1,721,042 research outputs found
Configurable Digital Multi-Channel Processor for Emulation and Elaboration of Radiation Events
No full textWe present a digital fully configurable architecture that performs the function of signal generation for emulation of radiation detectors and front-end electronics and the function of processor of signals from radiation detectors. The proposed architecture has been conceived to serve as a general purpose investigation instrument in digital spectroscopy applications, both at hardware and firmware level. It allows the emulation of all parts of an acquisition and processing setup and consequently implements a real and complete hardware and firmware co-design platform.
The system has been prototyped and is being fully tested
Dynamic Maximization of Filter Length in Digital Spectroscopy
No full textIn many modern applications based on detected radiation measurements, high rate and high resolution are more and more features of primary importance. In this scenario, it is well known that high resolution of measurements and high rate of pulses are conflicting issues, which implies a trade-off between live time of the system and precision of measurements. We propose a digital processing technique based on adaptive filters for maximizing both achievable resolution and sustainable rate
Digital System for Acquisition and Processing of Detected Images
No full textThe paper presents the digital electronic system for acquisition and processing of images from the detection stage of a compact and high resolution Anger camera to be used in clinical and research environments. Main features of the system are reconfigurability, linearity, low noise and processing data rate through hardware and firmware architecture solutions that also allow the system to operate in the presence of disturbances and electromagnetic noise, while at the same time minimizing the own radiated emissions
Implementation of USB 3.0 Bus Controller in FPGA for Data Transfer in Multi-Channel Applications
No full textIn this contribution, we present a USB 3.0 controller in FPGA that allows the connection of a PC to a FPGA-based digital detection system, providing a constant real transfer rate of 3 Gb/s. The controller maps in the PC memory all the registers of the system into the FPGA device. In this way, with simple instructions C++/vb.net the user can fully configure the system and get data from it. The controller has been physically realized and tested
A New Method for Time Measurements Based on a VCO with 14 ps FWHM Resolution
No full textThe precise measurement of time intervals is a
primary goal in a growing number of applications and the
challenge to achieve increasingly higher resolutions is a main topic of research. In this sense, time-of-flight measurements and time-correlated photon counting are two milestones. Since the intrinsic resolution of the sensors used today is in the order of tens of picoseconds, the measurement systems must guarantee performance at least of this order. The choice of making digital a
part or the totality of the measurement electronic systems
exploits well-known advantages from the adaptivity, to the
versatile calibration, to the easiness of implementation of
powerful processing algorithms, but also new methods must be put in place to significantly improve the resolution of the measurements. The well-established method for high-accuracy time interval measurements is the time-to-amplitude conversion (TAC). Another diffused method is the time-to-digital conversion (TDC), which has the advantage of easy integration. Methods based on phase measurements have also been proposed in literature. This work concerns a strategy of time measurement, with resolution of the order of few picoseconds, based on the
additional features of very limited analog hardware, easy
integrability in contexts where computation power is already present, no need of intensive calibration procedures, and minimizing the necessity of a-priori information
LHCb Particle Identification Upgrade: Technical Design Report
Full text linkThe LHCb upgrade will take place in the second long shutdown of the LHC, currently scheduled to begin in 2018. The upgrade will enable the experiment to run at luminosities of 2 x 10^33 cm^-2 s^-1 and will read out data at a rate of 40MHz into a exible software-based
trigger. All sub-detectors of LHCb will be re-designed to comply with these new operating conditions. This Technical Design Report presents the upgrade plans of the Ring Imaging Cherenkov (RICH) system, the calorimeter system and the muon system, which together provide the particle identication capabilities of the experiment
LHCb VELO Upgrade: Technical Design Report
Full text linkThe upgraded LHCb VELO silicon vertex detector is a lightweight hybrid pixel detector capable of 40 MHz readout at a luminosity of 2×10^33 cm^−2 s^−1. The track reconstruction speed and precision is enhanced relative to the current VELO detector even at the high occupancy conditions of the upgrade, due to the pixel geometry and a closest distance of approach to the LHC beams of just 5.1 mm for the first sensitive pixel. Cooling is provided by evaporative CO2 circulating in microchannel cooling substrates. The detector contains 41 million 55μ×55μ pixels, read out by the custom developed VeloPix front end ASIC. The detector will start operation together with the rest of the upgraded LHCb experiment after the LHC LS2 shutdown, currently scheduled to end in 2019. This Technical Design Report describes the upgraded VELO system, planned construction and installation, and gives an overview of the expected detector performanc
Hardware Emulation of Two-Dimensional Arrays of Detectors
No full textWe present a digital fully configurable instrument which performs the function of signal generator for the emulation of radiation detectors and front-end electronics of image acquisition systems. We propose an emulator with 64 independent channels with the capability to emulate an image which has been a-priori programmed. The image genera-tion faithfully emulates in real-time an acquisition array constituted by 64 detectors (either based on silicon or photomultipliers) which are exposed to a source spatially distribute
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