Dr. Kawal Sawhney Profile

Dr. Kawal Sawhney

Optics Group Leader at Diamond Light Source Ltd

SPIE Involvement:

Author | Editor

Publications (27)

Proceedings Article | 26 August 2024 Presentation

Compact freeform 3 mirrors telescope for CubeSat within an additively manufactured housing (Conference Presentation)

Cyril Bourgenot, Joel Coukham, David Bramall, Paul White, Christopher Graham, Daniel Tomlinson, Hongchang Wang, Riley Shurvinton, Paresh Pradhan, Weichen Gu, Arindam Majhi, Kawal Sawhney, Abdul Haque

Proceedings Volume 13100, 131001J (2024) https://doi.org/10.1117/12.3020101

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Proceedings Article | 3 October 2023 Open Access

Diamond-VeNOM: a high-speed slope profiler for characterizing x-ray mirrors

Ioana-Theodora Nistea, Simon Alcock, Murilo Bazan da Silva, K. Sawhney

Proceedings Volume 12695, 126950A (2023) https://doi.org/10.1117/12.2688134

KEYWORDS: Autocollimators, Metrology, Profilometers, X-ray optics

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Proceedings Article | 3 October 2023 Open Access

X-ray topography of diffracting crystal optics at the Diamond Light Source

John Sutter, Vishal Dhamgaye, Oliver J. Fox, Kawal Sawhney

Proceedings Volume 12694, 1269409 (2023) https://doi.org/10.1117/12.2675894

KEYWORDS: Laser crystals, Liquid crystals

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Proceedings Article | 24 August 2020 Presentation

Measurements and simulations of wavefront correcting refractive x-ray optics

David Laundy, Vishal Dhamgaye, Thomas Moxham, Kawal Sawhney

Proceedings Volume 11493, 114930I (2020) https://doi.org/10.1117/12.2571161

KEYWORDS: Wavefronts, X-ray optics, X-rays, Optical components, Optical testing, Optical simulations, Mirrors, Refraction, Diamond, Light sources

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Proceedings Article | 21 August 2020 Open Access

Bragg-case x-ray dynamical diffraction propagator in SRW: application to thin crystal phase retarders

John Sutter, Oleg Chubar, Alexey Suvorov, Christie Nelson, Kawal Sawhney

Proceedings Volume 11493, 114930V (2020) https://doi.org/10.1117/12.2567341

KEYWORDS: Wave plates, Crystals, Polarization, X-rays, Diffraction, Optical simulations, X-ray diffraction, Wavefronts

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Proceedings Article | 21 August 2020 Open Access

Perturbation perspective of partial coherence discussion on imperfect x-ray optical elements

Lingfei Hu, John Sutter, Hongchang Wang, Kawal Sawhney

Proceedings Volume 11493, 114930D (2020) https://doi.org/10.1117/12.2567207

KEYWORDS: Optical components, Mirrors, X-ray optics, X-rays, Fourier transforms, Optical simulations, Coherence (optics), Distortion, Synchrotron radiation, Synchrotron radiation instrumentation, Free electron lasers

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Proceedings Article | 9 September 2019 Open Access

The Optical Metrology Laboratory at Diamond: pushing the limits of nano-metrology

Ioana-Theodora Nistea, Simon Alcock, Murilo Bazan da Silva, Kawal Sawhney

Proceedings Volume 11109, 1110906 (2019) https://doi.org/10.1117/12.2529401

KEYWORDS: Mirrors, Metrology, X-ray optics, Optical metrology, Diffraction gratings, Synchrotrons, Fizeau interferometers

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Proceedings Article | 9 September 2019 Open Access

Ion beam figuring and optical metrology system for synchrotron x-ray mirrors

Matthew Hand, Simon Alcock, Michael Hillman, Richard Littlewood, Simone Moriconi, Hongchang Wang, Kawal Sawhney

Proceedings Volume 11109, 111090A (2019) https://doi.org/10.1117/12.2528463

KEYWORDS: Ion beams, Ions, Ion beam finishing, Mirrors, Metrology, X-rays, X-ray optics, Synchrotrons, Optical metrology, Optics manufacturing

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Proceedings Article | 9 September 2019 Open Access

Controlling an active bimorph deformable mirror with sub-nanometre resolution

Ioana-Theodora Nistea, Simon Alcock, Vivek Badami, Riccardo Signorato, Kawal Sawhney

Proceedings Volume 11109, 111090E (2019) https://doi.org/10.1117/12.2529322

KEYWORDS: Mirrors, Sensors, Metrology, Deformable mirrors, Power supplies, X-ray optics, Interferometry

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Proceedings Article | 7 September 2017 Open Access

Speckle-based portable device for in-situ metrology of x-ray mirrors at Diamond Light Source

Hongchang Wang, Yogesh Kashyap, Tunhe Zhou, Kawal Sawhney

Proceedings Volume 10385, 1038504 (2017) https://doi.org/10.1117/12.2274780

KEYWORDS: X-rays, Metrology, Mirrors, Diamond, Speckle, Synchrotrons, X-ray characterization, Light sources, Synchrotron radiation, In situ metrology

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Proceedings Article | 23 August 2017 Open Access

Effect of x-ray mirror figure error on the focus profile: comparison of measurements with physical and geometric optics simulations

David Laundy, Kawal Sawhney

Proceedings Volume 10388, 103880G (2017) https://doi.org/10.1117/12.2275141

KEYWORDS: X-rays, X-ray optics, Mirrors, Optical simulations, Wavefronts, Geometrical optics, Modeling, Wave propagation, Diffraction, Optical components

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Proceedings Article | 23 August 2017 Open Access

Refractive optics to compensate x-ray mirror shape-errors

David Laundy, Kawal Sawhney, Vishal Dhamgaye, Ian Pape

Proceedings Volume 10386, 103860B (2017) https://doi.org/10.1117/12.2275134

KEYWORDS: X-ray optics, X-rays, Mirrors, Wavefronts, Synchrotrons, Diamond, Optical fabrication, Metrology, Beam shaping, Optical components

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Proceedings Article | 23 August 2017 Open Access

Speckle-based at-wavelength metrology of x-ray optics at Diamond Light Source

Hongchang Wang, Tunhe Zhou, Yogesh Kashyap, Kawal Sawhney

Proceedings Volume 10388, 103880I (2017) https://doi.org/10.1117/12.2274781

KEYWORDS: X-ray optics, Metrology, X-rays, Speckle, Synchrotron radiation, Mirrors, Diamond, In situ metrology, Synchrotrons, Optical testing

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Proceedings Article | 15 September 2016 Open Access

Aberration-free x-ray lenses made of silicon

L. Alianelli, I. Pape, J. Sutter, O. J. L. Fox, K. J. S. Sawhney, K. Korwin-Mikke

Proceedings Volume 9963, 99630S (2016) https://doi.org/10.1117/12.2240005

KEYWORDS: Lenses, X-ray optics, X-rays, Lens design, Computer generated holography, Synchrotrons, Silicon, Etching, Lithography, Diamond

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Proceedings Article | 8 September 2016 Open Access

X-ray beam expansion by the application of re-entrant surface profiles to deformable bimorph mirrors

John Sutter, Simon Alcock, Yogesh Kashyap, Ioana Nistea, Hongchang Wang, Kawal Sawhney

Proceedings Volume 9965, 99650E (2016) https://doi.org/10.1117/12.2239116

KEYWORDS: Mirrors, X-rays, Deformable mirrors, Surface finishing, Polishing, Surface finishing, Deformable mirrors, Electrodes, Diamond, Light sources, Speckle, Beam shaping

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Proceedings Article | 5 September 2014 Open Access

Partial coherence and imperfect optics at a synchrotron radiation source modeled by wavefront propagation

David Laundy, Simon Alcock, Lucia Alianelli, John Sutter, Kawal J. Sawhney, Oleg Chubar

Proceedings Volume 9209, 920903 (2014) https://doi.org/10.1117/12.2062903

KEYWORDS: Mirrors, Wavefronts, X-rays, Wave propagation, Optical components, Synchrotron radiation, Optical simulations, Electron beams, Light wave propagation, Light sources

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Proceedings Article | 5 September 2014 Open Access

At-wavelength metrology of x-ray optics at Diamond Light Source

Hongchang Wang, Sebastien Berujon, John Sutter, Simon Alcock, Kawal Sawhney

Proceedings Volume 9206, 920608 (2014) https://doi.org/10.1117/12.2062828

KEYWORDS: X-rays, Mirrors, Wavefronts, Speckle, X-ray optics, Metrology, Near field optics, Sensors, Diamond, Light sources

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Proceedings Article | 5 September 2014 Open Access

Structure in defocused beams of x-ray mirrors: causes and possible solutions

John Sutter, Simon Alcock, Fiona Rust, Hongchang Wang, Kawal Sawhney

Proceedings Volume 9208, 92080G (2014) https://doi.org/10.1117/12.2061941

KEYWORDS: Mirrors, Electrodes, X-rays, Polishing, Sensors, Diamond, Geometrical optics, Optical testing, Light sources, Surface finishing

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Proceedings Article | 28 September 2011 Paper

A double multilayer monochromator for the B16 Test beamline at the Diamond Light Source

K. J. Sawhney, I. Dolbnya, S. Scott, M. Tiwari, G. Preece, S. Alcock, A. Malandain

Proceedings Volume 8139, 813908 (2011) https://doi.org/10.1117/12.894920

KEYWORDS: Monochromators, Reflectivity, Multilayers, X-rays, Diamond, Light sources, Mirrors, X-ray optics, Crystals, Energy efficiency

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Proceedings Article | 14 September 2011 Paper

Automated in-situ optimization of bimorph mirrors at Diamond Light Source

John Sutter, Simon Alcock, Kawal J. Sawhney

Proceedings Volume 8139, 813906 (2011) https://doi.org/10.1117/12.892719

KEYWORDS: Mirrors, X-rays, Electrodes, Cameras, Diamond, Light sources, Synchrotrons, Diffraction, CCD cameras, Hard x-rays

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Proceedings Article | 2 September 2010 Paper

A novel adaptive bimorph focusing mirror and wavefront corrector with sub-nanometre dynamical figure control

Kawal J. Sawhney, Simon Alcock, Riccardo Signorato

Proceedings Volume 7803, 780303 (2010) https://doi.org/10.1117/12.861593

KEYWORDS: Mirrors, Polishing, Wavefronts, Surface finishing, X-rays, X-ray optics, Optics manufacturing, Diamond, Light sources, Metrology

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Proceedings Article | 27 August 2010 Paper

Recent upgrades to the Diamond-NOM: A slope measuring profiler capable of characterizing the surface profile of large optics with sub-nanometer repeatability

Simon Alcock, Kawal J. Sawhney, Stewart Scott

Proceedings Volume 7801, 780105 (2010) https://doi.org/10.1117/12.861623

KEYWORDS: Mirrors, Metrology, Autocollimators, Optics manufacturing, Synchrotrons, Diamond, X-rays, Optical testing, Light sources, Adaptive optics

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Proceedings Article | 17 June 2009 Paper

A Fizeau interferometer system with double-pass and stitching for characterizing the figure error of large (>1m) synchrotron optics

G. Ludbrook, S. Alcock, K. J. S. Sawhney

Proceedings Volume 7389, 738939 (2009) https://doi.org/10.1117/12.827865

KEYWORDS: Optical testing, Synchrotrons, Fizeau interferometers, Interferometers, Optics manufacturing, Reflection, X-ray optics, Optical design, Data acquisition, X-rays

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Proceedings Article | 20 September 2007 Paper

Development of refractive x-ray focusing optics at Diamond Light Source

L. Alianelli, K. Sawhney, I. Loader, D. Jenkins, R. Stevens, A. Snigirev, I. Snigireva

Proceedings Volume 6705, 670507 (2007) https://doi.org/10.1117/12.737350

KEYWORDS: Computer generated holography, X-rays, Diamond, X-ray optics, Silicon, Optical fabrication, Mirrors, Electron beam lithography, Cameras, Light sources

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Proceedings Article | 20 September 2007 Paper

Progress in the x-ray optics and metrology lab at Diamond Light Source

Simon Alcock, K. J. Sawhney

Proceedings Volume 6704, 67040E (2007) https://doi.org/10.1117/12.737843

KEYWORDS: Metrology, X-ray optics, Synchrotrons, Optics manufacturing, Fizeau interferometers, X-rays, Mirrors, Interferometers, Atomic force microscopy, Diamond

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Proceedings Article | 29 August 2006 Paper

X-ray optics for beamlines at Diamond Light Source

S. Alcock, L. Alianelli, K. Sawhney

Proceedings Volume 6317, 63170C (2006) https://doi.org/10.1117/12.684012

KEYWORDS: X-ray optics, Metrology, X-rays, Mirrors, Optics manufacturing, Lenses, Synchrotrons, Diamond, Light sources, Error analysis

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Proceedings Article | 22 November 1996 Paper

Laterally graded Si1-xGex crystals for high-resolution synchrotron x-ray optics

Alexei Erko, Franz Schaefers, Wolfgang Gudat, K. Sawhney, Nikolai Abrosimov, S. Rossolenko, V. Alex, S. Groth, W. Schroeder

Proceedings Volume 2856, (1996) https://doi.org/10.1117/12.259855

KEYWORDS: Crystals, Silicon, Germanium, Laser crystals, X-rays, Monochromators, Synchrotron radiation, Reflection, X-ray optics, Diffraction

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Showing 5 of 27 publications

Proceedings Volume Editor (4)

SPIE Conference Volume | 28 September 2020

Advances in Computational Methods for X-Ray Optics V

SPIE Conference Volume | 10 November 2017

Advances in Computational Methods for X-Ray Optics IV

SPIE Conference Volume | 15 October 2014

Advances in Computational Methods for X-Ray Optics III

SPIE Conference Volume | 8 September 2011

Advances in Computational Methods for X-Ray Optics II

Conference Committee Involvement (22)

Advances in Metrology for X-Ray and EUV Optics XI

3 August 2025 | San Diego, California, United States

Advances in Metrology for X-Ray and EUV Optics X

23 August 2023 | San Diego, California, United States

Advances in Computational Methods for X-Ray Optics V

25 August 2020 | Online Only, California, United States

Advances in Metrology for X-Ray and EUV Optics IX

24 August 2020 | Online Only, California, United States

Advances in Metrology for X-Ray and EUV Optics VIII

11 August 2019 | San Diego, California, United States

Adaptive X-Ray Optics V

21 August 2018 | San Diego, California, United States

Advances in Computational Methods for X-Ray Optics IV

9 August 2017 | San Diego, California, United States

Advances in Metrology for X-Ray and EUV Optics VII

6 August 2017 | San Diego, California, United States

Advances in Metrology for X-Ray and EUV Optics VI

29 August 2016 | San Diego, California, United States

Adaptive X-Ray Optics IV

28 August 2016 | San Diego, California, United States

Advances in Computational Methods for X-Ray Optics III

19 August 2014 | San Diego, California, United States

Advances in Metrology for X-Ray and EUV Optics V

18 August 2014 | San Diego, California, United States

Adaptive X-Ray Optics III

17 August 2014 | San Diego, California, United States

Adaptive X-Ray Optics II

14 August 2012 | San Diego, California, United States

Advances in Metrology for X-Ray and EUV Optics IV

12 August 2012 | San Diego, California, United States

Advances in Computational Methods for X-Ray Optics II

21 August 2011 | San Diego, California, United States

Advances in Metrology for X-Ray and EUV Optics III

1 August 2010 | San Diego, California, United States

Advances in X-Ray/EUV Optics and Components IV

3 August 2009 | San Diego, California, United States

Advances in X-Ray/EUV Optics and Components III

11 August 2008 | San Diego, California, United States

Advances in Metrology for X-Ray and EUV Optics II

30 August 2007 | San Diego, California, United States

Advances in X-Ray/EUV Optics and Components II

27 August 2007 | San Diego, California, United States

Advances in X-Ray/EUV Optics, Components, and Applications

14 August 2006 | San Diego, California, United States

Showing 5 of 22 Conference Committees

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