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Wyświetlanie 1-6 z 6
Tytuł:
Modeling of Synchronous Data Streams Processing in the RPC Muon Trigger System of the CMS Experiment
Autorzy:
Poźniak, K. T.
Powiązania:
https://bibliotekanauki.pl/articles/226758.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
synchronization
particle measurements
data acquisition
triggering
measurement system
Opis:
This paper presents signal synchronization aspects in a large, distributed, multichannel RPC Muon Trigger system in the CMS experiment. The paper is an introduction to normalized structure analysis methods of such systems. The method introduces a general model of the system, presented in a form of a network of distributed, synchronous, pipeline processes. The model is based on a definition of a synchronous data stream and its formal, fundamental properties. Theoretical considerations are supported by a practical application of synchronous streams and processes management. The following processes were modeled and implemented in hardware: window synchronization, derandomization, data concentration and generation of test pulses. There are presented chosen results of the model application in the CMS experiment.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 4; 489-502
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The ATLAS experiment on-line monitoring and filtering as an example of real-time application
System monitoringu i filtracji eksperymentu ATLAS jako przykład aplikacji czasu rzeczywistego
Autorzy:
Korcyl, K.
Szymocha, T.
Funika, W.
Kitowski, J.
Słota, R.
Bałos, K.
Dutka, Ł.
Guzy, K.
Kryza, T.
Pieczykolan, J.
Powiązania:
https://bibliotekanauki.pl/articles/305349.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
fizyka wysokich energii
przetwarzanie w czasie rzeczywistym
system filtracji
zdalne farmy
high energy physics
real-time procesing
trigger system
remote farms
Opis:
The ATLAS detector, recording LHC particles' interactions, produces events with rate of 40 MHz and size of 1.6 MB. The processes with new and interesting physics phenomena are very rare, thus an efficient on-line filtering system (trigger) is necessary. The asynchronous part of that system relays on few thousands of computing nodes running the filtering software. Applying refined filtering criteria results in increase of processing times what may lead to lack of processing resources installed on CERN site. We propose extension to this part of the system based on submission of the real-time filtering tasks into the Grid.
Detektor ATLAS, rejestrujący zderzenia protonów rozpędzanych w zderzaczu LHC, będzie generował przypadki o rozmiarze 1.6MB z częstotliwością 40MHz. Aby wyselekcjonować bardzo rzadko występujące przypadki z interesującymi oddziaływaniami fizycznymi, konieczne będzie zastosowanie wydajnego systemu filtracji (trigger). Część asynchroniczna takiego systemu wykorzystuje kilka tysięcy komputerów, na których wykonywane jest oprogramowanie filtrujące. Zwiększenie selektywności systemu wymaga zwiększenia czasu procesowania, co może doprowadzić do wyczerpania zasobów komputerowych zainstalowanych w CERN-ie. Proponujemy rozszerzenie tej części systemu poprzez umożliwienie wykonywania oprogramowania filtrującego w czasie rzeczywistym na komputerach w środowisku gridowym.
Źródło:
Computer Science; 2008, 9; 77-86
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two dimensional model of CMM probing system
Autorzy:
Ali, Salah H.R.
Powiązania:
https://bibliotekanauki.pl/articles/950738.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
CMM
trigger probe
stylus tip
tip root errors
and two-dimensional-model (2DM)
Opis:
A coordinate measuring machine (CMM) as an automation technology is playing the key role in the modern industry to improve the measurement accuracy. Accurate probing that is computer controlled is the current trend for the next generation of coordinate metrology. However, the CMM probing system is limited by its dynamic root errors that may markedly affect its response characteristics. In this paper, dynamic response errors of CMM measurements have been analyzed. The adopted probe stylus sizes throughout the course of measurements are found to cause some waviness errors during CMM operations due to each of the prescribed angle of the probe tip contact point with the specimen surface and the radius of the stylus tip. Variations in the geometry of the stylus have their consequent effects on its inherent intrinsic dynamic characteristics that in turn would cause relevant systematic root errors in the resulted measurements. Unforeseeable geometrical errors of a CMM using a ductile touch-trigger probing system have been characterized theoretically. These results are analyzed in order to investigate the effect of the dynamic root errors in the light of six probe stylus tip of the situation into account when assessing the accuracy of the CMM measurements. Analytical approaches have been applied on a developed two dimensional model (2DM) of stylus tip to demonstrate the capability of such approaches of emphasizing the root error concept using the strategy of CMM ductile trigger type of probe.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 2; 3-7
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiboard trigger link synchronization and diagnostics
Autorzy:
Wojenski, A.
Pozniak, K.
Mazon, D.
Chernyshova, M.
Powiązania:
https://bibliotekanauki.pl/articles/114174.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
data quality monitoring
FPGA
GEM detector
soft X-ray plasma diagnostics
trigger distribution
measurement system
Opis:
Soft X-ray (SXR) plasma measurements are important type of diagnostics especially in tokamak facilities. Main output products are energy and topology spectra distributed in time. In case of Gas Electron Multiplier (GEM) detectors, used as radiation sensors, large number of analog readout channels must be provided. For this purpose Field-Programmable Gate Arrays (FPGAs) are used. Data quality monitoring (DQM) is important topic in case of asynchronous events registered by the measurement unit. Due to numerous FPGAs used it is necessary to provide advanced trigger synchronization between them. In the paper is proposed an algorithmic approach for the trigger link training and diagnostics. It is a key component in order to provide consistent measurement data for DQM analysis. The contents of the article covers the plasma experiments and related DQM topics. In following chapters explanation of the synchronization problem is described. The proposed algorithm will be used for trigger link synchronization and diagnostics aspects. The simulations are also discussed. Currently, the proposed ideas are at the stage of implementation and tests on real hardware. Simulation were successfully performed. Summary of the work carried out is presented at the end of the paper.
Źródło:
Measurement Automation Monitoring; 2017, 63, 6; 223-225
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zero-Suppression Trigger Mode for GEM Detector Measurement System
Autorzy:
Kolasinski, Piotr
Pozniak, Krzysztof
Wojenski, Andrzej
Linczuk, Pawel
Krawczyk, Rafal
Gaska, Michal
Zabolotny, Wojciech
Kasprowicz, Grzegorz
Chernyshova, Maryna
Czarski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1844608.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
FPGA
GEM
trigger
sequencer
DAQ
Xilinx
Opis:
A novel approach to a trigger mode in the Gas Electron Multiplier (GEM) detector readout system is presented. The system is already installed at WEST tokamak. The article briefly describes the architecture of the GEM detector and the measurement system. Currently the system can work in two trigger modes: Global Trigger and Local Trigger. All trigger processing blocks are parts of the Charge Signal Sequencer module which is responsible for transferring data to the PC. Therefore, the article presents structure of the Sequencer with details about basic blocks, theirs functionality and output data configuration. The Sequencer with the trigger algorithms is implemented in an FPGA chip from Xilinx. Global Trigger, which is a default mode for the system, is not efficient and has limitations due to storing much data without any information. Local trigger which is under tests, removes data redundancy and is constructed to send only valid data, but the rest of the software, especially on the PC side, is still under development. Therefore authors propose the trigger mode which combines functionality of two existing modes. The proposed trigger, called Zero Suppression Trigger, is compatible with the existing interfaces of the PC software, but is also capable to verify and filter incoming signals and transfer only recognized events. The results of the implementation and simulation are presented.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 1; 103-108
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Description of the pneumatic work cycle of the starting unit of the UAV launcher
Autorzy:
Jastrzębski, G.
Powiązania:
https://bibliotekanauki.pl/articles/247898.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
launcher
pneumatic trigger
pneumatic system
Opis:
The publication presents a UAV pneumatic launcher designed and built in ITWL. The basic element of the pneumatic launcher is the launch mechanism. The starting mechanism determines the energy parameters that will be reached on the launch pad. The work of the launch engines used in propulsion systems has been reviewed and their advantages and disadvantages are discussed when used in pneumatic launchers. A detailed description of the author’s solution of the pneumatic launching mechanism from the launcher is presented. In order to determine guidelines for the design of pneumatic starter systems, a description of the cycle of operation of the complex pneumatic system was analysed. The description of the pneumatic system’s work cycle was based on the parameters of the flow of the compressed air C and b (C – the sound conductivity of the pneumatic element, b – the critical pressure of the pneumatic element). A set of equations describing the pressure change in the filled and emptied valve compartment and the equation of motion are presented. The equations of a mathematical model describing the pneumatic component and the replacement value of flow parameters for the pneumatic system of series pneumatic components are presented. For the mathematical model, a calculation algorithm is presented which takes into account the initial conditions and the boundary conditions of the various periods of the pneumatic system cycle. Examples of calculation results for a specific pneumatic trigger mechanism are shown. The results obtained were compared with the results of the pneumatic starter station tests and the mathematical model of the pneumatic starter was evaluated.
Źródło:
Journal of KONES; 2017, 24, 4; 61-70
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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