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Laser ablation of high-aspect-ratio hole arrays in tungsten for X-ray applications

Autor: Chantal Silvestre, Jens H. Hemmingsen, Jan Kehres, E.S. Dreier, Ole Hansen

Publikováno v: Silvestre, C M, Hemmingsen, J H, Dreier, E S, Kehres, J & Hansen, O 2019, ' Laser ablation of high-aspect-ratio hole arrays in tungsten for X-ray applications ', Microelectronic Engineering, vol. 209, pp. 60-65 . https://doi.org/10.1016/j.mee.2019.03.007

Periodic two-dimensional tungsten X-ray optical gratings were fabricated using a combination of pico-second laser ablation and wet chemical etch. A 200 μm thick cold-rolled sheet of tungsten (99.97%) was used as base material for the fabrication of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20a29e46838493954940d072bd161ae0
https://doi.org/10.1016/j.mee.2019.03.007

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Tracking based, high-resolution single-shot multimodal x-ray imaging in the laboratory enabled by the sub-pixel resolution capabilities of the MoNCH detector

Autor: Rolf Brönnimann, E.S. Dreier, Anna Bergamaschi, GK Kallon, Ulrik Lund Olsen, Alessandro Olivo, Marco Endrizzi

Publikováno v: Dreier, E S, Bergamaschi, A, Kallon, G K, Broennimann, R, Olsen, U L, Olivo, A & Endrizzi, M 2020, ' Tracking based, high-resolution single-shot multimodal x-ray imaging in the laboratory enabled by the sub-pixel resolution capabilities of the MoNCH detector ', Applied Physics Letters, vol. 117, no. 26, 264101 . https://doi.org/10.1063/5.0027763
Dreier, E S, Bergamaschi, A, Kallon, G K, Brönnimann, R, Olsen, U L, Olivo, A & Endrizzi, M 2020, ' Tracking based, high-resolution single-shot multimodal x-ray imaging in the laboratory enabled by the sub-pixel resolution capabilities of the MÖNCH detector ', Applied Physics Letters, vol. 117, no. 26, 264101 . https://doi.org/10.1063/5.0027763

The simultaneous retrieval of x-ray attenuation, phase, and scattering using multimodal imaging techniques is finding increasing use in a range of applications, from medicine to materials science. Most techniques rely on the mechanical movement of an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6603c6b19a72de292deb13215419041
https://curis.ku.dk/portal/da/publications/tracking-based-highresolution-singleshot-multimodal-xray-imaging-in-the-laboratory-enabled-by-the-subpixel-resolution-capabilities-of-the-monch-detector(ea035c0a-1f30-453b-9db1-bab45e39cce6).html

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Subpixel resolution in CdTe Timepix3 pixel detectors

Autor: J. Jakubek, Mohamad Khalil, E.S. Dreier, Ulrik Lund Olsen, Jan Kehres

Publikováno v: Journal of Synchrotron Radiation. 25:1650-1657

Timepix3 (256 × 256 pixels with a pitch of 55 µm) is a hybrid-pixel-detector readout chip that implements a data-driven architecture and is capable of simultaneous time-of-arrival (ToA) and energy (ToT: time-over-threshold) measurements. The ToA in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a91a077dd47bddfe79be430ebc7aae9a
https://doi.org/10.1107/s1600577518013838

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Single-shot, omni-directional x-ray scattering imaging with a laboratory source and single-photon localization

Autor: Jan Kehres, J. Jakubek, Chantal Silvestre, Ulrik Lund Olsen, Ole Hansen, Daniel Turecek, E.S. Dreier, Robert Feidenhans'l, Mohamad Khalil, Jens H. Hemmingsen

Publikováno v: Dreier, E S, Silvestre, C, Kehres, J, Turecek, D, Khalil, M, Hemmingsen, J H, Hansen, O, Jakubek, J, Feidenhans'l, R & Olsen, U L 2020, ' Single-shot, omni-directional x-ray scattering imaging with a laboratory source and single-photon localization ', Optics Letters, vol. 45, no. 4, pp. 1021-1024 . https://doi.org/10.1364/OL.381420
Dreier, E S, Silvestre, C, Kehres, J, Turecek, D, Khalil, M, Hemmingsen, J H, Hansen, O, Jakubek, J, Feidenhans'l, R K & Olsen, U L 2020, ' Single-shot, omni-directional x-ray scattering imaging with a laboratory source and single-photon localization ', Optics Letters, vol. 45, no. 4, pp. 1021-1024 . https://doi.org/10.1364/ol.381420

Omni-directional, ultra-small-angle x-ray scattering imaging provides a method to measure the orientation of micro-structures without having to resolve them. In this letter, we use single-photon localization with the Timepix3 chip to demonstrate, to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::558dd810f9d7996b7c7fe691ce636ea2
https://doi.org/10.1364/ol.381420

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Simulation tools for scattering corrections in spectrally resolved X-ray Computed Tomography using McXtrace

Autor: Kristoffer Haldrup, Erik Knudsen, Ulrik Lund Olsen, Jeppe Revall Frisvad, Mohamad Khalil, E.S. Dreier, Jan Kehres, Matteo Busi

Publikováno v: Busi, M, Olsen, U L, Knudsen, E B, Frisvad, J R, Kehres, J & Dreier, E S 2018, ' Simulation tools for scattering corrections in spectrally resolved X-ray Computed Tomography using McXtrace ', Optical Engineering, vol. 57, no. 3, 037105 . https://doi.org/10.1117/1.OE.57.3.037105

Spectral computed tomography is an emerging imaging method that involves using recently developed energy discriminating photon-counting detectors (PCDs). This technique enables measurements at isolated high-energy ranges, in which the dominating unde

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a7b231ecf3d4f2a5295aa3bcae2c515
https://orbit.dtu.dk/en/publications/a15d7252-ccf8-443e-8cdf-8b80d978cd91

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Intrinsic XRF corrections in Timepix3 CdTe spectral detectors

Autor: Jan Kehres, J. Jakubek, E.S. Dreier, Mohamad Khalil, D. Turecek, Ulrik Lund Olsen

Publikováno v: Journal of Instrumentation. 14:C01018-C01018

One of the limitations of Hybrid Pixel Detectors (HPD) is the intrinsic X-ray fluorescence emission from the detector semiconductor sensor. These fluorescence photons cause artifacts and false peaks in the photon energy spectrum measured by the HPD .

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6d10e468fdda44aa3742977471b0a0da
https://doi.org/10.1088/1748-0221/14/01/c01018

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Virtual subpixel approach for single-mask phase-contrast imaging using Timepix3

Autor: J. Jakubek, Daniel Turecek, E.S. Dreier, Mohamad Khalil, Chantal Silvestre, Jan Kehres, Robert Feidenhans'l, Jens H. Hemmingsen, Ulrik Lund Olsen, Ole Hansen

Publikováno v: Dreier, E S, Silvestre, C, Kehres, J, Turecek, D, Khalil, M, Hemmingsen, J H, Hansen, O, Jakubek, J, Feidenhans'l, R & Olsen, U L 2019, ' Virtual subpixel approach for single-mask phase-contrast imaging using Timepix3 ', Journal of Instrumentation, vol. 14, c01011 . https://doi.org/10.1088/1748-0221/14/01/C01011

X-ray phase contrast imaging provides a method to distinguish materials with similar density and effective atomic number, which otherwise would be difficult using conventional X-ray absorption contrast. In recent years, multiple methods have been dev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::efb3de883255d6a0ffc9ae7275eeba41
https://doi.org/10.1088/1748-0221/14/01/c01011

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Spectral correction algorithm for multispectral CdTe x-ray detectors

Autor: Yun Gu, Ulrik Lund Olsen, Jan Kehres, Robert Feidenhans'l, Matteo Busi, Mohamad Khalil, E.S. Dreier

Publikováno v: Dreier, E S, Kehres, J, Khalil, M, Busi, M, Gu, Y, Feidenhans'l, R K & Olsen, U L 2018, ' Spectral correction algorithm for multispectral CdTe x-ray detectors ', Optical Engineering, vol. 57, no. 5, 054117 . https://doi.org/10.1117/1.OE.57.5.054117

Compared to the dual-energy scintillator detectors widely used today, energy-resolved photon-counting x-ray detectors show the potential to improve material identification in various radiography and tomography applications used for industrial and sec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3da9ac5bd58734b7eadecd4867a0dd78
https://doi.org/10.1117/1.oe.57.5.054117

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