project

Peifan Liu, Paresh Pradhan, Antonino Miceli, Donald Walko, Deming Shu, Joseph Sullivan, Keenan Lang, Mark Rivers, Diling Zhu, Aliaksei Halavanau, Yuri Shvyd'ko

Proceedings Volume 12694, 126940D (2023) https://doi.org/10.1117/12.2677209

KEYWORDS: X-rays, Diamond, Scintillators, Crystals, X-ray characterization, Diagnostics, Free electron lasers, Laser crystals, X-ray lasers, Cameras

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Proceedings Article | 4 October 2022 Presentation + Paper

Measuring the x-ray flux from MEMS devices for timing applications

Donald Walko, Jinxing Jiang, Jian Zhou, Burak Guzelturk, Xiaoyi Zhang, David Czaplewski, Jin Wang

Proceedings Volume 12240, 1224009 (2022) https://doi.org/10.1117/12.2633137

KEYWORDS: X-rays, Microelectromechanical systems, Crystals, X-ray diffraction, Sensors, Diffraction, Synchrotrons, Silicon, Avalanche photodetectors, X-ray optics

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Proceedings Article | 9 September 2019 Presentation + Paper

Optimizing x-ray optics for modulating x-ray beams with MEMS devices

Donald Walko, Pice Chen, Daniel Lopez, Jin Wang

Proceedings Volume 11108, 111080B (2019) https://doi.org/10.1117/12.2529848

KEYWORDS: Crystals, Microelectromechanical systems, X-rays, Monochromators, X-ray optics, Micromirrors, Silicon, X-ray diffraction, Sensors, Diffraction

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Proceedings Article | 23 August 2017 Presentation + Paper

Application of MEMS-based x-ray optics as tuneable nanosecond choppers

Pice Chen, Donald Walko, Il Woong Jung, Zhilong Li, Ya Gao, Gopal Shenoy, Daniel Lopez, Jin Wang

Proceedings Volume 10386, 103860M (2017) https://doi.org/10.1117/12.2273026

KEYWORDS: X-rays, X-ray optics, Microelectromechanical systems, Micromirrors, Synchrotrons, Silicon, EUV optics, Modulators, Modulation, Picosecond phenomena

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Proceedings Article | 23 August 2017 Paper

Micromirror-based manipulation of synchrotron x-ray beams

D. Walko, Pice Chen, I. W. Jung, D. Lopez, C. Schwartz, G. Shenoy, Jin Wang

Proceedings Volume 10386, 103860Z (2017) https://doi.org/10.1117/12.2274422

KEYWORDS: Microelectromechanical systems, Synchrotrons, X-rays, Micromirrors, Diffraction, X-ray optics, Reflectivity, Geometrical optics, Optical design, Modulation

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Proceedings Article | 15 October 2012 Paper

Temporal modulation of synchrotron x-rays using torsional MEMS mirrors

Donald Walko, Il Woong Jung, Daniel Lopez, Deepkishore Mukhopadhyay, Craig Schwartz, Gopal Shenoy, Jin Wang

Proceedings Volume 8502, 85020H (2012) https://doi.org/10.1117/12.930057

KEYWORDS: X-rays, Mirrors, Modulation, Micromirrors, Microelectromechanical systems, Reflectivity, Synchrotrons, Sensors, Measurement devices, Control systems

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