EXCALIBUR: a small-pixel photon counting area detector for coherent X-ray diffraction - Front-end design, fabrication and characterisation

Marchal, J.; Horswell, I.; Willis, B.; Plackett, R.; Gimenez, E.N.; Spiers, J.; Ballard, D. B.; Booker, P.; Thompson, J. A.; Gibbons, Paul; Burge, S.; Nicholls, T.; Lipp, J.; Tartoni, N.

doi:10.1088/1742-6596/425/6/062003

Cited by 21 publications

(13 citation statements)

References 6 publications

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“…It was first designed for Medipix3 and has since been adapted to Timepix3 [62]. The other major activity at Diamond is the development of the EXCALIBUR readout [63]. This Medipix3RX-based system is made up of 3 individual modules each comprising a silicon ladder connected to 16 readout chips.…”

Section: Synchrotron Imagingmentioning

confidence: 99%

Asic developments for radiation imaging applications: The medipix and timepix family

Ballabriga

Llopart

Campbell

2018

Nuclear Instruments and Methods in Physics Research Section A:

128

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Hybrid pixel detectors were developed to meet the requirements for tracking in the inner layers at the LHC experiments. With low input capacitance per channel (10-100 fF) it is relatively straightforward to design pulse processing readout electronics with input referred noise of ∼100 e-rms and pulse shaping times consistent with tagging of events to a single LHC bunch crossing providing clean 'images' of the ionising tracks generated. In the Medipix Collaborations the same concept has been adapted to provide practically noise hit free imaging in a wide range of applications. This paper reports on the development of three generations of readout ASICs. Two distinctive streams of development can be identified: the Medipix ASICs which integrate data from multiple hits on a pixel and provide the images in the form of frames and the Timepix ASICs who aim to send as much information about individual interactions as possible off-chip for further processing. One outstanding circumstance in the use of these devices has been their numerous successful applications, thanks to a large and active community of developers and users. That process has even permitted new developments for detectors for High Energy Physics. This paper reviews the ASICs themselves and details some of the many applications.

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Section: Synchrotron Imagingmentioning

confidence: 99%

Asic developments for radiation imaging applications: The medipix and timepix family

Ballabriga

Llopart

Campbell

2018

Nuclear Instruments and Methods in Physics Research Section A:

128

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“…A far-field geometry was used and the detector EXCALIBUR was positioned 14.6 m downstream from the sample, well into the far-field propagation regime. EXCALIBUR is the 2069 × 1796-pixel photon-counting beamline detector, based on Medipix3 chips with 55 µm pixel size [35]. A He-filled flight tube was positioned between the sample and the detector in order to minimise absorption and scattering from air.…”

Section: Experimental Setup and Data Acquisitionmentioning

confidence: 99%

Ptychographic X-ray computed tomography at a high-brilliance X-ray source

Sala¹,

Batey²,

Prakash³

et al. 2019

Opt. Express

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Ptychographic X-ray computed tomography is a phase-contrast imaging technique capable of retrieving three-dimensional maps of the index of refraction of the imaged volumes with nanometric resolution. Despite its unmatched reach, its application remains prerogative of a limited number of laboratories at synchrotron sources. We present a detailed description of an experimental procedure and a data analysis pipeline which can be both exploited for ptychographic X-ray computed tomography experiments at any high-brilliance X-ray source. These have been validated at the I13-1 Coherence Branchline within the first experiment of its kind to be successfully carried out on a biological sample at Diamond Light Source.

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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 small-pixel photon counting area detector for coherent X-ray diffraction - Front-end design, fabrication and characterisation

Cited by 21 publications

References 6 publications

Asic developments for radiation imaging applications: The medipix and timepix family

Asic developments for radiation imaging applications: The medipix and timepix family

Ptychographic X-ray computed tomography at a high-brilliance X-ray source

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

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