We present a Cellular Neural Network (CNN) model in which cells are constituted by autonomous robots implementing some standard templates. The system can be interpreted as a multi-core processor ...acting on the robot environment, being each robot one of the cores. This is a particular case of robot swarm which benefits from the simplicity of the CNN template implementation.
This paper describes the implementation of a SPI-programmable clock delay chip based on a Delay Locked Loop (DLL) to be used in the upgrade of the data acquisition electronics of the upgrade of the ...LHCb calorimeters. in order to shift the phase of the clock (25 ns) in steps of 1ns, with a 55ps jitter and 21.5ps of delay line linearity. The delay lines will be integrated into ICECAL, the LHCb calorimeter front-end ASIC in the near future. The stringent noise requirements on the ASIC imply minimizing the noise contribution of digital components. This is accomplished by implementing the DLL in differential mode. To achieve the required radiation tolerance several techniques are applied: double guard rings between PMOS and NMOS transistors as well as glitch suppressors and TMR Registers. This 5.7 mm2 chip has been implemented in AMS CMOS 0.35um technology.
An integrated circuit for the Upgrade of the LHCb Calorimeter front end electronics is presented. The circuit is based on a current mode input stage followed by two fully differential interleaved ...channels with a switched integrator and a track and hold. The input stage employs a novel electronically cooled input termination scheme to achieve the stringent noise requirements. Compared to previous designs, its novelty relies in the use of two current feedback loops to decrease and control the input impedance of a common base stage. Two prototypes in AMS SiGe BiCMOS 0.35um technology have been designed and tested. Key measurements have been performed. Reflection coefficient is smaller than 0.5% for the full dynamic range, which is 12 bits. Relative linearity error is below 1%. Output noise is about 1 LSB after applying correlated double sampling.
Two solutions for the analog signal processing of a particle detector, the foreseen upgrade of the LHCb calorimeter, are presented. High precision measurements and low noise are required for a signal ...transmitted over 12 meter cables that spills over the following clock cycle. One solution, cast in an ASIC, uses an active termination over the cable transmission line and a dual channel integration scheme to solve the integrator discharge problem. The other solution modifies slightly the actual configuration using delay lines to reflect the signal from one clock cycle and subtract it from the next. It is implemented using commercial out-of-the-shelf components.
The LHCb experiment (The LHCb Technical Proposal, CERN/LHCC 98-4) is designed to study B meson physics in the LHC proton–proton collider at CERN. The Scintillator Pad Detector (SPD) has been designed ...to complete the calorimeter information performing an
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γ
identification for the experiment level-0 trigger system. The detection technology consists in transmitting scintillation light by means of both Wavelength Shifting and clear fibers to fast multi-anode photomultiplier tubes. In this paper, it is described the instrumentation and setup used to characterize the baseline photomultiplier solution (Hamamatsu R5900-00-M64) together with the scintillators and optical fibers for the SPD at LHCb.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
We describe a fully GPU-based implementation of the first level trigger for the upgrade of the LHCb detector, due to start data taking in 2021. We demonstrate that our implementation, named Allen, ...can process the 40 Tbit/s data rate of the upgraded LHCb detector and perform a wide variety of pattern recognition tasks. These include finding the trajectories of charged particles, finding proton-proton collision points, identifying particles as hadrons or muons, and finding the displaced decay vertices of long-lived particles. We further demonstrate that Allen can be implemented in around 500 scientific or consumer GPU cards, that it is not I/O bound, and can be operated at the full LHC collision rate of 30 MHz. Allen is the first complete high-throughput GPU trigger proposed for a HEP experiment.
Mass characterization of MaPMT tubes for the LHCb scintillator pad detector Graugés, Eugeni; Comerma, Albert; Garrido, Lluís ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
03/2007, Volume:
572, Issue:
1
Journal Article
Peer reviewed
The final choice as the photomultiplier solution for both the LHCb Pre-Shower (PS) and the Scintillator Pad Detector (SPD) are the R7600-00-M64MOD Hamamatsu 64 channel photomultiplier tubes (MaPMT). ...A total of 220 units have been purchased to the manufacturer and around 100 units, the part corresponding to the SPD, have been characterized at the photon detection test bench facility in the University of Barcelona (UB) high energy physics group laboratory. There, the crucial features of the tubes such as linearity, gain, channel cross-talk and anode uniformity of response have been measured to ensure the compliance with the specifications agreed with the manufacturer.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
In this paper we present a complete study on the balance between high performance image processing and low power consumption without using expensive components. Our proposal consists in implementing ...a Discrete Time Cellular Neural Network (DT-CNN) on a low power Actel IGLOO nano Field Programmable Gate Array (FPGA). This is a definitive step further from previous work to obtain an intelligent camera device for robots. Applications in Robot Guidance have rapidly increased in the last years as robots break in different fields of everyday live, which most of this robotic devices need sensors for navigation. Our proposed low cost solution avoids highly complex architectures, expensive smart sensors and low performance navigation systems.
High energy physics particle detectors are large and complex devices with very demanding requirements at the level of signal to noise ratios, processing times and data throughput. The first stages of ...the data acquisition are hardware based while the last ones depend rather on software. Among the solutions to the problems posed by the requirements we may find the use of multi-core processors or maybe GPU's. We shall review what are the points in which these techniques could be of use and the actual proposals.
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