Excalibur: A three million pixels photon counting area detector for coherent diffraction imaging based on the Medipix3 ASIC

Tartoni, N.; Dennis, G.; Gibbons, Paul; Gimenez, E.N.; Horswell, I.; Marchal, J.; Pedersen, U.; Pešić, Z. D.; Plackett, R.; Rau, Christoph; Somayaji, R.; Spiers, J.; Thompson, J. A.; Willis, B.; Angelsen, C.; Booker, P.; Burge, S.; Lipp, J.; Nicholls, T.; Taghavi, Seyed Farid; Thorpe, M.

doi:10.1109/nssmic.2012.6551164

Cited by 15 publications

(10 citation statements)

References 5 publications

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“…The beam was condensed to 10 μm using a defocussed, blazed, zoneplate assembly (D=400 μm, D = r 150 nm, efficiency 35%). To reduce vibrational effects, but allow the long propagation distances required for Bragg CXDI experiments, the 3 mega-pixel photon counting Excalibur detector [26] along with the 2 m flight-tube was mounted using a robotic cell comprising two industrial robots controllable through EPICS, mechanically separated from the sample goniometer. A polarised 632.8 nm Helium-Neon (HeNe) laser was focussed via a 0.28 NA microscope objective on to the eucentric point of the sample goniometer and aligned to the x-ray beam.…”

Section: Methodsmentioning

confidence: 99%

Coherent x-ray diffraction imaging of photo-induced structural changes in BiFeO₃nanocrystals

et al. 2016

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Multiferroic materials that exhibit coupling between ferroelectric and magnetic properties are of considerable utility for technological applications and are also interesting from a fundamental standpoint. When reduced to the nanoscale, multiferroic materials often display additional functionality that is dominated by interfacial and confinement effects. Bismuth ferrite (BiFeO 3 ) is one such material with room temperature anti-ferromagnetic and ferroelectric ordering. Optical excitation of BiFeO 3 crystals results in an elastic structural deformation of the lattice with a fast response on the pico-second time scale. Here we report on dynamic measurements to investigate the structural properties of BiFeO 3 nanoscale crystals using laser excitation and three-dimensional Bragg coherent x-ray diffraction imaging. Tensile strain beyond 8´-10 2 was observed predominantly at the surface of the nanoscale crystal as evidenced in the reconstructed phase information and was correlated to photo-induced lattice deformation.

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Section: Methodsmentioning

confidence: 99%

Coherent x-ray diffraction imaging of photo-induced structural changes in BiFeO₃nanocrystals

et al. 2016

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“…The data is recorded with the in-house developed EXCALIBUR detector [13,14], containing a 6x8 MediPix3 array with 100Hz recording speed in continuous mode and 1 kHz in burst mode. For fast recording an Eiger 500k detector is being commissioned (more details below).…”

Section: Recording Of Datamentioning

confidence: 99%

New imaging opportunities at the DIAMOND beamline I13L

Rau

Batey

Cipiccia

et al. 2019

X-Ray Nanoimaging: Instruments and Methods IV

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The Diamond Beamline I13L is dedicated to micro-and nano-imaging, with two independently operating branchlines. The imaging branch preforms imaging in real space, with In-line phase contrast imaging and grating interferometry at micrometre resolution and full-field transmission microscopy up to 50nm spatial resolution. Highest spatial resolution is achieved on the coherence branchline, where diffraction imaging methods such as Ptychography and Bragg-CDI are performed. The article provides an update about the experimental capabilities at the beamline with an emphasis on the rapidly evolving ptychography capabilities. The latter has evolved to an user-friendly method with non-expert users able to explore their science without any specific a-priory knowledge.

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“…The detectors for the branchline are based on the single photon counting MediPixIII chip and a pixel size of 55 µm. The EXCALIBUR detector has been developed in junction with STFC [10,11], measures a 2k x1.5k pixel array, which can be read out with 100 Hz in continuous mode and 1 kHz in burst mode. The detector is either held on a translation stage or for Bragg-CDI on a robot arm (see figure 3).…”

Section: The Coherence Branchlinementioning

confidence: 99%

Micro- and nano-tomography at the DIAMOND beamline I13L imaging and coherence

Rau

Bodey

Storm

et al. 2017

Developments in X-Ray Tomography XI

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The Diamond Beamline I13L is dedicated to imaging on the micro-and nano-lengthsale, operating in the energy range between 6 and 30 keV. For this purpose two independently operating branchlines and endstations have been built. The imaging branch is fully operational for micro-tomography and in-line phase contrast imaging with micrometre resolution. Grating interferometry is currently implemented, adding the capability of measuring phase and small-angle information. For tomography with increased resolution a full-field microscope providing 50 nm spatial resolution with a field of view of 100 µm is being tested. The instrument provides a large working distance between optics and sample to adapt a wide range of customised sample environments. On the coherence branch coherent diffraction imaging techniques such as ptychography, coherent X-ray diffraction (CXRD) are currently developed for three dimensional imaging with the highest resolution.The imaging branch is operated in collaboration with Manchester University, called therefore the Diamond-Manchester Branchline. The scientific applications cover a large area including bio-medicine, materials science, chemistry geology and more. The present paper provides an overview about the current status of the beamline and the science addressed..

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Excalibur: A three million pixels photon counting area detector for coherent diffraction imaging based on the Medipix3 ASIC

Cited by 15 publications

References 5 publications

Coherent x-ray diffraction imaging of photo-induced structural changes in BiFeO₃nanocrystals

Coherent x-ray diffraction imaging of photo-induced structural changes in BiFeO₃nanocrystals

New imaging opportunities at the DIAMOND beamline I13L

Micro- and nano-tomography at the DIAMOND beamline I13L imaging and coherence

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Excalibur: A three million pixels photon counting area detector for coherent diffraction imaging based on the Medipix3 ASIC

Cited by 15 publications

References 5 publications

Coherent x-ray diffraction imaging of photo-induced structural changes in BiFeO3nanocrystals

Coherent x-ray diffraction imaging of photo-induced structural changes in BiFeO3nanocrystals

New imaging opportunities at the DIAMOND beamline I13L

Micro- and nano-tomography at the DIAMOND beamline I13L imaging and coherence

Contact Info

Product

Resources

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Coherent x-ray diffraction imaging of photo-induced structural changes in BiFeO₃nanocrystals

Coherent x-ray diffraction imaging of photo-induced structural changes in BiFeO₃nanocrystals