A5024699625- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Radiation Effects in Electronics
- CCD and CMOS Imaging Sensors
- Particle physics theoretical and experimental studies
- Advancements in PLL and VCO Technologies
- Wireless Sensor Networks for Data Analysis
- Atomic and Subatomic Physics Research
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Semiconductor Lasers and Optical Devices
- Advanced Wireless Communication Techniques
- Photonic and Optical Devices
- Cellular Automata and Applications
- Network Time Synchronization Technologies
- Medical Imaging Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Error Correcting Code Techniques
- Electrostatic Discharge in Electronics
- Power Line Communications and Noise
- Coding theory and cryptography
- Gamma-ray bursts and supernovae
- Radiation Therapy and Dosimetry
- VLSI and Analog Circuit Testing
- Optical Wireless Communication Technologies
University of West Bohemia
2014-2025
The TOTEM experiment has made a precise measurement of the elastic proton-proton differential cross-section at centre-of-mass energy sqrt(s) = 8 TeV based on high-statistics data sample obtained with beta* 90 optics. Both statistical and systematic uncertainties remain below 1%, except for t-independent contribution from overall normalisation. This unprecedented precision allows to exclude purely exponential in range four-momentum transfer squared 0.027 < |t| 0.2 GeV^2 significance greater...
The TOTEM experiment at the CERN LHC has measured elastic proton-proton scattering centre-of-mass energy $\sqrt{s}$ = 8 TeV and four-momentum transfers squared, |t|, from 6 x $10^{-4}$ GeV$^2$ to 0.2 GeV$^2$. Near lower end of |t|-interval differential cross-section is sensitive interference between hadronic electromagnetic amplitudes. This article presents measurement constraints it imposes on functional forms modulus phase amplitude. data exclude traditional Simplified West Yennie formula...
Timepix3 detectors are the latest generation of hybrid active pixel Medipix/Timepix family. Such consist an sensor layer which is connected to readout ASIC (application specific integrated circuit), segmenting detector into a square matrix 256 $$\times $$ pixels (pixel pitch 55 $$\upmu m). Particles interacting in material create charge carriers, drift towards pixelated electrode, where they collected. In each pixel, time interaction (time resolution 1.56 ns) and amount created carriers...
The Timepix3—the latest generation of hybrid particle pixel detectors Medipix family—yields a lot new possibilities, i.e. high hit-rate, time resolution 1.56 ns, event data-driven readout mode, and the capability measuring Time-over-Threshold (ToT - energy) Time-of-Arrival (ToA) simultaneously. This paper introduces newly developed device for Timepix3, called "Katherine", featuring Gigabit Ethernet interface. primary benefit Katherine is operation Timepix3 at long distance (up to 100 m) from...
We present the characterization of a highly segmented “large area” hybrid pixel detector (Timepix3, 512 × pixels, pitch 55 µm) for application in space experiments. demonstrate that nominal power consumption 6 W can be reduced by changing settings Timepix3 analog front-end and reducing matrix clock frequency (from 40 MHz to 5 MHz) 2 (in best case). then comprehensive study impact these changes on particle tracking performance, energy resolution time stamping precision utilizing data measured...
This work presents a novel readout system for the Timepix3-based detector, designed specifically large-scale facilities, such as particle accelerators. The authors begin by outlining challenges associated with utilizing Timepix3 detector over long distances. paper proposes solution to these and describes its practical implementation. Beam test results are provided demonstrate system’s performance, particular focus on time-of-flight measurements. Additionally, address complexities of...
This paper describes the design and performance of timing detector developed by TOTEM Collaboration for Roman Pots (RPs) to measure Time-Of-Flight (TOF) protons produced in central diffractive interactions at LHC . The measurement TOF allows determination longitudinal position proton interaction vertex its association with one vertices reconstructed CMS detectors. is based on single crystal Chemical Vapor Deposition (scCVD) diamond plates designed about 50 ps time precision. upgrade...
We describe the technical design and show results of first measurements a network based on Timepix3 Katherine readout (with Gigabit Ethernet interface) installed in ATLAS cavern LHC January 2018. The consists four detectors, arranged two two-layer telescopes. All detectors are synchronized with each other orbit clock. solution concept project described details. Since radiation field inside is rather harsh, only detector units (sensors power supplies) system placed cavern. connected to...
The Timepix3 readout chip—the latest member of the Medipix family hybrid pixel detectors—brought several new functionalities in comparison with older Timepix, i.e. a high hit-rate, time granularity 1.5625 ns, data-driven scheme (with per dead approximately 475 ns), and capability measuring Time-over-Threshold (ToT) Time-of-Arrival (ToA) each at same time. However, power consumption standard setting prevents its use applications limited budget. Moreover, poses risk overheating sensor so that...
Abstract We characterize a novel instrument designed for radiation field decomposition and particle trajectory reconstruction application in harsh environments. The device consists of two Timepix3 assemblies with 500 µm thick silicon sensors face-to-face geometry. These detectors are interleaved set neutron converters: 6 LiF thermal neutrons, polyethylene (PE) fast neutrons above 1 MeV, PE an additional aluminum recoil proton filter ∼4 MeV. Application the coincidence anticoincidence...
In the presented work, we demonstrate how Timepix3 detectors, featuring Katherine (Gigabit Ethernet interface) readout, can be used in a particle telescope. For highly precise timestamp synchronization, special timing unit (with time resolution ∼ 13 ps) based on Time-to-Digital-Converter (TDC) is and interconnected with readouts. The designed concept of measurement chain was tested at SPS facilities CERN 40 GeV/c pion beam using telescope 3 synchronized detectors. Evaluating spatially...
The capability of Timepix3 detectors installed in ATLAS to measure luminosity is evaluated. It described how noisy pixels are identified and excluded. Two different methods for determination, i.e. cluster counting thermal neutron compared with each other. achieved short-term relative precision both determined by modeling the curve. shown that using a < 0.5 % can be 60 s time intervals. For neutrons, (for intervals) ≈ 2 was found. Hereby statistics limiting factor. findings discussed view...
One of the most significant current discussions in error correction coding is on replacement state-of-the-art codes by new innovative solutions. We propose a scalable parallel FPGA architecture for LDPC decoding. Regular and irregular are supported presented architecture. The can be easily utilized hardware applications. performance synthetized decoders presented.
This paper introduces a readout system for the Timepix2. Firstly, this chip is described and modes are discussed in detail. The new presented based on Gigabit Ethernet interface implements pre-processing, i.e. decoding of raw pixel data, directly hardware. device suppresses zero pixels, so that only useful data sent to computer/server. In special independent mode, can send completed files remote server via SSH does not need use control software. island stores measured local storage (SD...
The performance and response of a Timepix3 detector with 500 μm thick GaAs:Cr sensor layer was investigated in different radiation fields. resistivity ρ ≈ 109 Ω cm. Fitting modified Hecht functions, which take the small pixel effect into account, mobility-lifetime products μeτe = (0.773 ± 0.018) × 10−4 cm2V−1 (0.996 0.056) were determined. Hereby, latter value is favored due to better agreement fit data. In measurement 40 GeV/c pion beam, drift times charge collection efficiencies studied as...
The response of a Timepix3 detector (256 × 256 pixels, pixel pitch 55 μm) with 300 μm thick silicon sensor was studied in relativistic charged particle beams at the Super-Proton-Synchrotron CERN . irradiated different angles 400 GeV/c primary proton beam and mixed created by 330 Pb hitting beryllium target. We present discuss energy deposition spectra track features for particles stopping power. data shows that relative resolution approximately 9 % can be achieved. Analysis deposited tracks...
We present a newly developed modular and multiplatform acquisition control package dedicated for high performance Timepix3 pixel detector. The software was originally operation at ATLAS experiment. Afterwards, it further extended as an independent general purpose measurements online visualization with Timepix3. detector is semiconductor of 256×256 square pixels providing information about energy time arrival resolution less than 2 ns, which generate amount data to be processed in real the...
The paper describes the read-out control system for high resolution time-to-digital converter (TDC). used TDC is mentioned with its parameters. block diagram of shown and blocks are described. measurements presented in different set-ups, which described corresponding chapters. results taken from discussed.
The paper describes a compact system for detecting Single Event Effects (SEE) in semiconductor components. SEE is caused by hit into electronic chip with an energetic particle. can cause unexpected behaviour of the system. tested component called Device Under Test (DUT). structure shown and used components are described their main tasks. Some results running shown.
Abstract New developments of pixel detectors based on GaAs sensors offer effective registration the transition radiation (TR) X-rays and perform simultaneous measurements their energies emission angles. This unique feature opens new possibilities for particle identification basis maximum available information about generated TR photons. Results studies energy-angular distributions using a 500 |j.m thick sensor attached to Timepix3 chip are presented. Measurements, analysis techniques...
The paper describes possibility of time measurement in FPGA with very high resolution. There are described methods to obtain the Block diagram design which is implemented shown. Simulations and measurements mentioned prove
The paper is concerned with digital modulations design using an Altera programmable device. binary phase shift keying (BPSK) modulator and the BPSK demodulator are designed. A simulation on proposed performed implemented in implementation including effect of transmission channel. Measurements results discussed.