Beamstop-based low-background ptychography to image weakly scattering objects

Juliane Reinhardt, Robert Hoppe, Georg Hofmann, Christian Danvad Damsgaard, Jens Patommel, Christoph Baumbach, Sina Baier, Amélie Rochet, Jan-Dierk Grunwaldt, Gerald Falkenberg, Christian G. Schroer

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In recent years, X-ray ptychography has been established as a valuable tool for high-resolution imaging. Nevertheless, the spatial resolution and sensitivity in coherent diffraction imaging are limited by the signal that is detected over noise and over background scattering. Especially, coherent imaging of weakly scattering specimens suffers from incoherent background that is generated by the interaction of the central beam with matter along its propagation path in particular close to and inside of the detector. Common countermeasures entail evacuated flight tubes or detector-side beamstops, which improve the experimental setup in terms of background reduction or better coverage of high dynamic range in the diffraction patterns. Here, we discuss an alternative approach: we combine two ptychographic scans with and without beamstop and reconstruct them simultaneously taking advantage of the complementary information contained in the two scans. We experimentally demonstrate the potential of this scheme for hard X-ray ptychography by imaging a weakly scattering object composed of catalytic nanoparticles and provide the analysis of the signal-to-background ratio in the diffraction patterns.
Original languageEnglish
JournalULTRAMICROSCOPY
Volume173
Pages (from-to)52-57
Number of pages6
ISSN0304-3991
DOIs
Publication statusPublished - 2017

Keywords

  • Background scattering
  • Beamstop
  • High resolution
  • Nanoparticles
  • Ptychography
  • Signal-to-noise

Cite this

Reinhardt, J., Hoppe, R., Hofmann, G., Damsgaard, C. D., Patommel, J., Baumbach, C., ... Schroer, C. G. (2017). Beamstop-based low-background ptychography to image weakly scattering objects. ULTRAMICROSCOPY, 173, 52-57. https://doi.org/10.1016/j.ultramic.2016.11.005
Reinhardt, Juliane ; Hoppe, Robert ; Hofmann, Georg ; Damsgaard, Christian Danvad ; Patommel, Jens ; Baumbach, Christoph ; Baier, Sina ; Rochet, Amélie ; Grunwaldt, Jan-Dierk ; Falkenberg, Gerald ; Schroer, Christian G. / Beamstop-based low-background ptychography to image weakly scattering objects. In: ULTRAMICROSCOPY. 2017 ; Vol. 173. pp. 52-57.
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title = "Beamstop-based low-background ptychography to image weakly scattering objects",
abstract = "In recent years, X-ray ptychography has been established as a valuable tool for high-resolution imaging. Nevertheless, the spatial resolution and sensitivity in coherent diffraction imaging are limited by the signal that is detected over noise and over background scattering. Especially, coherent imaging of weakly scattering specimens suffers from incoherent background that is generated by the interaction of the central beam with matter along its propagation path in particular close to and inside of the detector. Common countermeasures entail evacuated flight tubes or detector-side beamstops, which improve the experimental setup in terms of background reduction or better coverage of high dynamic range in the diffraction patterns. Here, we discuss an alternative approach: we combine two ptychographic scans with and without beamstop and reconstruct them simultaneously taking advantage of the complementary information contained in the two scans. We experimentally demonstrate the potential of this scheme for hard X-ray ptychography by imaging a weakly scattering object composed of catalytic nanoparticles and provide the analysis of the signal-to-background ratio in the diffraction patterns.",
keywords = "Background scattering, Beamstop, High resolution, Nanoparticles, Ptychography, Signal-to-noise",
author = "Juliane Reinhardt and Robert Hoppe and Georg Hofmann and Damsgaard, {Christian Danvad} and Jens Patommel and Christoph Baumbach and Sina Baier and Am{\'e}lie Rochet and Jan-Dierk Grunwaldt and Gerald Falkenberg and Schroer, {Christian G.}",
year = "2017",
doi = "10.1016/j.ultramic.2016.11.005",
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Reinhardt, J, Hoppe, R, Hofmann, G, Damsgaard, CD, Patommel, J, Baumbach, C, Baier, S, Rochet, A, Grunwaldt, J-D, Falkenberg, G & Schroer, CG 2017, 'Beamstop-based low-background ptychography to image weakly scattering objects', ULTRAMICROSCOPY, vol. 173, pp. 52-57. https://doi.org/10.1016/j.ultramic.2016.11.005

Beamstop-based low-background ptychography to image weakly scattering objects. / Reinhardt, Juliane; Hoppe, Robert; Hofmann, Georg; Damsgaard, Christian Danvad; Patommel, Jens; Baumbach, Christoph; Baier, Sina; Rochet, Amélie; Grunwaldt, Jan-Dierk; Falkenberg, Gerald; Schroer, Christian G.

In: ULTRAMICROSCOPY, Vol. 173, 2017, p. 52-57.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Beamstop-based low-background ptychography to image weakly scattering objects

AU - Reinhardt, Juliane

AU - Hoppe, Robert

AU - Hofmann, Georg

AU - Damsgaard, Christian Danvad

AU - Patommel, Jens

AU - Baumbach, Christoph

AU - Baier, Sina

AU - Rochet, Amélie

AU - Grunwaldt, Jan-Dierk

AU - Falkenberg, Gerald

AU - Schroer, Christian G.

PY - 2017

Y1 - 2017

N2 - In recent years, X-ray ptychography has been established as a valuable tool for high-resolution imaging. Nevertheless, the spatial resolution and sensitivity in coherent diffraction imaging are limited by the signal that is detected over noise and over background scattering. Especially, coherent imaging of weakly scattering specimens suffers from incoherent background that is generated by the interaction of the central beam with matter along its propagation path in particular close to and inside of the detector. Common countermeasures entail evacuated flight tubes or detector-side beamstops, which improve the experimental setup in terms of background reduction or better coverage of high dynamic range in the diffraction patterns. Here, we discuss an alternative approach: we combine two ptychographic scans with and without beamstop and reconstruct them simultaneously taking advantage of the complementary information contained in the two scans. We experimentally demonstrate the potential of this scheme for hard X-ray ptychography by imaging a weakly scattering object composed of catalytic nanoparticles and provide the analysis of the signal-to-background ratio in the diffraction patterns.

AB - In recent years, X-ray ptychography has been established as a valuable tool for high-resolution imaging. Nevertheless, the spatial resolution and sensitivity in coherent diffraction imaging are limited by the signal that is detected over noise and over background scattering. Especially, coherent imaging of weakly scattering specimens suffers from incoherent background that is generated by the interaction of the central beam with matter along its propagation path in particular close to and inside of the detector. Common countermeasures entail evacuated flight tubes or detector-side beamstops, which improve the experimental setup in terms of background reduction or better coverage of high dynamic range in the diffraction patterns. Here, we discuss an alternative approach: we combine two ptychographic scans with and without beamstop and reconstruct them simultaneously taking advantage of the complementary information contained in the two scans. We experimentally demonstrate the potential of this scheme for hard X-ray ptychography by imaging a weakly scattering object composed of catalytic nanoparticles and provide the analysis of the signal-to-background ratio in the diffraction patterns.

KW - Background scattering

KW - Beamstop

KW - High resolution

KW - Nanoparticles

KW - Ptychography

KW - Signal-to-noise

U2 - 10.1016/j.ultramic.2016.11.005

DO - 10.1016/j.ultramic.2016.11.005

M3 - Journal article

C2 - 27912167

VL - 173

SP - 52

EP - 57

JO - Ultramicroscopy

JF - Ultramicroscopy

SN - 0304-3991

ER -