A5105820625- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Cosmology and Gravitation Theories
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- advanced mathematical theories
- Radiation Effects in Electronics
- Advanced Data Storage Technologies
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- Parallel Computing and Optimization Techniques
- Embedded Systems and FPGA Design
- Embedded Systems Design Techniques
- Low-power high-performance VLSI design
- Logic, programming, and type systems
- Structural Analysis of Composite Materials
- Superconducting Materials and Applications
- CCD and CMOS Imaging Sensors
Stockholm University
2015-2025
Government of Catalonia
2024
A. Alikhanyan National Laboratory
2024
Atlas Scientific (United States)
2024
The University of Adelaide
2017-2023
Uppsala University
2014
AlbaNova
2006-2012
European Organization for Nuclear Research
2009
Johannes Gutenberg University Mainz
2000
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
The ATLAS Level-1 Calorimeter Trigger uses reduced-granularity information from all the calorimeters to search for high transverse-energy electrons, photons, τ leptons and jets, as well missing total transverse energy. calorimeter trigger electronics has a fixed latency of about 1 μs, using programmable custom-built digital electronics. This paper describes hardware, installed in cavern.
Abstract The NNBAR experiment for the European Spallation Source will search free neutrons converting to antineutrons with a sensitivity improvement of three orders magnitude compared last such search. This paper describes progress towards conceptual design report NNBAR. moderator, neutron reflector, beamline, shielding and annihilation detector is reported. simulations used form part model which be optimisation quantification its sensitivity.
A key aim of the HighNESS project for European Spallation Source is to enable cutting-edge particle physics experiments. This volume presents a conceptual design report NNBAR experiment. would exploit new cold lower moderator make first search in over thirty years free neutrons converting anti-neutrons. The observation such baryon-number-violating signature be fundamental significance and tackle open questions modern physics, including origin matter-antimatter asymmetry. shows beamline,...
The goal of the HIBEAM/NNBAR program is to search for baryon number violation via conversion or oscillation neutrons into sterile and/or antineutrons at European Spallation Source. A key experimental component construction an annihilation detector directly observe production antineutron following oscillation. Design studies are presented. predicted response models studied using Geant4 simulations made with Monte Carlo signal topology and cosmic ray backgrounds. Particle identification...
The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world’s most powerful pulsed neutron source. Supported by 3 million Euro Research and Innovation Action within EU Horizon 2020 program, design study (HighNESS) has been develop second source located below spallation target. Compared first source, designed for high cold thermal brightness, new optimized...
As experimental collaborations become larger and more international, there is a growing need for webbased tools that can allow collaborators to securely reliably monitor control their respective systems both on-site remotely from home institutes. Increased adoption of mobile devices such as smart phones tablets also opens new possibilities system monitoring, including push technologies send notifications about important events or error conditions. We present based on state-of-the-art clients...
The HIBEAM/NNBAR experiment is a free-neutron search for $n \rightarrow$ sterile $n$ and \rightarrow \bar{n}$ oscillations planned to be installed at the European Spallation Source under construction in Lund, Sweden. A key component detector identify $n-\bar{n}$ annihilation events, which will produce on average four pions with final state invariant mass of two nucleons, around $1.9\,$GeV. beamline are shielded from magnetic fields would suppress transitions, thus no momentum measurement...
The NNBAR experiment for the European Spallation Source will search free neutrons converting to antineutrons with an expected sensitivity improvement of three orders magnitude compared last such search. This paper describes both simulations a key component experiment, neutron optical reflector and gains in sensitivity.
We have developed a multipurpose experimental control and data acquisition system designed for rapid prototyping of small educational experiments. The has been with an emphasis on low cost, flexibility, simplification software firmware design minimal time to experiment. Software command-line html-based readout interfaces, as well TCP/IP server communicating LabVIEW. A standard Linux kernel open-source development tools simplifies development. common VHDL framework containing interface the...
Developments in networked embedded system technologies and programmable logic are making it possible to design new, highly flexible data acquisition (DAQ) architectures. We present a DAQ architecture where the software resources required by units acquired from server dynamically, be stored executed local memory. When unit needs call an operation not contained its memory, new is requested server, while occupied operations that have been used recently released make space for it. In this way...
Developments in networked embedded system technologies and programmable logic are making it possible to design new, highly flexible data acquisition (DAS) architectures. We present a DAS architecture where the software resources required by (DAQ) units acquired from server dynamically, be stored executed local memory. When DAQ unit needs call an operation not contained its memory, new is requested server, while occupied operations that have been used recently released make space for it. In...
The Daughterboard (DB) is the read-out link and control board that interfaces on- off-detector electronics for High-Luminosity Large Hadron Collider (HL-LHC) of ATLAS Tile Calorimeter (TileCal). DB sends high-speed digitized Photomultiplier (PMT)samples, while receiving distributing configuration, LHC timing. A redundant design based on Xilinx Soft Error Mitigation (SEM), Triple Mode Redundancy (TMR), Forward Correction (FEC) CRC Cyclic Check (CRC) strategies minimizes single failure points...
We present a full client for control and monitoring using asynchronous JavaScript XML (AJAX), new technology dynamic interactive web based clients. Distributed data acquisition (DAQ) systems can contain significant number of nodes. The location nodes on the front end system are usually determined during design phase, while clients change both in physical life system. It is also desirable to be easily modifiable needs. Software installation maintenance such large distributed quickly become...
When using segmented Ge-detectors for gamma ray tracking it is necessary to determine the segment pulse shapes with high accuracy. A high-speed data acquisition system many channels, precision and sampling rate required. There are also other applications such a system. Our uses performance FPGAs (Xilinx Virtex-V [2]) cope rates delivered by speed ADC chosen (Atmel 2Gsps, 10 bits) make all processing onboard in real time. Each board contains four ADCs, which can either handle channels up full...
We have developed an updated Daughterboard design for control and readout of the upgraded ATLAS Hadronic Tile Calorimeter electronics HL-LHC. In new design, four SFP+ modules handle: 9.6 Gbps uplinks operated by two Kintex Ultrascale+ FPGAs, 4.8 downlinks GBTxs. The uplink sends continuous high-speed digitized PMT samples, while downlink receives control, configuration LHC timing. Triple Mode Redundancy (TMR), Forward Error Correction (FEC) CRC (Cyclic Check) strategies, plus a double...
Reliable dosimetry systems are crucial for radiobiological experiments either to quantify the biological consequences of ionizing radiation or reproduce results by other laboratories. Also, they essential didactic purposes in field research. Professional dosemeters expensive and difficult use exposure facilities with closed chambers. Consequently, a simple, inexpensive, battery-driven dosemeter was developed that can be easily built using readily available components. Measurements were...
Modern detector systems use networks for data acquisition and experimental control. Often they have to be controlled by software that can quite complex in itself. Experimental control analysis packages like Matlab LabVIEW offer high-level modules rapid development. Both are able operate on standard provided a suitable protocol network communication is chosen. However, the two tend overlap some degree it isn't always clear which package, if any of them, best suited specific project. We...
When using segmented Ge-detectors for gamma ray tracking it is necessary to determine the segment pulse shapes with high accuracy. A high-speed data acquisition system many channels, precision and sampling rate required. To find optimum performance, we are investigating what can be achieved by a extremely rates, 10 bits @2 GS/s. There other applications such system. Higher rates usually mean lower bit resolution of ADC, but oversampling expect achieve very good energy time resolution. The...
The ATLAS Tile Calorimeter (TileCal) readout link and control daughterboard (DB) is the central on-detector hub of new TileCal electronics upgrade for high-luminosity large hadron collider (HL-LHC). DB, which has undergone gradual redesigns during development, provides connection between on- off-detector via bidirectional fiber-optic links. Two CERN-developed, radiation hard GBTx application specified integrated circuits (ASICs) receive LHC timing signals configuration commands through...
We present the results of our research into protocols for network based data acquisition systems. Such systems potentially offer high performance, especially with advent Gbit Ethernet, but sub-optimal choices architecture, and buffer sizes can create bottlenecks in system. have investigated these subjects on a system, developed flexible comprehensive application level protocol over TCP distribution commands data, maximized throughput by implementing an UDP transmission.
This paper presents an evaluation of the proposed LVDS serial data transmission scheme for ATLAS level-1 calorimeter trigger. Approximately 7000 high-bandwidth links are required to carry into algorithmic processors from Preprocessor crates. National Semiconductor’s Bus serialiser/deserialiser chipsets offer low power consumption at cost and synchronous with minimal latency. Test systems have been built measure real-time bit-error rates using pseudo-random binary sequences. Results show that...
The ATLAS hadronic Tile Calorimeter (TileCal) is being upgraded for the High Luminosity Large Hadron Collider (HL-LHC). We present a redesign of TileCal Phase II read out link and control Daughterboard (DB). DB has double redundant radiation tolerant design that will provide continuous high-speed readout digitized data samples $12$ photomultiplier channels each with two gains, while handling timing, communication between front-end off-detector electronics, all over multi-gigabit optical...
The ATLAS Tile Calorimeter (TileCal) readout link and control Daughter Board (DB) is the central on-detector hub of new TileCal electronics upgrade for high-luminosity Large Hadron Collider (HL-LHC). DB, which has undergone gradual redesigns during development, provides connection between on- off-detector via bi-directional fiber optic links. Two CERN-developed, radiation hard GBTx ASICs receive LHC timing signals configuration commands through 4.8 Gbps downlinks, are in turn propagated to...