Detectors
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Alessandro
Marras
,
Jonathan
Correa
,
Sabine
Lange
,
Vahagn
Vardanyan
,
Tim
Gerhardt
,
Manuela
Kuhn
,
Frantisek
Krivan
,
Igor
Shevyakov
,
Manfred
Zimmer
,
Moritz
Hoesch
,
Kai
Bagschik
,
Frank
Scholz
,
Niccolo
Guerrini
,
Ben
Marsh
,
Iain
Sedgwick
,
Giuseppe
Cautero
,
Dario
Giuressi
,
Gregori
Iztok
,
Ralf H.
Menk
,
Martin
Scarcia
,
Luigi
Stebel
,
Tim
Nicholls
,
William
Nichols
,
Ulrik K.
Pedersen
,
Polad
Shikhaliev
,
Nicola
Tartoni
,
Hyojung
Hyun
,
Seonghan
Kim
,
Kyungsook
Kim
,
Seungyu
Rah
,
Arkadiusz
Dawiec
,
Fabienne
Orsini
,
Giovanni
Pinaroli
,
Alan
Greer
,
Steve
Aplin
,
April D.
Jewell
,
Todd J.
Jones
,
Shouleh
Nikzad
,
Michael E.
Hoenk
,
Frank
Okrent
,
Heinz
Graafsma
,
Cornelia B.
Wunderer
Open Access
Abstract: In this paper the back-side-illuminated Percival 2-Megapixel (P2M) detector is presented, along with its characterization by means of optical and X-ray photons. For the first time, the response of the system to soft X-rays (250 eV to 1 keV) is presented. The main performance parameters of the first detector are measured, assessing the capabilities in terms of noise, dynamic range and single-photon discrimination capability. Present limitations and coming improvements are discussed.
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Jan 2021
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Detectors
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Abstract: At synchrotron facilities, many X-ray imaging and diffraction experiments require pixel detectors with minimal noise, high speed and reasonably small pixel size, all of which can be achieved with the Medipix ASIC family. So, ESRF, Diamond Light Source and DESY have developed detector systems based on Medipix. In this paper, we report on these developments, with an emphasis on the challenges involved building readout systems and the potential of the Medipix family ASICs in this field of research.
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Oct 2020
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B16-Test Beamline
Detectors
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K.
Metodiev
,
M.
Mironova
,
D.
Bortoletto
,
R.
Plackett
,
P.
Allport
,
I.
Asensi Tortajada
,
R.
Cardella
,
F.
Dachs
,
V.
Dao
,
M.
Dyndal
,
L.
Flores Sanz De Acedo
,
P.
Freeman
,
A.
Gabrielli
,
L.
Gonella
,
M.
Munker
,
H.
Pernegger
,
F.
Piro
,
P.
Riedler
,
A.
Sharma
,
E. J.
Schioppa
,
I.
Shipsey
,
W.
Snoeys
,
C.
Solans Sanchez
,
H.
Wennloef
,
D. P.
Weatherill
,
D.
Wood
,
S.
Worm
Diamond Proposal Number(s):
[2206]
Abstract: Detector prototypes are commonly characterised in testbeams, either using charged particles or X-rays. Charged particles are used to quantify detector performance in terms of absolute efficiency, while X-rays can provide additional information about the detector structure. This paper presents an alternative approach to calculating charged particle efficiencies, using the results of an X-ray testbeam of the mini-MALTA CMOS prototype at Diamond Light Source, and additional laboratory measurements. Results are presented for an unirradiated and an irradiated sample and compared to the results of charged particle testbeams at SPS and ELSA. The extrapolated efficiencies are in agreement with the measured values. Additionally, the extrapolated efficiency maps provide more insight about the location of the pixel inefficiencies, due to the better spatial resolution of the X-ray testbeam.
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Aug 2020
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B16-Test Beamline
Detectors
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Abstract: One of the major limitations of XAS experiment at synchrotron facilities is the performance of the detectors. In order to be able to measure more challenging samples and to cope with the very high photon flux of the current and future (diffraction limited) sources technological developments of detectors are necessary. This paper reports on the construction and characterization of a monolithic nineteen channel germanium detector demonstrator fitted with CMOS preamplifiers. The detector was characterized in the lab with radioactive sources and with the X-ray synchrotron beam. Characteristics such as energy resolution, linearity, counting rate capabilities, and stability of the detector were thoroughly evaluated. In addition, it was proved that by using an advanced pulse processor such as Xspress4 it was possible to improve the performance of the detector system by eliminating the cross talk among channels and by suppressing the charge shared events. This work could pave the way to enhanced germanium fluorescence detectors for high throughput X-ray spectroscopy.
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Jun 2020
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Detectors
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Abstract: This work presents the design and development of a CdTe sensor, Medipix3RXv2 readout ASICs photocounting detector of 55 pm pixel size arranged in an arc modular distribution for its use in X-ray Pair Distribution Function (PDF) applications at the Diamond Light Source (DLS) synchrotron. This contribution highlights the concept and technical solutions adopted for this new detector which include the development of a fibre optic link between the detector head and the readout FPGA cards. This solution enables a considerable reduction in the weight and size of the detector head.
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Apr 2020
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B16-Test Beamline
Detectors
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Leonardo
Abbene
,
Fabio
Principato
,
Gaetano
Gerardi
,
Antonino
Buttacavoli
,
Donato
Cascio
,
Manuele
Bettelli
,
Nicola
Sarzi Amade
,
Paul
Seller
,
Matthew C.
Veale
,
Oliver
Fox
,
Kawal
Sawhney
,
Silvia
Zanettini
,
Elio
Tomarchio
,
Andrea
Zappettini
Diamond Proposal Number(s):
[20545]
Abstract: In this work, the spectroscopic performances of new cadmium–zinc–telluride (CZT) pixel detectors recently developed at IMEM-CNR of Parma (Italy) are presented. Sub-millimetre arrays with pixel pitch less than 500 µm, based on boron oxide encapsulated vertical Bridgman grown CZT crystals, were fabricated. Excellent room-temperature performance characterizes the detectors even at high-bias-voltage operation (9000 V cm−1), with energy resolutions (FWHM) of 4% (0.9 keV), 1.7% (1 keV) and 1.3% (1.6 keV) at 22.1, 59.5 and 122.1 keV, respectively. Charge-sharing investigations were performed with both uncollimated and collimated synchrotron X-ray beams with particular attention to the mitigation of the charge losses at the inter-pixel gap region. High-rate measurements demonstrated the absence of high-flux radiation-induced polarization phenomena up to 2 × 106 photons mm−2 s−1. These activities are in the framework of an international collaboration on the development of energy-resolved photon-counting systems for high-flux energy-resolved X-ray imaging.
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Mar 2020
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Detectors
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I.
Sedgwick
,
F.
Krivan
,
I.
Shevyakov
,
M.
Zimmer
,
H.
Graafsma
,
G.
Cautero
,
D.
Giuressi
,
R.
Menk
,
G.
Pinaroli
,
L.
Stebel
,
A.
Greer
,
N.
Guerrini
,
U.
Pedersen
,
N.
Tartoni
,
S. Y.
Rah
,
H. J.
Hyun
,
K. S.
Kim
,
S. H.
Kim
,
B.
Boitrelle
,
F
Orsini
,
B.
Marsh
,
T.
Nicholls
,
A.
Marras
,
C. B.
Wunderer
,
J.
Correa
,
S.
Lange
,
M.
Kuhn
Abstract: High brilliance synchrotrons and Free Electron Lasers (FELs) require high performing detector systems to realise their full potential. High dynamic range, low noise and high frame rate are all of great importance. In this paper we describe the P2M CMOS sensor, designed for soft X-ray detection at such facilities. We refer to previous work on test devices demonstrating a noise of <16e-, a full well capacity of >5Me- and quantum efficiency of >80% at 400eV (and with good sensitivity even below this value). Initial test results on the first Front Side Illuminated (FSI) 2 Megapixel device are also presented, and an outline of future work is described.
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Nov 2019
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Data acquisition
Detectors
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Open Access
Abstract: The increasing data throughput of modern detectors is a growing challenge for back-end data acquisition systems. OdinData provides a scalable framework for data acquisition used by multiple beamlines at Diamond Light Source (DLS). While it can be implemented standalone, OdinControl is used to provide a convenient interface to OdinData. Eiger detectors at DLS were initially integrated into the Odin framework specifically for the data acquisition capability, but the addition of detector control provides a more coherent and easily deployable system. OdinControl provides a generic HTTP API as a single point of control for various devices and applications. Adapters can abstract the low-level control of a detector into a consistent API, making it easier for high-level applications to support different types of detector. This paper sets out the design and development of Odin as a control system agnostic interface to integrate Eiger detectors into EPICS beamline control systems at DLS, as well as the current status of operation.
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Oct 2019
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Data acquisition
Detectors
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Open Access
Abstract: The Diamond Light Source data analysis infrastructure, Zocalo, is built on a messaging framework. Analysis tasks are processed by a scalable pool of workers running on cluster nodes. Results can be written to a common file system, sent to another worker for further downstream processing and/or streamed to a LIMS. Zocalo allows increased parallelization of computationally expensive tasks and makes the use of computational resources more efficient. The infrastructure is low-latency, fault-tolerant, and allows for highly dynamic data processing. Moving away from static workflows expressed in shell scripts we can easily re-trigger processing tasks in the event that an issue is found. It allows users to re-run tasks with additional input and ensures that automatically and manually triggered processing results are treated equally. Zocalo was originally conceived to cope with the additional demand on infrastructure by the introduction of Eiger detectors with up to 18 Mpixels and running at up to 560 Hz framerate on single crystal diffraction beamlines. We are now adapting Zocalo to manage processing tasks for ptychography, tomography, cryo-EM, and serial crystallography workloads.
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Oct 2019
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Detectors
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G. B.
Christian
,
M.
Abbott
,
T.
Cobb
,
C. A.
Colborne
,
A. M.
Cousins
,
P.
Garrick
,
T.
Trafford
,
I.
Uzun
,
Y.-m.
Abiven
,
J.
Bisou
,
F.
Langlois
,
G.
Renaud
,
G.
Thibaux
,
S.
Zhang
,
S. M.
Minolli
Open Access
Abstract: The PandABlocks framework comprises the FPGA logic, TCP server, webserver, boot sources and root filesystem, developed for the PandABox platform by Diamond Light Source and Synchrotron Soleil, for advanced beamline scanning applications. The PandABox platform uses a PicoZed System-on-Module, comprising a Zynq-7030 SoC, coupled to a carrier board containing removable position encoder modules, as well as various input and outputs. An FMC connector provides access to ADC/DACs or additional I/O, and gigabit transceivers on the Zynq allow communication with other systems via SFP modules. Specific functions and hardware resources are represented by functional blocks, which are run-time configurable and re-wireable courtesy of multiplexed data and control buses shared between all blocks. Recent changes to the PandABlocks framework are discussed which allow the auto-generation of the FPGA code and tcl automation scripts, using Python and the jinja2 templating engine, for any combination of functional blocks and SFP/FMC modules. The framework can target hardware platforms other than PandABox and could be deployed for other Zynq-based applications requiring on-the-fly reconfigurable logic.
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Oct 2019
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