Paul Seller
(Rutherford Appleton Laboratory)
14/09/2011, 09:00
Poster Presentation
A novel pixellated energy resolving x-ray detector is used in a combined energy dispersive and angular dispersive x-ray diffraction set-up enabling the acquisition of multiple scatter angles without the use of multi-collimation between the sample and the detector, using narrow beam geometry. A system with 20x20 pixels of 250x250μm pitch and Cadmium Telluride detector material is used to...
Dr
Kentaro Toh
(J-PARC center, Japan Atomic Energy Agency)
14/09/2011, 09:00
Poster Presentation
A median point calculating method was introduced to the wavelength-shifting-fibre based neutron image detector to increase the spatial resolution. The detector was originally developed for the neutron diffraction instrument, SENJU, at the Japan Proton Accelerator Research Complex J-PARC. The detector head was comprised of 64x2 of wavelength shifting fibres placed in x, and y directions each in...
Dr
Changwoo Seo
(Korea Electrotechnology Research Institue)
14/09/2011, 09:00
Poster Presentation
The Cone-Beam Computed Tomography (CBCT) system has been widely used for medical diagnostic and surgical application. However, the 3D reconstructed images in CBCT are significantly affected by a variety of vibrations of the operating gantry system.
In this work, the geometric calibration in our developing CBCT was performed and analyzed in order to solve these problems by using a high-speed...
Mr
Jamie Dormand
(University of Liverpool)
14/09/2011, 09:00
Poster Presentation
We present an approach of applying Pulse Shape Analysis to preamplifier charge pulses from a planar High Purity Germanium (HPGe) semiconductor γ-ray detector to improve interaction position resolution through depth. This leads to an improvement in the quality of images reconstructed by Compton camera systems that are comprised of such detectors. Algorithms that achieve this and recent...
Mr
Matthew Soman
(Open University)
14/09/2011, 09:00
Poster Presentation
When X-rays interact in the ‘field free’ region of a back illuminated Charge Coupled Device (CCD) they form clouds of electrons that diffuse outwards in a stochastic fashion. These electrons can diffuse into neighbouring pixels before being contained in the potential wells beneath the electrodes. This process leads to signal electrons from a single interaction event being spread across...
Ms
Samantha Colosimo
(University of Liverpool)
14/09/2011, 09:00
Poster Presentation
The Advanced GAmma Tracking Array, AGATA, is part of a new generation of highly segmented hyper-pure germanium (HPGe) gamma-ray detection arrays that are currently being developed for use at low-yield, high background radioactive ion beam facilities. AGATA aims to utilize gamma-ray tracking in order to add-back scattered gamma-rays that would be vetoed in arrays with a Compton suppression...
Mr
Malte Backhaus
(Universität Bonn, Physikalisches Institut)
14/09/2011, 09:00
Poster Presentation
on behalf of ATLAS IBL collaboration
For the ATLAS pixel detector, a fourth hybrid pixel detector layer known as Insertable B-Layer (IBL) is developed, which will be slid into the present pixel detector. Due to the very small distance to the interaction point of about 3.4 cm, the IBL will improve the track reconstruction and vertexing of the pixel detector. In order to handle the extreme...
Prof.
Anatoly Maltsev
(JINR)
14/09/2011, 09:00
Poster Presentation
The complex of distant noncontact diagnostic devices for the correlated measurements of key parameters and characteristics of fast electro-nuclear and transmutational processes (t = 1 mksec) in nuclear-energetic installation is presented.
Complex contains the detectors of the gamma-, X-ray- and infrared-radiations, which work in a real-time mode in the line from a computer.
Mr
Koichi Todoroki
(University of Tokyo)
14/09/2011, 09:00
Poster Presentation
ASACUSA will attempt to measure the A-dependence of the antiproton-nucleus annihilation cross sections for the first time in the energy region where it is expected to deviate significantly from the A^(2/3)-law established at higher energies, using CERN’s Antiproton Decelerator and ASACUSA’s radio-frequency quadrupole decelerator, the combination of which provides 100-ns-long pulses each...
Dr
Haris Kudrolli
(Radiation Monitoring Devices)
14/09/2011, 09:00
Poster Presentation
Technological innovations in grazing incidence X-ray optics have been crucial to the advancement of the field of X-ray astronomy. These X-ray focusing optics are capable of improving the sensitivity of X-ray telescopes operating in the energy range above 10 keV by orders of magnitude. Full characterization of the X-ray optics includes measurement of the point spread function, scattering, and...
Dr
Takeshi Nakamori
(Waseda University)
14/09/2011, 09:00
Poster Presentation
It is important to obtain wide band X-ray/gamma-ray spectra at the same time in order to probe efficiently the emission processes or the structures of transient object such as gamma-ray bursts. We have developed, for future missions, an X-ray/gamma-ray detector utilizing reach-trough type avalanche photodiode (APD) array (8- and 16-segments) with the area of 1.6x1.8 cm^2. Excellent uniformity...
Mr
James Tutt
(The Open University)
14/09/2011, 09:00
Poster Presentation
EM-CCDs are commonly used for the detection of optical light, but seldom for X-ray detection partially due to the high energy and large charge packets that are generated at these energies. Through the analysis of high energy X-ray events it has been possible to show that the noise generated by the stochastic nature of the gain multiplication process in EM-CCDs can be minimised by operating at...
Carlo Fiorini
(Politecnico di Milano and INFN sez MI, Italy)
14/09/2011, 09:00
Poster Presentation
We present the analog front-end for the readout of non-linear DEPFET pixels designed in the framework of the European X-ray Free Electron Laser (XFEL). The facility is under construction in Hamburg (Germany). The proposed electronics is developed to be implemented in a 1-Megapixel X-ray detector system with single photon resolution at 1keV operating at a maximum frame-rate of 4.5MHz.
Due to...
Dr
Kentaro Toh
(Japan Atomic Energy Agency)
14/09/2011, 09:00
Poster Presentation
Some neutron scattering experiments performed at high-intensity pulsed neutron facilities located in Japan, the United States, and the United Kingdom require advanced two-dimensional neutron detectors that have features such as a short response time, good spatial resolution, and high detection efficiency. To this end, we are currently developing a two-dimensional position-sensitive neutron...
Mr
Takamasa Miura
(Waseda University)
14/09/2011, 09:00
Poster Presentation
The performance of a large-area, monolithic Hamamatsu Multi-Pixel Photon Counter(MPPC) was tested consisting of a 2x2 array of 3x3 mm2 pixels. MPPC is a novel type of semiconductor photodetector comprising multiple avalanche photodiode (APD) pixels operated in Geiger mode. Despite its great advantage of signal multiplication comparable to that achieved with the photomultiplier tube (PMT), the...
Prof.
Victor Samedov
(National Research Nuclear University (Moscow Engineering Physics Institute))
14/09/2011, 09:00
Poster Presentation
In order to locate particle position, it is necessary to have several signals of spaced detectors, since the amplitudes of these signals depend on the particle interaction point. For all position sensitive detectors the crucial characteristic for using as tracking or imaging detector is the accuracy of coordinate determination. The position resolution is closely connected not only with the...
Dr
Brad Cann
(University of Leicester), Dr
Lapington Jon
(University of Leicester), Mr
Virgil Taillandier
(University of Leicester)
14/09/2011, 09:00
Poster Presentation
The requirement to accurately detect and image very high speed photon events is crucial for many applications across a range of disciplines. Photon imaging detectors often make use of the planar geometry of MCP’s for high resolution imaging. However, the inherent rate limitations of MCP’s provide opportunities for discrete dynode devices where rapid recharge times and high throughput are...
Dr
Dominic Duxbury
(Science and Technnology Facilities Council, RAL)
14/09/2011, 09:00
Poster Presentation
Over the last few years several investigations have been undertaken to ascertain the suitability of gaseous electron multipliers (GEMs) for use as a neutron detector on the ISIS spallation neutron source. Our initial investigations focussed purely on whether these devices could be operated at the elevated pressure of 3He and CF4 necessary for 1mm position location (2.6 bars of CF4). In fact we...
Mr
Anthony Evagora
(The Open University)
14/09/2011, 09:00
Poster Presentation
The pre-amplifier, multi-stage, charge multiplication process used in the Electron Multiplying CCD (EMCCD) is subject to an ageing effect in which the gain achieved at particular avalanche potentials, decreases during operation. To utilise these devices for both space and terrestrial applications where recalibration of the gain is not feasible a comprehensive understanding of the ageing...
Dr
Konstantin Toms
(University of New Mexico)
14/09/2011, 09:00
Detectors for High Radiation and Extreme Environments
Poster Presentation
We describe the implementation of radiation damage monitoring using leakage current measurement of the silicon pixel sensors provided by the circuits of the ATLAS Pixel Detector high voltage delivery system. The dependence of the leakage current upon the integrated luminosity for several temperature scenarios is presented. Based on the analysis we have determined the sensitivity...
Dr
Elena Verbitskaya
(Ioffe Physical Technical Inst. RAS)
14/09/2011, 09:00
Poster Presentation
Recent results on the collected charge Qc in heavily irradiated Si detectors developed by RD50 collaboration for SuperLHC showed a significant Qc enhancement if detectors were operated at the bias voltage beyond 1000 V. Our investigations showed that this enhancement arises from a fundamental effect of carrier avalanche multiplication in high electric field of n+-p junction. The goal of the...
Mr
Bo Kyung Cha
(KERI), Mr
Dae Hee Lee
(KAIST), Mr
Dong-uk Kang
(KAIST), Mr
Hyunjun Yoo
(KAIST), Mr
Jun Hyung Bae
(KAIST), Mr
Minsik Cho
(KAIST)
14/09/2011, 09:00
Poster Presentation
Recently, CMOS Image Sensors (CIS’s) are becoming candidate solution for digital mammography (DM) systems due to relatively low cost, high speed and possibility to integrate signal processing electronics. Therefore, it is very important to optimize the performance of the CMOS-based photodiode combined with the scintillator for DM. In this research, we compared the performance of four different...
Mr
Thomas Conneely
(University of Leicester and Photek LTD)
14/09/2011, 09:00
Novel Photon Detection Systems
Poster Presentation
The requirements of high energy, high luminosity particle accelerators, particularly the Large Hadron Collider at CERN, has driven the development of a range of Application Specific Integrated Circuits (ASICs) able to cope with extremely high event rates and data throughput, while maintaining picosecond timing resolution in the region of 10-100 ps incorporated in a high channel density design....
Mr
Tobias Wittig
(TU Dortmund)
14/09/2011, 09:00
Detectors for High Radiation and Extreme Environments
Poster Presentation
The pixel detector is the innermost tracking detector of ATLAS which requires hermeticity to achieve superb track reconstruction performance. The current planar n-type sensors feature an active pixel matrix of n+ implantation and, so called, guard rings on the opposite p-side to reduce the high voltage stepwise. Because of the inactive safety margin around the active area, the sensor modules...
Ms
Anna Soter
(Max Planck Institute of Quantum Optics, Germany)
14/09/2011, 09:00
Poster Presentation
The ASACUSA experiment at CERN is now constructing 530-channel position-sensitive scintillation detectors and its FPGA-based readout electronics to measure and track high rates of charged pions emerging from antiproton annihilations in a future radiofrequency Paul trap for antiprotons. Each channel is read out by a wavelength shifting (WLS) fiber and 1600-pixel silicon photomultiplier (MPPC)....
Mr
André Rummler
(TU Dortmund)
14/09/2011, 09:00
Poster Presentation
ATLAS plans two major upgrades of its pixel detector on the path to HLLHC: First, the insertion of a 4th pixel layer (Insertable B-Layer, IBL) is currently being prepared for 2013. This will enable the ATLAS tracker to cope with an increase of LHC's peak luminosity to about 3E34 cm^-2 s^-1 which requires a radiation hardness of the sensors of up to 5E15 n_eq cm^-2. Towards the end of this...
Dr
Alexander Dierlamm
(Inst. fuer Experimentelle Kernphysik, KIT)
14/09/2011, 09:00
Poster Presentation
CMS started a campaign to identify the future silicon sensor technology baseline for a new Tracker for the high-luminosity phase of LHC. We ordered a large variety of 6” wafers in different thicknesses and technologies at HPK. Thicknesses ranging from 50µm to 300µm are explored on floatzone, magnetic Czochralski and epitaxial material both in n-in-p and p-in-n versions. P-stop and p-spray are...
Xerviar Omeime Esebamen
(Mid Sweden University)
14/09/2011, 09:00
Poster Presentation
There is an ever growing need for highly effective electron detectors with high responsivity. One of the parameters that has been shown to have a negative influence on the responsivity of a radiation detector is the surface recombination velocities of minority carriers at the Si-SiO2 interface. With the n+p detector discovered to possess better responsivity than a p+n detector at any given...
Dr
Hideshi Yamagishi
(Japan Atomic Energy Agency)
14/09/2011, 09:00
Poster Presentation
Two-dimensional gas-based neutron detectors having a fast response time and high spatial resolution are required for some neutron scattering experiments performed using a high-intensity spallation neutron source at the Materials and Life Science Experimental Facility at J-PARC. We are currently developing a multiwire-type two-dimensional neutron detector system for use in such scattering...
Ms
Rachel Cross
(University of Wales, Aberystwyth)
14/09/2011, 09:00
Advances in Pixel Detectors
Poster Presentation
A one dimensional electron counting detector array for electron spectroscopy applications is presented. The array uses a microchannel plate in conjunction with a custom ASIC.
The detector assembly is fitted at the focal plane of the CLAM4 hemispherical energy analyser and enables imaging across the width of the focal plane. The electron energy analyser is built into a system specifically...
Dr
Masaki Hori
(Max-Planck Institute for Quantum Optics)
14/09/2011, 09:00
Poster Presentation
The Linac4, now being constructed at CERN, will provide 160-MeV H- beams of high intensity of 2x10^14 ions/s. Some sequences of 500-ps-long micro-bunches must be removed from the beam using a chopper before the H- ions can be further accelerated in the Proton Synchrotron. We developed a monitor to measure the time structure and spatial profile of this high-intensity chopped beam, with...
Ms
Paz García de Acilu
(CIEMAT)
14/09/2011, 09:00
Poster Presentation
We are developing a PET insert for existing MRI equipment to be used in clinical PET/MR studies of the human brain. The proposed scanner is based on annihilation gamma detection with monolithic blocks of cerium-doped lutetium yttrium orthosilicate (LYSO:Ce) coupled to magnetically-compatible APD matrices. The light distribution generated on the LYSO:Ce block provides the impinging position of...
Bo Kyung Cha
(KERI)
14/09/2011, 09:00
Poster Presentation
In the last decade, digital X-ray imaging detectors using CCD arrays, CMOS and amorphous silicon flat panel (a-Si:H) in combination with various scintillation screens have been widely used for medical and industrial applications. The conventional scintillators such as thallium-doped cesium iodide (CsI:Tl) and terbium-doped gadolinium oxysulphide(Gd2O2S:Tb) and europium-doped gadolinium...
Dr
Fernando Amaro
(GIAN, Physics Dept., Coimbra University, Portugal)
14/09/2011, 09:00
Poster Presentation
One of the challenges of modern Time Projection Chambers (TPC) is to prevent the re-injection of the secondary ions produced on the gas amplification layer into the sensitive volume of the detector. Particularly in high multiplicity TPC the presence of positive ions has the potential to affect the tracking properties of the detector due to space charge effects.
The use of the secondary...
