High-dynamic-range water window ptychography

Rose, M. Franklin; Dzhigaev, Dmitry; Senkbeil, Tobias; Gundlach, Andreas R. von; Stuhr, Susan; Rumancev, Christoph; Besedin, Ilya; Skopintsev, Petr; Viefhaus, Jens; Rosenhahn, Axel; Vartanyants, Ivan A.

doi:10.1088/1742-6596/849/1/012027

Cited by 3 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5(a)]. In accordance with literature, only the central lobe has been fitted with a Gaussian in order to determine the transverse coherence length [12,47,50]. It has been suggested that the increase of the CCF at larger ∆r arises from the contribution of higher residual coherence modes to the fundamental coherent mode [51].…”

Section: Spatial-coherence Measurements At the Beamline P04 At Petra IIImentioning

confidence: 78%

“…To gain detailed knowledge of the coherence properties of X-ray radiation, its manipulation, and especially its preservation plays an increasingly important role at synchrotron beamlines, not least because of present and future upgrades of synchrotron facilities to diffraction-limited storage rings, e.g., PETRA IV [1], ALS-U [2,3], ESRF-EBS [4] or MAX IV [5]. The most obvious beneficiaries of a high coherent flux are coherent imaging and scattering experiments such as Fourier-transform holography (FTH) [6][7][8][9], X-ray ptychography [10][11][12][13], coherent diffractive imaging (CDI) [14][15][16], scanning transmission X-ray microscopy (STXM) [17][18][19], as well as X-ray photon correlation spectroscopy (XPCS) [20][21][22]. For these experiments, the knowledge of the intrinsic coherence properties of the X-ray source, as well as the impact of beamline apertures and optics, is essential for optimizing the experimental conditions and a correct interpretation of the data.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Direct 2D spatial-coherence determination using the Fourier-analysis method: multi-parameter characterization of the P04 beamline at PETRA III

Bagschik¹,

Wagner²,

Buss³

et al. 2020

Opt. Express

Self Cite

View full text Add to dashboard Cite

We present a systematic 2D spatial-coherence analysis of the soft-X-ray beamline P04 at PETRA III for various beamline configurations. The influence of two different beam-defining apertures on the spatial coherence properties of the beam is discussed and optimal conditions for coherence-based experiments are found. A significant degradation of the spatial coherence in the vertical direction has been measured and sources of this degradation are identified and discussed. The Fourier-analysis method, which gives fast and simple access to the 2D spatial coherence function of the X-ray beam, is used for the experiment. Here, we exploit the charge scattering of a disordered nanodot sample allowing the use of arbitrary X-ray photon energies with this method.

show abstract

Section: Spatial-coherence Measurements At the Beamline P04 At Petra IIImentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Direct 2D spatial-coherence determination using the Fourier-analysis method: multi-parameter characterization of the P04 beamline at PETRA III

Bagschik¹,

Wagner²,

Buss³

et al. 2020

Opt. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…Chemical element specific contrast was also obtained in another study to highlight the unique imaging opportunities in the water window [25]. We have tested high-dynamic range (HDR) ptychographic measurements using double exposures with and without beam stop on a test sample and achieved 18 nm resolution [26]. In this work we present the significant improvement of (HDR) measurements of a biological cell with soft X-rays using double exposures with and without beam stop.…”

Section: Introductionmentioning

confidence: 94%

Quantitative ptychographic bio-imaging in the water window

Rose¹,

Senkbeil²,

Gundlach³

et al. 2018

Opt. Express

Self Cite

View full text Add to dashboard Cite

Coherent X-ray ptychography is a tool for highly dose efficient lensless nano-imaging of biological samples. We have used partially coherent soft X-ray synchrotron radiation to obtain a quantitative image of a laterally extended, dried, and unstained fibroblast cell by ptychography. We used data with and without a beam stop that allowed us to measure coherent diffraction with a high-dynamic range of 1.7·10. As a quantitative result, we obtained the refractive index values for two regions of the cell with respect to a reference area. Due to the photon energy in the water window we obtained an extremely high contrast of 53% at 71 nm half-period resolution. The dose applied in our experiment was 9.5·10 Gy and is well below the radiation damage threshold. The concept for dynamic range improvement for low dynamic range detectors with a beam stop opens the path for high resolution nano-imaging of a variety of samples including cryo-preserved, hydrated and unstained biological cells.

show abstract

The PERCIVAL detector: first user experiments

Correa¹,

Mehrjoo²,

Battistelli³

et al. 2023

J Synchrotron Radiat

View full text Add to dashboard Cite

The PERCIVAL detector is a CMOS imager designed for the soft X-ray regime at photon sources. Although still in its final development phase, it has recently seen its first user experiments: ptychography at a free-electron laser, holographic imaging at a storage ring and preliminary tests on X-ray photon correlation spectroscopy. The detector performed remarkably well in terms of spatial resolution achievable in the sample plane, owing to its small pixel size, large active area and very large dynamic range; but also in terms of its frame rate, which is significantly faster than traditional CCDs. In particular, it is the combination of these features which makes PERCIVAL an attractive option for soft X-ray science.

show abstract

High-dynamic-range water window ptychography

Cited by 3 publications

References 11 publications

Direct 2D spatial-coherence determination using the Fourier-analysis method: multi-parameter characterization of the P04 beamline at PETRA III

Direct 2D spatial-coherence determination using the Fourier-analysis method: multi-parameter characterization of the P04 beamline at PETRA III

Quantitative ptychographic bio-imaging in the water window

The PERCIVAL detector: first user experiments

Contact Info

Product

Resources

About