Conveners
Oral
- Christer Frรถjdh (MId Sweden University)
Oral
- Bernd Schmitt (Paul Scherrer Institut)
Oral
- Roelof de Vries (Malvern-PANalytical)
Oral
- Heinz Graafsma
Oral
- Ralf Hendrik Menk (Elettra Sincrotrone Trieste)
Oral
- Cinzia Da Via (University of Manchester)
- Cinzia Da Via (University of Manchester (GB))
Oral
- Renata Longo (UNIVERSITY OF TRIESTE & INFN)
Oral
- Seppo Nennonen
Oral
- Valeria Rosso (INFN and University of Pisa)
Oral
- Joaquim Marques Ferreira dos Santos (University of Coimbra)
Oral
- Wasi Faruqi (MRC Laboratory of Molecular Biology)
Oral: Concluding remarks
- There are no conveners in this block
The JUNGFRAU is a hybrid photon pixel detector developed at the Paul Scherrer Institut for free electron laser and synchrotron applications.
Each detector module consists of half a million pixels of $75 \; \mu \mathrm{m}$ pitch, arranged in $1024 \times 512$ arrays for a sensitive area of approximately $8\times4 \; \mathrm{cm}^2$. Eight $256 \times 256$ pixel ASICs are bump-bonded to a single...
The peak brilliance reached by today's Free-Electron Laser and Synchrotron light sources requires photon detectors matching their output intensity and other characteristics in order to fully realize the sources' potential. The Pixellated Energy Resolving CMOS Imager, Versatile And Large (Percival) is a dedicated soft X-ray imager developed for this purpose by a collaboration of DESY,...
We present the concept of a single-photon imager capable of detecting up to 10$^9$ photons per second with simultaneous measurement of position (<10ยตm resolution) and time (few tens of picosecond resolution) for each individual photon over an active area of 7 cm$^2$. The detector is based on a โhybridโ concept: a vacuum tube, with a transparent input window on which a suitable photocathode...
We investigate the response of the Timepix detector for measurements and characterization of mixed fields such as radiation environments found in ion beam radiotherapy, Earth upper atmosphere and outer space. Of interest is the detector resolving power in terms of particle-type (species) and spectral- (energy loss) response. For this purpose we performed tests and calibration of detection...
AGIPD (Adaptive Gain Integrating Pixel Detector) is a 2D hybrid pixel detector system designed and developed for the European XFEL (Eu.XFEL) [1]. At the Eu.XFEL photons will arrive in pulse trains every 100 ms (or at the fundamental repetition frequency of 10 Hz). Each pulse train consists of up to 2700 pulses that arrive within 600 ยตs (i.e. a bunch spacing of 222 ns, meaning 4.5 MHz frame...
Although planar silicon sensors are commonly used for X-ray detection, they currently cannot be used by single photon counters at low energies due to their electronic noise being too high. A 1 keV-photon for instance, creates less than 300 electron-hole pairs. In this case, single photon counting detectors would require a noise lower than 30 electrons, which is still unachievable, and are...
Analysis of the spatial distribution of elements in the heritage objects, using X-ray fluorescence (XRF) spectroscopy, has become a very important support for conservators in recent years. Elemental mapping offers possibility to study spatial distributions of pigments on the surface of artworks and in the hidden painting layers.
In this work we present progress in the design and performance...
Owing to their radiation hardness, 3D pixel sensors are the most promising option for the innermost layers of tracking detectors at the High Luminosity LHC (HL-LHC). This application requires very high hit-rate capabilities, increased pixel granularity, extreme radiation hardness, and low material budget. As a result, future 3D pixels will have all geometries significantly downscaled as...
In this presentation, we will report on the use of the MARS scanner equipped with the Cadmium Zinc Telluride (CZT) assembled Medipix3RX detector in Charge Summing Mode (CSM). We have looked at methods for optimising scanning protocols in a preclinical small animal spectral scanner that will translate to human scanning in the diagnostic energy range (20 โ 140 keV).
We have used a MARS small...
At DTU Space an early version of a 3D CZT drift strip detector prototype has successfully been developed and fabricated [1]. The design of the prototype detector (20 mm x 20 mm x 5 mm) is based on the CZT Drift Strip detector principle [2]. It contains 12 drift cells, each comprising one collecting anode strip with 4 drift strips, biased such that the electrons are focused and collected by the...
ADVAPIX is an energy dispersive hybrid pixel detector based on a semiconductor sensor (Si/CdTE/CZT/GaAS) and developed for X-ray spectral imaging (3-200 keV). The sensor is read out by the recently developed Timepix3 ASIC. Timepix3 is formed of 256 x 256 pixels with a pixel pitch of 55 ฮผm developed by the Medipix consortium. Each Timepix3 pixel is capable of recording simultaneous...
Abstract: The Detector Group of the Swiss Light Source (SLS) at the Paul-Scherrer-Institute (PSI) has a long history of developing detectors for the needs of synchrotron sources. The advent of XFELs (like SwissFEL, which is constructed at PSI) has triggered the development of low noise, charge-integrating detectors with a high dynamic range of up to 104 . 12.4 keV photons per pixel. This high...
We have been developing CdTe pixel detectors combined with an aluminum Schottky diode sensor and photon-counting ASICs [1-3]. The hybrid pixel detector was designed with a pixel size of 0.2 mm by 0.2 mm and an area of 19.0 mm by 20.0 mm or 38.2 mm by 40.2 mm. We have investigated Pt/CdTe/Al configuration by using high resistivity p-type single-crystal CdTe wafers of 750 ฮผm in thickness. The...
IBEX is a versatile readout ASIC developed at DECTRIS as successor of PILATUS and EIGER [1] that can be operated in electron collection mode to count the number of X-ray photons absorbed in pixelated CdTe sensors. Since it also implements multiple energy thresholds, it is very well suited for spectral applications at X-ray energies up to 160 keV. To quantify how well photons of different...
Hybrid pixel detectors using high-Z semiconductors can provide a combination of efficient hard X-ray detection, low noise, fast readout and additional features such as energy binning. This is particularly important for hard X-ray experiments at synchrotron beamlines, where the high brightness can allow fast time-resolved measurements or rapid scanning of a sample. LAMBDA [1] is a...
A novel halide scintillator with low hygroscopic nature, Cs2HfCl6 (CHC), reaching high light output of 54,000 photons/MeV and excellent energy resolution of 3.4% at 662 keV (FWHM) using a photo multiplier tube (PMT) was reported [1]. However, its decay is as long as around 4 ยตs. In order to accelerate the decay time, we investigated optical and scintillation properties of...
Detectors which are a valid choice for imaging applications are not necessarily a good choice for diffraction applications. The Chemistry Nobel Prize 2017 went to high-resolution imaging of biomolecules in solution by cryo Electron Microscopy (cryo-EM). Three major technology breakthroughs were celebrated: 1) Computation methods for data analysis; 2) Sample preparation and 3) understanding the...
It is advantageous to combine information about geometry and the inner structure of historical artifacts with information about the elemental composition of decorative layers (polychromy), typically covering historical wooden sculptures. X-ray computed tomography describing artifact structure is quite common and easy. Standard X-ray fluorescence (XRF) analysis of decorative layers is typically...
Particle counting detectors with Microchannel Plates (MCPs) have been successfully used in various applications ranging from astrophysical imaging, where incoming fluxes are relatively low, to synchrotron instrumentation and neutron imaging with input fluxes exceeding 10^8 cm^-2s^-1. Among the attractive capabilities of MCPs is their ability to convert an incoming particle into 10^3-10^7...
This presentation outlines several advances in cluster analysis for hybrid pixel detectors. Hybrid pixel detectors are used by NASA for the radiation monitoring in a variety of space applications and different missions โ namely deployment of several sensors on the International Space Station, as a sensor for radiobiology on the BioSentinel satellite and the radiation detector on the Orion...
Breast cancer is the main cause of tumor deaths in women. Early diagnosis of the disease is widely approved as being essential for effective treatment. An estimate of about 246,660 new breast cancer cases was done in 2017, and the death rate rises to about 40,450 in that year [1]. Due to these reasons, breast cancer diagnosis at the very early stage is important in order to reduce the...
X-ray phase contrast imaging provides a method to distinguish materials with similar density and effective atomic number, which otherwise would be difficult using conventional X-ray absorption [1]. In the recent decade, multiple methods have been developed to acquire X-ray phase contrast images using incoherent laboratory sources. One of these is the Double Masked Edge Illumination (DM-EI)...
Gaseous time projection chambers (TPC) is a very attractive detector technology for particle tracking. Efficient discrimination of the events through pattern recognition of the topology of primary ionisation tracks is a major motivation for such type of TPCs. High-pressure xenon (HPXe) time projection chambers (TPCs) gained increasing importance during the last years due to their application...
In view of the high luminosity phase of the LHC (HL-LHC) to start operation around 2026, a major upgrade of the ATLAS inner tracker system is in preparation. Thanks to their reduced power dissipation and high charge collection efficiency after irradiation, thin planar pixel modules are the baseline option to instrument all, but the innermost layer of the pixel system.
To optimise the sensor...
The inner detector of the present ATLAS detector has been designed and developed to function in the environment of the present Large Hadron Collider (LHC). At the next-generation tracking detector proposed for the High Luminosity LHC (HL-LHC), the so-called ATLAS Phase-II Upgrade, the particle densities and radiation levels will be higher by as much as a factor of ten. The new detectors must...
Detectors of Medipix/Timepix family are usable in a wide range of applications. The original purpose of an x-ray imagining was broadened to many areas, where mainly Timepix detectors became very often used as a powerful tool in a particle and an experimental physics. The latest member of this class โ the Timepix3 ASIC (read-out chip) โ allows measuring the Time-over-Threshold (ToT) and the...
ABSTRACT
Intense X-ray FEL beams allow research using experimental techniques: e.g. record chemical reactions on timescales previously not accessible (femto-second experiments), resolve atomic details of viruses and study new material structures. The European X-ray Free Electron Laser (XFEL.EU) is a research facility providing spatially coherent X-ray flashes in the energy range from...
This paper presents a design of a pixel readout circuit implementing an charge sharing compensation method based on an algorithm for asynchronous approximation of a center of gravity โ Cogito [1]. In contrary to the former published methods, developed by Medipix Colaboration [2] and C8P1 algorithm by AGH-Fermilab [3], which rely on analog properties of the observed signals, the presented...
Versatile pixel detector readout chips like the Timepix3[1] offer interesting features for various physics related applications. Since these fast chips record hit rates of up to 80 Mhits/s, available readout systems focus on ensuring data throughput at highest possible rates [2]. Typical data acquisition electronics for modern pixel detectors are therefore centred around field-programmable...
Integrated charge-sensitive preamplifiers suffer from a reduced available dynamic range respect to discrete-type equivalents. This is due to the limits on maximum supply voltages that modern scaled technologies can tolerate. In this work we present a low-noise low-power integrated charge-sensitive preamplifier (CSP) for solid-state detectors. This device is equipped with an integrated...
There is an increasing research interest in combining X-ray spectroscopy with imaging. The availability of full-field energy resolving detectors is enabling the use of true spectroscopic X-ray imaging techniques at small-scale X-ray microscopy facilities, such as the Ghent University Centre for X-ray Tomography (UGCT). At UGCT we operate the SLcam [1], a full-field hyperspectral camera...
This paper reports on the development and testing of analytical models for simulating the pileup effects on photon-processing detectors. With the Medipix3RX detector and other energy-resolving photon-counting detectors, pulse pileup distorts the measurement of the photon energy. This is particularly important in photon-processing detectors that use charge summing and inter-pixel communication...
Please see the attached file in the abstract.
The Timepix3 hybrid pixel detectorโs precise time resolution of 1.5625 ns is of particular interest for new beam instrumentation applications since it enables time-resolved bunch-by-bunch measurement of the beam [1]. A transverse beam profile monitor is currently under development for the CERN Proton Synchrotron (CPS) to provide non-destructive continuous measurements during a beam cycle. As...
The Large Pixel Detector (LPD) was in development since 2009 at the Rutherford Appleton Laboratory, Science and Technology Facilities Council in Oxford, UK, for the European XFEL. While smaller prototype systems existed much earlier[1], the first Megapixel LPD detector was delivered in early 2017 to the European XFEL and successfully went into operation at the Femtosecond X-ray Experiments...
The Langton Ultimate Cosmic ray Intensity Detector (LUCID) is a payload on the satellite TechDemoSat-1 (TDS-1), used to study the radiation environment in low Earth orbit. TDS-1, placed in a 635 km, 98.4ยฐ Sun-synchronous orbit, is a technology demonstration satellite developed by Surrey Satellite Technology Ltd as a platform for testing novel technologies from UK academia and industry. The...
The VZLUSAT-1 satellite, the first Czech CubeSat, was successfully launched on June 23, 2017, to a 510 km Sun-synchronous low-Earth orbit. It carries several scientific payloads [1] including a Timepix detector as focal plane imager for the X-Ray telescope onboard. The Timepix payload, already presented in [2], contributes significantly to the satellite data collection, with more than 20 000...
