A5106178786- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Distributed and Parallel Computing Systems
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Advanced Data Storage Technologies
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Parallel Computing and Optimization Techniques
- Black Holes and Theoretical Physics
- Muon and positron interactions and applications
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
- Microgrid Control and Optimization
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Nuclear physics research studies
- Scientific Computing and Data Management
- Smart Grid Energy Management
- Radiation Effects in Electronics
- Noncommutative and Quantum Gravity Theories
- Advanced Data Processing Techniques
- Calibration and Measurement Techniques
Shanghai Dianji University
2023
Centre de physique des particules de Marseille
1990-2022
Aix-Marseille Université
1991-2020
X-Fab (Germany)
2018
Max Planck Institute for Physics
2011-2012
Centre National de la Recherche Scientifique
1990-2012
Institut National de Physique Nucléaire et de Physique des Particules
1992-2012
Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules
1992-2005
European Organization for Nuclear Research
2004-2005
University of Geneva
2003
The ATLAS High Level Trigger's (HLT) primary function of event selection will be accomplished with a Level-2 trigger farm and an filter (EF) farm, both running software components developed in the offline reconstruction framework. While this approach provides unified framework for selection, it poses strict requirements on critical trigger. A decision must typically within 10 ms multiple processing concurrent threads. To address these constraints, prototypes have been that incorporate...
Following rigorous software design and analysis methods, an object-based architecture has been developed to derive the second- third-level trigger decisions for future ATLAS detector at LHC. The functional components within this system responsible generating elements of are algorithms running architecture. Relevant aspects reviewed along with concrete examples specific their performance in "vertical" slices various physics selection strategies.
The Event Filter (EF) selection stage is a fundamental component of the ATLAS Trigger and Data Acquisition architecture. Its primary function reduction data flow rate to values acceptable by mass storage operations subsequent offline reconstruction analysis steps. computing instrument EF organized as set independent subfarms, each connected one output Builder (EB) switch fabric. Each subfarm comprises number processors analyzing several complete events in parallel. This paper describes...
The ATLAS combined test beam in the second half of 2004 saw first deployment High-Level Trigger (HLT). next steps are on pre-series farms experimental area during 2005, commissioning and cosmics tests with full detector 2006 collisions 2007. This paper reviews experience gained beam, describes current status discusses further enhancements to be made. We address issues related dataflow, integration selection algorithms, testing, software distribution, installation improvements.
To cope with the 40 MHz event production rate of LHC, trigger ATLAS experiment selects events in three sequential steps increasing complexity and accuracy whose final results are close to offline reconstruction. The Level-1, implemented custom hardware, identifies physics objects within Regions Interests operates a first reduction 75 kHz. higher levels, Level-2 Level-3, provide software based selection which further reduces about 100 Hz. This paper presents algorithm (/spl mu/Fast) employed...
ATLAS is one of the four LHC experiments that will start data taking in 2007, designed to cover a wide range physics topics. The trigger system has cope with rate 40 MHz and 23 interactions per bunch crossing. It divided three different levels. first (hardware based) provides signature confirmed by following levels (software running sequence algorithms validating signal step step, looking only region space indicated level (seeding). In this presentation, performance these sequences run at...
The ATLAS combined test beam in the second half of 2004 saw first deployment high-level triggers (HLT). next steps are on pre-series farms experimental area during 2005, commissioning and cosmics tests 2006 collisions 2007. This paper reviews experience gained beam, describes current status discusses further enhancements to be made. We address issues related dataflow, selection algorithms, testing, software distribution, installation improvements
The ATLAS experiment at the Large Hadron Collider (LHC) will face challenge of efficiently selecting interesting candidate events in pp collisions 14 TeV center mass energy, while rejecting enormous number background events, stemming from an interaction rate up to 10/sup 9/ Hz. Level1 trigger reduce this around /spl Oscr/(100kHz). Subsequently, high level (HLT), which is comprised Second Level and Event Filter, need further by a factor Oscr/(10/sup 3/). HLT selection software based be...
The ATLAS High Level Trigger (HLT) system provides software-based event selection after the initial LVL1 hardware trigger. It is composed of two stages, LVL2 trigger and Event Filter. HLT implemented as software tasks running on large processor farms. An essential part supervision system, which responsible for configuring, coordinating, controlling monitoring many hundreds processes in HLT. A prototype implementation using tools from Online Software presented. Results scalability tests are...
The ATLAS high-level trigger (HLT) system provides software-based event selection after the initial LVL1 hardware trigger. It is composed of two stages, LVL2 and filter (EF). performs with optimized algorithms using selected data guided by Region Interest pointers provided Those events are built into complete events, which passed to EF for a further stage classification off-line algorithms. Events surviving storage. stages HLT implemented on processor farms. concept distributing process...
To configure the RD13 data acquisition system, we need many parameters which describe various hardware and software components.Such information has been defined using an entityrelation model stored in a commercial memory-resident database.During last year, Itasca, object oriented database management system (OODB), was chosen as replacement system.We have ported existing databases (hw sw configurations, run etc.) to Itasca integrated it with control believe that is possible use OODB real-time...
An overview of the studies for ATLAS Event Filter is given. The architecture and high level design DAQ-1 prototype presented. current status if prototypes briefly Finally, future plans milestones are
The optimal dispatching of microgrid refers to the allocation and arrangement output each distributed power supply on premise satisfying balance between load supply, so as realise operation microgrid. In this paper, economic cost environmental pollution control are considered, model is established, improved grasshopper optimisation algorithm used solve, scheme obtained, costs reduced. Effectiveness Multi-microgrid verified through simulation experiments.
The DAQ group of the future ATLAS experiment has developed a prototype system based on trigger/DAQ architecture described in Technical Proposal to support studies full functionality, as well available hardware and software technologies. One sub-system this is back-end which encompasses needed configure, control monitor DAQ, but excludes processing transportation physics data. consists number components including run control, configuration databases message reporting system. been using...
2400205 Enhancement of Magnetoresistance by Co Substitution in Pr
The trigger system of the ATLAS experiment at LHC aims a high selectivity in order to keep full physics potential while reducing 40 MHz initial event rate imposed by bunch crossing down /spl sim/100 Hz, as required data acquisition system. Algorithms working final stage environment (Event Filter) are implemented run both "wrapped" mode (reconstructing tracks entire Muon Spectrometer) and "seeded" (according dedicated strategy that performs pattern recognition only regions detector where...