Strategies for high-throughput focused-beam ptychography

Jacobsen, Chris; Deng, Junjing; Nashed, Youssef S. G.

doi:10.1107/s1600577517009869

Cited by 34 publications

(10 citation statements)

References 27 publications

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“…For example, in ptychography, the longitudinal coherence requirements can be quite modest and use of broader bandpass monochromators such as multilayers may offer some advantages in these circumstances. Optimization of the setup for high-throughput ptychography has been discussed in a recent paper by Jacobsen et al (2017).…”

Section: Discussionmentioning

confidence: 99%

A comparison of absorption and phase contrast for X-ray imaging of biological cells

Nave

2018

J Synchrotron Radiat

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Section: Discussionmentioning

confidence: 99%

A comparison of absorption and phase contrast for X-ray imaging of biological cells

Nave

2018

J Synchrotron Radiat

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“…Coherent diffraction imaging (CDI) [1,2] and its scanning version ptychography [3,4] emerged as a promising approach for reaching diffraction limited resolution in both 2D [5,6] and 3D [7,8]. Although it is well recognized that this diffraction-based imaging technique is able to resolve features beyond the resolution limit imposed by x-ray optics, it has been pointed out that using a nano-focused beam for ptychography provides several benefits [9], including reducing the number of necessary detector pixels, relaxing x-ray bandwidth, ameliorating detection dynamic range, enabling high-resolution multi-modality imaging mode, and decreasing the required dwell time. In the hard x-ray regime, the multilayer Laue lens (MLL) has been proposed as a volume diffractive optics alternative to Fresnel zone plate to produce sub-10 nm focus with high efficiency [10,11].…”

Section: Introductionmentioning

confidence: 99%

Multi-slice ptychography with large numerical aperture multilayer Laue lenses

Öztürk¹,

Yan²,

He³

et al. 2018

Optica

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The highly convergent x-ray beam focused by multilayer Laue lenses with large numerical apertures is used as a threedimensional (3D) probe to image layered structures with an axial separation larger than the depth of focus. Instead of collecting weakly scattered high-spatial-frequency signals, the depth-resolving power is provided purely by the intense central cone diverged from the focused beam. Using the multi-slice ptychography method combined with the on-the-fly scan scheme, two layers of nanoparticles separated by 10 μm are successfully reconstructed with 8.1 nm lateral resolution and with a dwell time as low as 0.05 s per scan point. This approach obtains high-resolution images with extended depth of field, which paves the way for multi-slice ptychography as a high throughput technique for high-resolution 3D imaging of thick samples.

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“…This problem has already been discussed in previous works on coherent X-ray imaging techniques (Jacobsen et al, 2017;Enders et al, 2014;Abbey et al, 2011;van der Veen & Pfeiffer, 2004). Briefly, the beam size D must fulfill the following condition:…”

Section: X-ray Longitudinal Coherencementioning

confidence: 75%

Overcoming the challenges of high-energy X-ray ptychography

et al. 2019

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X‐ray ptychography is a coherent diffraction imaging technique with a high resolving power and excellent quantitative capabilities. Although very popular in synchrotron facilities nowadays, its implementation with X‐ray energies above 15 keV is very rare due to the challenges imposed by the high energies. Here, the implementation of high‐energy X‐ray ptychography at 17 and 33.6 keV is demonstrated and solutions to overcome the important challenges are provided. Among the particular aspects addressed are the use of an efficient high‐energy detector, a long synchrotron beamline for the high degree of spatial coherence, a beam with 1% monochromaticity providing high flux, and efficient multilayer coated Kirkpatrick–Baez X‐ray optics to shape the beam. The constraints imposed by the large energy bandwidth are carefully analyzed, as well as the requirements to sample correctly the high‐energy diffraction patterns with small speckle size. In this context, optimized scanning trajectories allow the total acquisition time to be reduced by up to 35%. The paper explores these innovative solutions at the ID16A nano‐imaging beamline by ptychographic imaging of a 200 nm‐thick gold lithography sample.

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Strategies for high-throughput focused-beam ptychography

Cited by 34 publications

References 27 publications

A comparison of absorption and phase contrast for X-ray imaging of biological cells

A comparison of absorption and phase contrast for X-ray imaging of biological cells

Multi-slice ptychography with large numerical aperture multilayer Laue lenses

Overcoming the challenges of high-energy X-ray ptychography

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