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High-flux ptychographic imaging using the new 55 μm-pixel detector 'Lambda' based on the Medipix3 readout chip

Wilke, R. N.; Wallentin, J. LU ; Osterhoff, M.; Pennicard, D.; Zozulya, A.; Sprung, M. and Salditt, T. (2014) In Acta Crystallographica Section A: Foundations and Advances 70. p.552-562
Abstract

Suitable detection systems that are capable of recording high photon count rates with single-photon detection are instrumental for coherent X-ray imaging. The new single-photon-counting pixel detector 'Lambda' has been tested in a ptychographic imaging experiment on solar-cell nanowires using Kirkpatrick-Baez-focused 13.8 keV X-rays. Taking advantage of the high count rate of the Lambda and dynamic range expansion by the semi-transparent central stop, a high-dynamic-range diffraction signal covering more than seven orders of magnitude has been recorded, which corresponds to a photon flux density of about 105 photons nm-2 s-1 or a flux of ∼1010 photons s-1 on the sample. By... (More)

Suitable detection systems that are capable of recording high photon count rates with single-photon detection are instrumental for coherent X-ray imaging. The new single-photon-counting pixel detector 'Lambda' has been tested in a ptychographic imaging experiment on solar-cell nanowires using Kirkpatrick-Baez-focused 13.8 keV X-rays. Taking advantage of the high count rate of the Lambda and dynamic range expansion by the semi-transparent central stop, a high-dynamic-range diffraction signal covering more than seven orders of magnitude has been recorded, which corresponds to a photon flux density of about 105 photons nm-2 s-1 or a flux of ∼1010 photons s-1 on the sample. By comparison with data taken without the semi-transparent central stop, an increase in resolution by a factor of 3-4 is determined: from about 125 nm to about 38 nm for the nanowire and from about 83 nm to about 21 nm for the illuminating wavefield.

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author
publishing date
type
Contribution to journal
publication status
published
keywords
coherent diffractive imaging, Lambda detector, Medipix3 chip, phase retrieval, ptychography, semi-transparent beam stop, semi-transparent central stop, solar-cell nanowires
in
Acta Crystallographica Section A: Foundations and Advances
volume
70
pages
11 pages
publisher
John Wiley and Sons Inc.
external identifiers
  • scopus:84992735831
DOI
10.1107/S2053273314014545
language
English
LU publication?
no
id
5c361504-0a37-4b6c-af03-75f939bfef65
date added to LUP
2017-12-13 16:34:11
date last changed
2019-05-21 03:55:42
@article{5c361504-0a37-4b6c-af03-75f939bfef65,
  abstract     = {<p>Suitable detection systems that are capable of recording high photon count rates with single-photon detection are instrumental for coherent X-ray imaging. The new single-photon-counting pixel detector 'Lambda' has been tested in a ptychographic imaging experiment on solar-cell nanowires using Kirkpatrick-Baez-focused 13.8 keV X-rays. Taking advantage of the high count rate of the Lambda and dynamic range expansion by the semi-transparent central stop, a high-dynamic-range diffraction signal covering more than seven orders of magnitude has been recorded, which corresponds to a photon flux density of about 10<sup>5</sup> photons nm<sup>-2</sup> s<sup>-1</sup> or a flux of ∼10<sup>10</sup> photons s<sup>-1</sup> on the sample. By comparison with data taken without the semi-transparent central stop, an increase in resolution by a factor of 3-4 is determined: from about 125 nm to about 38 nm for the nanowire and from about 83 nm to about 21 nm for the illuminating wavefield.</p>},
  author       = {Wilke, R. N. and Wallentin, J. and Osterhoff, M. and Pennicard, D. and Zozulya, A. and Sprung, M. and Salditt, T.},
  keyword      = {coherent diffractive imaging,Lambda detector,Medipix3 chip,phase retrieval,ptychography,semi-transparent beam stop,semi-transparent central stop,solar-cell nanowires},
  language     = {eng},
  month        = {11},
  pages        = {552--562},
  publisher    = {John Wiley and Sons Inc.},
  series       = {Acta Crystallographica Section A: Foundations and Advances},
  title        = {High-flux ptychographic imaging using the new 55 μm-pixel detector 'Lambda' based on the Medipix3 readout chip},
  url          = {http://dx.doi.org/10.1107/S2053273314014545},
  volume       = {70},
  year         = {2014},
}