Zobrazeno 1 - 10 of 30 pro vyhledávání: '"Rafael Celestre"'
1
Akademický článek
X-ray lens figure errors retrieved by deep learning from several beam intensity images
Autor: Manuel Sanchez del Rio, Rafael Celestre, Juan Reyes-Herrera
Publikováno v: Journal of Synchrotron Radiation, Vol 31, Iss 5, Pp 1001-1009 (2024)
The phase problem in the context of focusing synchrotron beams with X-ray lenses is addressed. The feasibility of retrieving the surface error of a lens system by using only the intensity of the propagated beam at several distances is demonstrated. A
Externí odkaz: https://doaj.org/article/1bbed202617240a4b22b30fb1cd2b60e
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2
Akademický článek
X-ray beam quality after a mirror reflection: Experimental and simulated results for a toroidal mirror in a 4th generation storage-ring beamline [version 1; peer review: 2 approved]
Autor: Juan Reyes-Herrera, Marco Cammarata, Rafael Celestre, Matteo Levantino, Raymond Barrett, Manuel Sanchez del Rio
Publikováno v: Open Research Europe, Vol 3 (2023)
Background The surface errors found in X-ray mirrors constitute a limiting factor for preserving beam quality. This is particularly important when the X-ray beam has low emittance and a significant coherence fraction, like in newly upgraded synchrotr
Externí odkaz: https://doaj.org/article/7377056a65b54b08ac7f6315f972194c
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3
Akademický článek
A fast and lightweight tool for partially coherent beamline simulations in fourth-generation storage rings based on coherent mode decomposition
Autor: Manuel Sanchez del Rio, Rafael Celestre, Juan Reyes-Herrera, Philipp Brumund, Marco Cammarata
Publikováno v: Journal of Synchrotron Radiation, Vol 29, Iss 6, Pp 1354-1367 (2022)
A new algorithm to perform coherent mode decomposition of undulator radiation is proposed. It is based on separating the horizontal and vertical directions, reducing the problem by working with one-dimension wavefronts. The validity conditions of thi
Externí odkaz: https://doaj.org/article/9df913687aae4717bdd03ca9e9a3127d
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4
Akademický článek
Polished diamond X-ray lenses
Autor: Rafael Celestre, Sergey Antipov, Edgar Gomez, Thomas Zinn, Raymond Barrett, Thomas Roth
Publikováno v: Journal of Synchrotron Radiation, Vol 29, Iss 3, Pp 629-643 (2022)
High-quality bi-concave 2D focusing diamond X-ray lenses of apex-radius R = 100 µm produced via laser-ablation and improved via mechanical polishing are presented here. Both for polished and unpolished individual lenses and for stacks of ten lenses,
Externí odkaz: https://doaj.org/article/4e0cd03d0c864d138a1a25dc23b67775
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5
Akademický článek
Propagation of partially coherent radiation using Wigner functions
Autor: Boaz Nash, Nicholas Goldring, Jonathan Edelen, Stephen Webb, Rafael Celestre
Publikováno v: Physical Review Accelerators and Beams, Vol 24, Iss 1, p 010702 (2021)
Undulator radiation from synchrotron light sources must be transported down a beam line from the source to the sample. A partially coherent photon beam may be represented in phase space using a Wigner function, and its transport may use some similar
Externí odkaz: https://doaj.org/article/e5da9289d60242f0b38bdf974017f76b
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7
Beam focus modifications by cropping partially coherent X-ray beams
Autor: Manuel Sanchez del Rio, Rafael Celestre, Juan Reyes-Herrera, Philipp Brumund, Marco Cammarata
We simulate the focusing of a partially-coherent X-ray beam emitted by an undulator in a fourth-generation storage ring performing coherent mode decomposition and wave optics propagation. The focus position is shifted, and its size is enlarged when a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d20fe30f9662cdf1ef39521dcbc6c9bf
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8
Tilting refractive x-ray lenses for fine-tuning of their focal length
Autor: Rafael Celestre, Thomas Roth, Carsten Detlefs, Peng Qi, Marco Cammarata, Manuel Sanchez del Rio, Raymond Barrett
Publikováno v: Optics Express. 31:7617
In this work, we measure and model tilted x-ray refractive lenses to investigate their effects on an x-ray beam. The modelling is benchmarked against at-wavelength metrology obtained with x-ray speckle vector tracking experiments (XSVT) at the BM05 b
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a137b3fdc909e785f4fdf8b3a118117
https://doi.org/10.1364/oe.481678
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9
Propagation of partially coherent radiation using Wigner functions
Autor: Nicholas Goldring, Boaz Nash, Jonathan Edelen, Rafael Celestre, Stephen Webb
Publikováno v: Phys.Rev.Accel.Beams
Phys.Rev.Accel.Beams, 2021, 24 (1), pp.010702. ⟨10.1103/PhysRevAccelBeams.24.010702⟩
'Physical Review Accelerators and Beams ', vol: 24, pages: 010702-1-010702-16 (2021)
Physical Review Accelerators and Beams, Vol 24, Iss 1, p 010702 (2021)
Undulator radiation from synchrotron light sources must be transported down a beamline from the source to the sample. A partially coherent photon beam may be represented in phase space using a Wigner function, and its transport may use some similar t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbd44768ef9993d7c16aa851572fcd09
https://doi.org/10.1103/physrevaccelbeams.24.010702
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10
Polished diamond x-ray lenses
Autor: Rafael Celestre, Sergey Antipov, Edgar Gomez, Thomas Zinn, Raymond Barrett, Thomas Roth
Publikováno v: JOURNAL OF SYNCHROTRON RADIATION
We present high quality bi-concave 2D focusing diamond x-ray lenses of apex-radius $R=100~\mu$m produced via laser-ablation and improved via a mechanical polishing process. Both for polished and unpolished individual lenses and for stacks of 10 lense
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::860d30d2e2651c6b9062d5ebe4740d87
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