A5025574354- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Distributed and Parallel Computing Systems
- Neutrino Physics Research
- Advanced Data Storage Technologies
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Astrophysics and Cosmic Phenomena
- Parallel Computing and Optimization Techniques
- advanced mathematical theories
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Network Traffic and Congestion Control
- Particle accelerators and beam dynamics
- Distributed systems and fault tolerance
- Digital Radiography and Breast Imaging
- Particle Accelerators and Free-Electron Lasers
- Interconnection Networks and Systems
- Radiation Effects in Electronics
- Optical and Acousto-Optic Technologies
European Organization for Nuclear Research
2016-2025
Tel Aviv University
2019-2024
Institute of High Energy Physics
2024
A. Alikhanyan National Laboratory
2024
Atlas Scientific (United States)
2024
The University of Adelaide
2020-2023
Northern Illinois University
2023
Brandeis University
2020
University of Pavia
2005-2007
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2004-2007
The ALICE and ATLAS DAQ systems read out detector data via point-to-point serial links into custom hardware modules, the RORC ROBIN. To meet increase in operational requirements both experiments are replacing their respective modules with a new common module, C-RORC. This card, developed by ALICE, implements PCIe Gen 2 x8 interface interfaces to twelve optical three QSFP transceivers. paper presents design of C-RORC, its performance application experiments.
For new detector and trigger systems to be installed in the ATLAS experiment after LHC Run 2, a approach will followed for Front-End electronics interfacing. The FELIX (Front-End LInk eXchange) system function as gateway connecting: on one side links, well providing timing information; other commodity switched network built using standard technology (either Ethernet or Infiniband). is described this paper, results achieved so far are presented.
ATLAS is one of the four experiments under construction along Large Hadron Collider (LHC) ring at CERN. The LHC will produce interactions a center-of-mass energy equal to radics = 14 TeV with frequency 40 MHz. detector consists more than 140 million electronic channels. challenging experimental environment and extreme complexity impose necessity common, scalable, distributed monitoring framework, which can be tuned for optimal use by different sub-detectors various levels data flow. This...
In the ATLAS experiment at LHC, ROD Crate DAQ provides a complete software framework to implement data acquisition functionality boundary between detector specific electronics and common part of system. Based on plugin mechanism, it allows selecting using services (like output monitoring channels) developing control acquire from modules providing infrastructure for control, calibration. Including also event building functionality, is intended be main tool first phase commissioning. This...
HPC network technologies like Infiniband, TrueScale or OmniPath provide low- latency and high-throughput communication between hosts, which makes them attractive options for data-acquisition systems in large-scale high-energy physics experiments. Like networks, DAQ networks are local include a well specified number of systems. Unfortunately traditional APIs clusters MPI PGAS exclusively target the community not suited applications. It is possible to build distributed applications using...
From the ATLAS Phase-I upgrade and onward, new or upgraded detectors trigger systems will be interfaced to data acquisition, detector control timing (TTC) by Front-End Link eXchange (FELIX). FELIX is core of Trigger/DAQ architecture. Functioning as a router between custom serial links commodity network, implemented server PCs with network interfaces PCIe cards large FPGAs many high speed fiber transceivers. By separating transport from manipulation, latter can done software in servers...
In the ATLAS experiment at LHC, ROD Crate DAQ provides a complete framework to implement data acquisition functionality boundary between detector specific electronics and common part of system. Based on plugin mechanism, it allows selecting using services (like output monitoring channels) developing simple libraries control, monitor, acquire and/or emulate electronics. Providing also event building functionality, is intended be main tool for first phase commissioning. This paper presents...
During the last years many test-beam sessions were carried out on each ATLAS subdetector in order to assess performances standalone mode. these tests, different monitoring programs developed ease setup of correct running conditions and assessment data quality. The experience has converged into a common effort develop program, which aims be exploitable by various groups. requirements drove design program as well its architecture are discussed this paper. Characteristic features application...
The ATLAS detector uses a real time selective triggering system to reduce the high interaction rate from 40 MHz its data storage capacity of 1 kHz. A hardware first level (L1) trigger limits 100 kHz and software (HLT) selects events for offline analysis. HLT Regions Interest (RoIs) identified by L1 provided Region Builder (RoIB). current RoIB is custom VMEbus based that operated reliably since run LHC . Since will reach higher luminosity increase complexity number triggers, it desirable have...
The ATLAS collaboration at CERN operated a combined test beam (CTB) from May until November 2004. prototype of data acquisition system (DAQ) was used to integrate other subsystems into common CTB setup. Data were collected synchronously all the detectors, which represented nine different detector technologies. Electronics and software first level trigger Event selection algorithms high integrated with tested real data. possibility operate remote Filter farm synchronized Trigger Acquisition...
ATLAS is one of the four experiments under construction along Large Hadron Collider at CERN. During 2004 combined test beam, GNAM monitoring system and OHP histogram presenter were widely used to assess both hardware setup data quality. a modular framework where detector specific code can be easily plugged in obtain online low-level applications. It based on tools provided by trigger acquisition (TDAQ) software, presenter, capable perform as configurable display browser. From OHP, requests...
Event data from proton-proton collisions at the LHC will be selected by ATLAS experiment in a three level trigger system, which reduces initial bunch crossing rate of 40 MHz its first two levels (LVL1+LVL2) to ~3 kHz. At this Event-Builder collects all read-out system PCs (ROSs) and provides fully assembled events event-filter (EF), is third trigger, achieve further reduction ~ 200 Hz for permanent storage. The event-builder based on farm O(100) PCs, interconnected via gigabit Ethernet...
The ATLAS detector at CERN records particle collision "events" delivered by the Large Hadron Collider. Its data-acquisition system identifies, selects, and stores interesting events in near real-time, with an aggregate throughput of several 10 GB/s. It is a distributed software executed on farm roughly 2000 commodity worker nodes communicating via TCP/IP Ethernet network. Event data fragments are received from many readout channels buffered, collected together, analyzed either stored...
The precision chambers of the ATLAS Muon Spectrometer are built with Monitored Drift Tubes (MDT). requirement high accuracy and low systematic error, to achieve a transverse momentum resolution 10% at 1 TeV, can only be accomplished if calibrations known an 20 μm. relation between drift path measured time (the socalled r-t relation) depends on many parameters (temperature T, hit rate, gas composition, thresholds,...) subject variations. has from data without use external detector, using...
Anomaly detection in distributed systems such as High-Performance Computing (HPC) clusters is vital for early fault detection, performance optimisation, security monitoring, reliability general but also operational insights. It enables proactive measures to address issues, ensuring system reliability, resource efficiency, and protection against potential threats. Deep Neural Networks have seen successful use detecting long-term anomalies multidimensional data, originating instance from...
The ATLAS High Level Trigger (HLT) is organized in two trigger levels running different selection algorithms on heterogeneous farms composed of off-the-shelf processing units. units have varying computing power and network connectivities. working conditions are changing due to the continuous optimization LHC operations consequent adjustment. In addition, rolling expansion replacement HLT hardware changes farm composition. Therefore, balancing available resources essential for optimizing...
In this paper we will report on the operation and performance of ATLAS data-flow system during 2011 physics run Large Hadron Collider at 7 TeV. The is responsible for reading out, formatting conveying event data, eventually saving selected events into mass storage. 2010 Trigger Data Acquisition has been operated with an overall e_ciency 96%, while meeting evolving demanding conditions. By end proton run, instantaneous peak luminosity had increased by 5 orders magnitudes. Correspondingly,...
In the ATLAS experiment at LHC, output of readout hardware specific to each subdetector will be transmitted buffers, located on custom made PCI cards ("ROBINs"). The data consist fragments events accepted by first-level trigger a maximum rate 100 kHz. Groups four ROBINs hosted in about 150 read-out subsystem (ROS) PCs. Event are forwarded request via Gigabit Ethernet links and switches second-level or event builder. this paper discussion functionality real-time properties ROS is combined...
This paper describes a new approach to the visualization of information about operation ATLAS Trigger and Data Acquisition system. is one two general purpose detectors positioned along Large Hadron Collider at CERN. Its data acquisition system consists several thousand computers interconnected via multiple gigabit Ethernet networks, that are constantly monitored different tools. Operational parameters ranging from temperature network utilization stored in databases for later analysis....
The ATLAS collaboration at CERN operated a combined test beam (CTB) from May until November 2004. prototype of data acquisition system (DAQ) was used to integrate other subsystems into common CTB setup. Data were collected synchronously all the detectors, which represented nine different detector technologies. Electronics and software first level trigger Event selection algorithms high integrated with tested real data. A possibility operate remote event filter farm synchronized TDAQ also...