Cateretê Beamline

The CATERETÊ (Coherent And TimE REsolved ScatTEring) beamline will provide unique capabilities in biological and soft materials imaging and dynamics experiments with particular focus on the application of coherent X-ray scattering and diffraction techniques. Coherent X-ray diffractive imaging (CXDI) and X-ray photon correlation spectroscopy (XPCS) experiments will be at the heart of the activities planned at the CATERETÊ beamline, but also time-resolved small angle X-ray scattering (SAXS) and Ultra-Small Angle (USAXS), which will benefit of the high flux of the source. The CATERETÊ beamline will operate in the 5 keV to 20 keV range to generate images of biological and nanomaterials, taking full advantage of the coherence properties of the radiation provided by Sirius.

The CATERETÊ beamline will make possible to answer diverse and multiple questions related to life sciences (biological and medical applications), structural biology (proteins, lipids, macromolecules) and the vast field of material sciences including nanotechnology (energy, food and health, photonics), polymer sciences, catalysis, rheology and environmental sciences (geosciences, oil prospection, catalysis). Therefore, all major research fields in physics, chemistry, and biology, as well as industrial aspects, will be explored on CATERETÊ.


Facility Tel.: +55 19 3518 2349
Facility E-mail: caterete@lnls.br

Coordination: Florian E. P. Meneau
Tel.: +55 19 3512 1132
E-mail: florian.meneau@lnls.br

Click here  for more information on this Facility team.



CXDI is a high resolution, lensless-imaging technique in which an image is obtained from the X-ray diffraction pattern. An isolated object is illuminated with coherent X-rays and the resulting diffraction pattern is recorded in the far field. Then, a phase retrieval algorithm is applied to recover the phase and obtain the image in real space. CXDI can reveal the complex 3-dimensional morphology of a wide variety of crystalline and non-crystalline materials with nanometric resolution.


This technique allows the investigation of dynamics on nanometric scale based on the observation of fluctuations in the intensity of the coherent X-ray speckle pattern over time. XPCS is ideally suited for probing structural dynamics on a variety of nanometer length scales and over a time span ranging from milliseconds to hundreds of seconds and is suitable for the study of soft and hard condensed matter.


These techniques allow the determination of structural parameters such as molecular distances, radius of gyration, pore sizes, morphology, state of aggregation etc., with dimensions ranging from ångström to several micrometers. In addition, it is possible to perform time resolved SAXS and USAXS to follow changes in size and property in soft matter and biological systems with time-resolution from sub-milliseconds up to minutes. The combination of SAXS/USAXS allows the elucidation of static and transitory hierarchical structures in soft condensed matter, biophysical systems and non-crystalline biological structures.



Ptychography is available for 2D and 3D imaging at 3.8 and 10 keV (pink beam (ΔE/E = 1-2%)). Samples are on silicon nitride membranes and aligned with an on-axis microscope. The setup is compatible with a cryo-system which is still under commissioning and will be available soon. 2D and 3D reconstructions can be retrieved by an in-house software.


XPCS can be performed in SAXS geometry at 10 keV (pink beam (ΔE/E = 1%)) with up to 28 m sample to detector distance. In-air sample stage for capillaries and wafers are available, a heating stage is under commissioning and will be available soon.  XPCS data analysis can be performed by an in-house python code.


Element Type Position [m] Description
SOURCE Undulator
VFM Vertical focusing mirror 27
Mono 4 crystal monochormator 56 Fixed exit, double channel-cut
HFM Horizontal focusing mirror 57
Sample 88
Detector (SAXS) Medipix 90-118 Medipix3 3000 x 3000 pixels²
Detector (WAXS) 0.3-1.5


Parameter Value Condition
Energy Range 5 – 20 keV
Coherence flux > 10 11 ph/s @ 6 keV

> 10 10 ph/s @ 9 keV
KYMA undulator
Beam size at sample 1 – 30 µm
Sample to detector distance up to 30 m


  • H. Westfahl, S. Lordano Luiz, B. C. Meyer and F. Meneau. The coherent radiation fraction of low-emittance synchrotrons, J. Synchrotron Rad. 24, 566-575, 2017. DOI: 10.1107/S1600577517003058
  • L. Liu, H. Westfahl. Towards Diffraction Limited Storage Ring Based Light Sources, Proceedings of IPAC2017, 1203-1208, 2017. DOI: 10.18429/JACoW-IPAC2017-TUXA1


  • C. C. Polo, M. H. Fonseca-Alaniz, J. Chen, A. Ekman, G. McDermott, F. Meneau, J. E. Krieger, A. A. Miyakawa. Three-dimensional imaging of mitochondrial cristae complexity using cryo-soft X-ray tomography. Scientific Reports, 10, 21045, 2020. DOI: 10.1038/s41598-020-78150-3
  • A. R. Passos, A. Rochet, L. M. Manente, A. F. Suzana, R. Harder, W. Cha, F. Meneau. Three-dimensional strain dynamics govern the hysteresis in heterogeneous catalysis. Nature Communications, 11, 4733, 2020. DOI: 10.1038/s41467-020-18622-2
  • C. C. Polo, L. Pereira, P. Mazzafera, D. N. A. Flores-Borges, J. L. S. Mayer, M. Guizar-Sicairos, M. Holler, M. Barsi-Andreeta, H. Westfahl Jr, F. Meneau. Correlations between lignin content and structural robustness in plants revealed by X-ray ptychography. Scientific Reports, 10, 6023, 2020. DOI: 10.1038/s41598-020-63093-6
  • A. Suzana, A. Rochet, A. R. Passos, J. Zerba, C. Polo, C. V. Santilli, S. Pulcinelli, F. Berenguer, R. Harder, E. Maxey, F. Meneau. In situ three-dimensional imaging of strain in gold nanocrystals during catalytic oxidation. Nanoscale Advances, 1, 3009-3014, 2019. DOI: 10.1039/C9NA00231F
  • A. Rochet, A. Suzana, A. R. Passos, T. Kalile, F. Berenguer, C. V. Santilli, S. Pulcinelli, F. Meneau. In situ reactor to image catalysts at work in three-dimensions by Bragg coherent X-ray diffraction, Catalysis Today, 336, 169-173, 2019. DOI: 10.1016/j.cattod.2018.12.020
  • C. Polo, L. Pereira, D. Flores, M. Guizar-Sicairos, M. Holler, P. Mazzafera, J. Mayer, H. Westfahl, F. Meneau. Lignin deposition in arabidopsis thaliana cell walls unveiled by ptychographic X-Ray computed tomography (PXCT). Microscopy and Microanalysis, 24, 386-387, 2018. DOI: 10.1017/S1431927618014216