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This document presents a transform-based approach to primary signal vertex finding feasibility analysis. An algorithm to find primary vertices has been developed using only Inner Detector measurements. Based on the information available to the algorithm, a metric has been developed to identify the signal vertex. The feasibility analysis demonstrates the theoretical distinguishability of different...
The Belle 2 experiment is undergoing an upgrade with the aim to perform the most precise measurement of the CP-violation using the state-of-the-art detectors. The silicon pixel detector is the innermost layer of the experiment. Because of the increased beam background and the high detection efficiency of the silicon pixel detector, the data rate of the detector is estimated at 22 GB/s which is 10...
In the framework of the construction of a novel Femtoscope Array for Correlation and Spectroscopy, named FARCOS, aiming at the identification in charge and mass even of particles stopping in the first detection layer, we are performing a thorough characterization of the silicon detector layers in terms of the collection properties as a function of the point of incidence. We have experimental evidence...
The upgrade of the LHCb experiment, planned for 2019, will transform the experiment in a trigger-less system reading out the full detector at the maximum 40 MHz event rate. This will enable the detector to run at instantaneous luminosities of 2×1033 cm−2s−1 and probe physics beyond the Standard Model in the heavy flavour sector with unprecedented precision. The Vertex Locator (VELO) is the silicon...
The Heavy Photon Search (HPS) is a new, dedicated experiment at Thomas Jefferson National Accelerator Facility (JLab) to search for a massive vector boson, the heavy photon (a.k.a. dark photon, A), in the mass range 20–500 MeV/c2 and with a weak coupling to ordinary matter. An A' can be radiated from an incoming electron as it interacts with a charged nucleus in the target, accessing a large open...
PET is the most sensitive imaging technique in the field of nuclear medicine. However, the singles count rate is typically 10 times higher than the coincidence count rate even for positron emitters. This means that there are a lot of pairs of undetected annihilation photons. For single gamma imaging, Compton imaging is known as the only method to obtain directional information of an incoming gamma...
In this work we present new developments of Silicon Drift Detectors (SDDs) and low noise CMOS read-out electronics for a possible use in different X-ray spectroscopy applications, from nuclear physics experiments, to detection systems at synchrotron light sources, to XRF (X-Ray Fluorescence) instrumentation. The detectors can be operated in different working conditions, from room temperature, avoiding...
The Associative Memory (AM) system of the Fast TracKer (FTK) processor has been designed to perform pattern matching using as input the data from the silicon tracker in the ATLAS experiment. The AM is the primary component of the FTK system and is designed using ASIC technology (the AM chip) to execute pattern matching with a high degree of parallelism. The FTK system finds track candidates at low...
This work presents a model describing the IV characteristics of SiPM detectors allowing to easily determine important physical parameters like breakdown voltage VBD and triggering probability PGeiger. The proposed model provides a good description of experimental data taken with SiPMs of different technologies (i.e. Hamamatsu HPK, KETEK) and geometries. Good agreement over a very wide range of current...
A keyword detection system with zero-resources techniques is presented. It consists of a primary alignment method and a later rescoring of its hipotheses. Both stages based on a segmental dynamic time warping method and a segmental model respectively. The resulting system is totally language independent and has no pre-segmentation or written resources requirements, being its only needed input information...
In this paper a method is presented to address the automatic testing of analog ICs. Based on Design-for-Testability building blocks offering extra controllability and extra observability, a test infrastructure is generated for a targeted circuit. The selection of the extra blocks and their insertion into the circuit is done automaticaly by a proposed optimization algorithm. Adopting a defect-oriented...
Opto-electrical characteristics of Si-based blocked-impurity-band (BIB) detector are investigated by combing experiment with simulation. The measured black-body response characteristics at different temperature are discussed. The simulated dark current characteristics with different thicknesses of blocking layer are also presented by taking into account impurity-band effects.
This paper presents a type of plasmonic circuit that is monolithically integrated with electronic devices on a silicon substrate and discusses the concept behind this circuit. Surface plasmon waveguides and detectors are integrated with metal-oxide-semiconductor field-effect transistors (MOSFETs) on the substrate. In the circuits, surface plasmon signals are generated by light at a wavelength at which...
In this paper, we introduce the very first ‘binary’ 3D feature descriptor, B-SHOT, for fast and efficient keypoint matching on 3D point clouds. We propose a binary quantization method that converts a real valued vector to a binary vector. We apply this method on a state-of-the-art 3D feature descriptor, SHOT [1], and create a new binary 3D feature descriptor. B-SHOT requires 32 times lesser memory...
A multiscale approach to modeling of accumulation of radiation defects in silicon alpha detectors applied in the associated particle imaging systems is developed. With this approach we calculated the dependencies of defect concentrations and leakage current on time in a detector which was irradiated by alpha particles with energy of 3.5 MeV.
We present a study of a cold-electron bolometer operating at 350 mK with a twin-slot antenna coupling radiation at 160 GHz. The detector's absorbing element consists of degenerately-doped strained silicon and has Schottky contacts to superconducting aluminium leads. These contacts allow for direct electron cooling of the absorber to below the phonon temperature, enabling the cold-electron bolometer...
Performance of terahertz THz field effect transistor (FET) direct detection rectifying detectors operating in the broadband detection regime taking into account some extrinsic parasitics and detector-antenna impedance matching is considered. Si metal oxide semiconductor FET (MOSFET) and GaAlN/GaN heterojunction FET (HFET) THz detectors in comparison with Schottky barrier diode (SBD) ones are discussed...
We report an integrated graphene photodetector on top of a silicon waveguide with a maximum responsivity of 0.36 A/W and a 3dB high-speed cut-off frequency of 42 GHz. Furthermore, nonlinear photocurrent in graphene under pulse excitation enables direct on-chip characterization of ultrafast pulses.
We demonstrate an integrated four quadrant detector in silicon for infrared light, based on integration of plasmonic splitting, focusing and plasmonic enhanced internal photoemission detection on a single silicon plasmonic chip.
This paper describes the design, fabrication, and test of a custom concentric PD array for spatially resolved diffuse reflectance (SRDR) measurements. To the best of our knowledge, this is the first reported compact, densely packed semiconductor SRDR probe.
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