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The Micro-Vertex-Detector (MVD) of the PANDA experiment has been studied and optimized making use of Monte Carlo simulations. A detailed geometry of active and passive components was implemented in the computing framework. This allows to perform an analysis of the geometrical coverage of the detector as well as of its material budget. The components of the MVD have been studied piece by piece and...
We have built and evaluated a gamma-ray imaging detector for PET and simultaneous PET-MRI with the goal of providing sub-mm spatial resolution in all 3 dimensions. It consists of a solid slab of LYSO coupled to arrays of silicon photomultipliers (SiPMs) on both sides. The design is relatively cost-effective because it requires minimal mechanical processing of the scintillator, and because the photosensors...
A 100 μm × 100 μm readout cell with a power consumption of 15 μW and optimized for 12 bits dynamic range is presented. This circuit has been developed to readout the hybrid pixel sensors for the Micro-Vertex Detector (MVD) of the PANDA experiment at GSI. The readout architecture is based on the Time-over-Threshold technique which allows to achieve low-power charge measurement with a high dynamic range...
A new concept of high granularity hadronic calorimeter using thin Glass Resistive Plate Chambers (GRPCs) as sensitive medium with embedded semi-digital readout electronics is under development within the CALICE collaboration. CALICE calorimeters are intended to be used in the future linear collider experiments. To validate this new concept a prototype of 1 m is being conceived. Several GRPCs as large...
Plasma Display Panels (PDP), the underlying engine of panel plasma television displays, are being investigated for their utility as radiation detectors called Plasma Panel Sensors (PPS). The PPS a novel variant of a micropattern radiation detector, is intended to be a fast, high resolution detector comprised of an array of plasma discharge cells operating in a hermetically sealed gas mixture. We report...
The Micro Pixel Chamber (μ-PIC) using resistive Kapton on the cathode electrodes was developed and tested. The cathode electrodes were covered with resistive foil. Discharge problems are expected to be reduced due to spontaneous electric field reduction around the electrodes only for large electron deposit. The first prototype of this detector was made and tested. The gas gain more than 6000 was observed.
In order to search for rare processes, all four Large Hadron Collider experiments have to use advanced triggering methods for selecting and recording the events of interest. For this reason the understanding and evaluation of the trigger performance is one of the most crucial parts of any physics analysis. This paper summarizes the status of some of the software projects in the ATLAS Collaboration...
Performance predictions and test thresholds for the task of detecting a gamma-ray source in background with a position-sensitive detector are often costly to compute empirically. The asymptotic distributions of test statistics for detecting a point-source in background give reasonable performance predictions in terms of the receiver operating characteristic curve (ROC) with less simulated or measured...
The Pixel Luminosity Telescope (PLT) is a dedicated luminosity monitor, presently under construction, for the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC). It measures the particle flux in three layers of pixel diamond detectors that are aligned precisely with respect to each other and the beam direction, utilizing simultaneously performed particle track position measurements...
The time-of-flight (TOF) wall of CBM is proposed to be assembled with MRPCs. In a relative high particle multiplicity situation (about 20kHz/cm2), multi-hit capability is one of the most demanding requirement of the detector. Crosstalk is an important reason for the deterioration the multi-hit capability of a detector. To reduce the crosstalk level, a kind of shielded long-strip two-end readout MRPC...
The RD51 collaboration was founded in April 2008 to coordinate and facilitate efforts for development of micropattern gaseous detectors (MPGDS). The 75 institutes from 25 countries bundle their effort, experience and resources to develop these emerging micropattern technologies. MPGDS are already employed in several nuclear and high-energy physics experiments, medical imaging instruments and photodetection...
Real time event reconstruction plays a fundamental role in High Energy Physics experiments. The CDF experiment at the Tevatron collider performs a fast online reconstruction of high-resolution tracks using the Silicon Vertex Trigger (SVT). We will describe the architecture, the performance and the impact on CDF physics program of a next generation online track fitter, the GigaFitter, developed to...
We have been studying scintillation properties of He/Xe, such as luminescence spectra, time profile and scintillation yield. Furthermore we have been measuring ionization yields and studying the scintillation mechanism. From the measurements of luminescence spectra, it became clear that the scintillation photons in He/Xe mixture were emitted in the wavelength region of 150-200 nm. The time profiles...
Monitored drift tube chambers are used as precision tracking detectors in the muon spectrometer of the ATLAS experiment at the LHC at CERN. These chambers provide a spatial resolution of 35 mm and a tracking efficiency of close to 100 % up to background rates of 0.5 kHz/cm2, the former being limited at higher rates mainly due to space charge effects and the latter due to the maximum drift time of...
In view of a possible extension of the forward CMS muon detector system and future LHC luminosity upgrades, Micro-Pattern Gas Detectors (MPGDs) are an appealing technology. They can simultaneously provide precision tracking and fast trigger information, as well as sufficiently fine segmentation to cope with high particle rates in the high-eta region at LHC and its future upgrades. We report on the...
Vertex detectors for High Energy Physics experiments require pixel detectors featuring high spatial resolution, very good signal to noise ratio and radiation hardness. A way to face new challenges of ATLAS/SLHC future hybrid pixel vertex detectors is to use the emerging 3-D Integrated Technologies. However, commercial offers of such technologies are only very few and the 3-D designer's choice is then...
At Kyoto University Research Reactor Institute(KURRI), we installed a Cyclotron-Based Epithermal Neutron Source(C-BENS) for Boron Neutron Capture Therapy(BNCT). C-BENS consists of a cyclotron accelerator that can provide a ~ 1000 μA, 30 MeV proton beam, a neutron production beryllium target and the moderator that can reduce the energy of fast neutrons to an effective energy range. C-BENS can provide...
Compton imaging is of interest in the fields of astrophysics, homeland security and nuclear medicine as it can provide high spatial resolution and detection efficiency even at high γ-ray energies. In this work, carried out under the auspices of a project of the Italian Space Agency, aimed to explore novel technologies for Compton architectures with high-efficiency and low background for the detection...
We present a novel concept of the SNM imaging system based on cosmic-ray muon tracking in coincidence with neutron/gamma detection. The cosmic-ray flux at sea level is about 1 muon/sq. cm/minute. It is composed of nearly equal numbers of μ+ and μ-. In previous work, we have demonstrated that these muons can be used to image nuclear threats in relatively short times by measuring their multiple scattering...
In this study, we experimentally investigated the detailed charge collection process in CdTe ERPC detectors that are operated inside a strong magnetic field for MRI-compatible SPECT imaging system. As one of the key objectives, we quantitatively assessed the effect of the Lorenz force on the migration of charge carriers and signal induced inside the detector bulk. During the study, the ERPC detectors...
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