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This work presents the development and implementation of an ionizing radiation detector based on a commercial off the shelf CMOS image sensor and a FPGA. The response of the system was tested in irradiations with gamma photons, beta and alpha particles using different configurations of the image sensor. Finally, we analyze the possible uses of such configurations in the discrimination of events produced...
The advancement and use of silicon photo multiplier (SiPM) technology has enabled portable devices for applications such as scintillation detection to be developed. The proposed analogue to digital converter (ADC) architecture and field programmable gate array (FPGA) system configuration advances on analogue signal processing methods, traditionally employed for gamma isotope identification applications...
Based on open-air gas-discharge counter developed pedestrian portal monitor can detect much smaller amounts of alpha-radioactive nuclides than the best of the currently used stationary radiation monitors on the basis of gamma-ray scintillation detectors.
Heavy hitter detection is an important task in many network security and traffic measurement applications. In this work, we implement a heavy hitter detection accelerator based on the Count-Min sketch algorithm inside the NetFPGA-10G OpenFlow switch. By using only a small amount of extra memory and logic resources, the OpenFlow switch is capable of detecting the heavy hitter flows accurately without...
This paper presents the design and test results of a low-power 10-bit multichannel analyzer (MCA) chip for radiation detection. A low-power and event driven charge sensitive front-end and analog-to-digital converter (ADC) are implemented together with a microcontroller on a single chip. This level of integration leads to a compact MCA that can process and build pulse height spectra when interfaced...
A level crossing, which is an intersection of an automobile and a railway is important for a railway operator. We have to consider the conveniences and availability for passer-by (pedestrians, vehicles, etc.), as well as the safety. Once a level crossing detects a failure, it makes/keeps warning according to its fail-safe philosophy and prevents passer-by from entering the train area. However, this...
Training requirements for the radiological/nuclear detection mission are described. (The PDF of this standard is available at no cost compliments of the Department of Homeland Security Domestic Nuclear Detection Office. http://standards.ieee.org/getN42/download/N42.37-2016.pdf)
In this paper, we develop a new structure to obtain Pulse Dual Slope Modulation (PDSM) signals for visible light communication with dimming control. The modulator architecture consists of the simple blocks, including a counter, a MUX, and a serial to parallel converter. Compared to the traditional PDSM architectures, our proposed architecture has significant advantages, including RAM bit utilization...
In recent years, the importance of location-based services and indoor positioning systems increased significantly for both, research and industry. Visual localization systems have the advantage of not depending on dedicated infrastructure and thus they are interesting for navigation within buildings. While there are already approaches which are using pre-recorded databases of reference images to obtain...
Microstrip electrodes have been fabricated and combined with one and five suspended 6Li foils positioned within a pressurized, gas-filled chamber to create a suspended foil microstrip neutron detector. This new detector offers a mechanically and electrically robust alternative to multi-wire proportional counters. Incident neutrons are converted into charged-particle reaction products that ionize the...
Currently the multichannel readout chip for GEM detectors with an asynchronous architecture is being developed. The readout channel includes a preamplifier with fast and slow CR-RC shapers, discriminator with a differential threshold setup circuit, a 6 bit SAR ADC (40 Msps rate, 1.5 mW power consumption), digital peak detector and block of the time stamp registration. The digital peak detector has...
The MEGII Timing Counter will measure the positron time of arrival with a resolution of 30 ps relying on two arrays of scintillator pixels read out by 6144 Silicon Photomultipliers (SiPMs) from AdvanSiD.
A novel region-based pixel digital architecture for latency buffering and trigger matching able to withstand extended trigger latencies and unprecedented data rates at the High-Luminosity LHC upgrade is presented. The architecture features above 99.5% efficiency at nominal 3 GHz/cm2 pixel hit rate and 1 MHz trigger rate with 12.5 μs trigger latency foreseen at HL-LHC. The overall inefficiency is dominated...
OVER the past two decades momentum resolving spectrometers have revolutionized electron and ion spectroscopy. Momentum spectroscopy has enabled a new class of experiments in both laser based ultrafast sciences, and x-ray spectroscopy [1]. The fundamental concept of these spectrometers is that the time-of-arrival (ToA) and position of each fragment is measured. From these data the momentum vector of...
The DSSC (DEPFET Sensor with Signal Compression) collaboration develops a hybrid pixelated X-Ray photon detector with 4.5 MHz frame rate and immediate amplitude digitization for experiments at the European XFEL. We present the first full format 14.9×14 mm2 F1 pixel readout ASIC for the DSSC detector. The readout architecture is specially adapted to the burst structure of the XFEL (bursts of 2880 pulses...
A new method using a stopped cosmic-ray beam for the calibration of an electro-magnetic calorimeter which consists of several hundreds of modules has been established. Cosmic muons stop in the calorimeter, and positrons (and electrons) from the muon decays with the maximum energy of 53 MeV are used for the energy calibration. These events could be identified as double pulses observed by a flash ADC...
The Energy-Resolved Neutron Imaging System RADEN, located at the J-PARC Materials and Life Science Experimental Facility in Japan, is the world's first dedicated high-intensity, short-pulsed neutron imaging beam line. To carry out energy-resolved neutron imging at RADEN, we use cutting-edge detector systems employing micropattern detectors and data acquisition systems based on Field Programmable Gate...
A new detector, real-time 90Sr counter, was developed with sensitivity to 90Sr and less sensitivity to 137Cs, 40K and Cosmic rays, based on Cherenkov radiation. The detector is a threshold type Cherenkov counter using silica aerogel with a refractive index less than 1.042. Since of the threshold energy of 1.31 MeV, the beta ray from 90Y can be identified. This detector would be applied for recovery...
A method is shown to estimate the position of a (single) radiation source fusing the data from a sodium iodide detector and a gyroscope while panning the detector. Based on geometry considerations, the search motion of a detector is modelled as angular panning and waving motions. Correlation of the sensor data stream from the an gyroscopical accelerometer with the count rate event data of the detector...
Two fourth-generation 3He replacement (HeRep Mk IV) detectors based on microstructured semiconductor neutron detector (MSND) technology have been fabricated and characterized against a 0.75-in diameter by 3.0-in long, 10-atm 3He neutron proportional counter. The HeRep Mk IV detectors have a 0.75-in by 0.75-in square form factor with one HeRep Mk IV measuring 3.1-in long and the other measuring 6.1-in...
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