Zobrazeno 1 - 10
of 86
pro vyhledávání: '"David Laundy"'
Publikováno v:
Journal of Synchrotron Radiation, Vol 31, Iss 3, Pp 438-446 (2024)
Knife-edge imaging is a successful method for determining the wavefront distortion of focusing optics such as Kirkpatrick–Baez mirrors or compound refractive lenses. In this study, the wavefront error of an imperfect elliptical mirror is predicted
Externí odkaz:
https://doaj.org/article/cacdf054119544e2acc3df38092959d3
Autor:
Vishal Dhamgaye, David Laundy, Hossein Khosroabadi, Thomas Moxham, Sara Baldock, Oliver Fox, Kawal Sawhney
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-7 (2023)
Abstract Visible light optical elements such as lenses and mirrors have counterparts for X-rays. In the visible regime, a variable focusing power can be achieved by an Alvarez lens which consists of a pair of inline planar refractors with a cubic thi
Externí odkaz:
https://doaj.org/article/ea237d22fac6461995ca62a815b777ad
Publikováno v:
Synchrotron Radiation News. 34:27-31
Autor:
Thomas Moxham, O J L Fox, Alexander M. Korsunsky, V. P. Dhamgaye, David Laundy, Kawal Sawhney
Ptychography is a scanning coherent diffraction imaging technique that provides high-resolution imaging and complete spatial information of the complex probe and object transmission function. The wavefront error caused by aberrated optics has previou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7cc8d26112e2cb41394c4488464e35d0
https://doi.org/10.1063/5.0041341
https://doi.org/10.1063/5.0041341
Autor:
Vishal Dhamgaye, David Laundy, Thomas Moxham, Sara Baldock, Hossein Khosroabadi, Oliver Fox, Kawal Sawhney
In the X-ray region, there exist optical elements analogous to lenses and mirrors for visible light. For visible light, a variable focusing power can be achieved by Alvarez lenses which consist of a pair of inline planar refractors with a cubic thick
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::559a19b7dfef16e8eb4ff1fd8243d5ad
https://doi.org/10.21203/rs.3.rs-1825147/v1
https://doi.org/10.21203/rs.3.rs-1825147/v1
Publikováno v:
Journal of Synchrotron Radiation
The knife-edge imaging-based wavefront-sensing technique is used for wavefront error characterization of Be X-ray lenses with and without corrector plate. Different 3D printed corrector plates are proposed to achieve pseudo-perfect compensation of wa
Autor:
Thomas E. J. Moxham, Vishal Dhamgaye, David Laundy, Oliver J. L. Fox, Hossein Khosroabadi, Kawal Sawhney, Alexander M. Korsunsky
Publikováno v:
Optics Express. 30:19185
Aberrations introduced during fabrication degrade the performance of X-ray optics and their ability to achieve diffraction limited focusing. Corrective optics can counteract these errors by introducing wavefront perturbations prior to the optic which
Publikováno v:
Advances in Computational Methods for X-Ray Optics V.
The weak refraction of X-rays allows refracting optical elements to be fabricated that perturb the X-ray phase at the picometre level. This allows fine correction of the X-ray wavefront from imperfect optical elements. Adaptable refractive correcting
Autor:
V. P. Dhamgaye, O J L Fox, Aaron Parsons, David Laundy, Tunhe Zhou, Hongchang Wang, Thomas Moxham, L. Alianelli, Alexander M. Korsunsky, Kawal Sawhney
Publikováno v:
Journal of Synchrotron Radiation
Ptychography has been developed and routinely employed as an at-wavelength metrology method on a low coherence dipole magnet beamline.
Ptychography is a scanning coherent diffraction imaging technique which provides high resolution imaging and c
Ptychography is a scanning coherent diffraction imaging technique which provides high resolution imaging and c
Autor:
Kawal Sawhney, Anna J. Warren, Gwyndaf Evans, David Laundy, José Trincão, Graham Duller, V. P. Dhamgaye
Publikováno v:
AIP Conference Proceedings.
Third generation synchrotron radiation sources offer the possibility of using high demagnification ratio optics to achieve a micro-focused X-ray beam profile of size less than one micrometre size. This is highly advantageous for a variety of experime