99 research outputs found
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VxWorks v5.1 benchmark tests
No full textWe measure the performance of the VxWorks Real-time Operating System on various VME single-board computers and compare VxWorks (v5.02) and VxWorks(v5.1)
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EPICS performance evaluation
No full textThe authors report on the software architecture, some CPU and memory issues, and the performance of the Experimental Physics and Industrial Control System (EPICS). Specifically, they subject each EPICS software layer to a series of tests and extract quantitative results that should be useful to system architects planning to use EPICS for control applications
Trigger and DAQ Issues in Low-Mass Higgs Searches Superconducting Super Collider Laboratory
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Design and implementation of the STAR experiment`s DAQ
No full textThe STAR experiment is one of the two large detectors currently being built at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory, Upton, New York, USA. The major issue of STAR`s DAQ is the large amount of data that has to be processed as fast as possible. The required data rate is of the order of 90 Gbits/s which has to be processed and scaled down to about 15 MBytes/s and stored to tape or other permanent archiving media. To be able to do so the STAR DAQ uses a custom built ASIC which preprocesses the raw data for later use by a software Level 3 trigger. The Level 3 trigger selects events to be archived depending on physics criteria based upon the particle track information extracted during Level 3 processing. The design presented is a massively parallel multi-processor system which consists of front end microprocessors hierarchically organized within a VME crate system. Each VME crate contains 6 custom made Receiver Boards with 3 Intel I960HD processors per board for a total of 18 processors per crate. The STAR`s TPC detector uses 24 such crates and the SVT detector will use 4 crates for a total of 504 microprocessors
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Trigger and DAQ issues in low-mass Higgs searches
No full textResults from ongoing trigger and DAQ studies at the Superconducting Super Collider Laboratory are presented. Specific Higgs decay modes are identified, calorimetric triggering algorithms are examined, and implications for data acquisition are discussed
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Graphics in DAQSIM
No full textAt the Superconducting Super Collider Laboratory (SSCL) a tool called DAQSIM has been developed to study the behavior of Data Acquisition (DAQ) systems. This paper reports and discusses the graphics used in DAQSIM. DAQSIM graphics includes graphical user interface (GUI), animation, debugging, and control facilities. DAQSIM graphics not only provides a convenient DAQ simulation environment, it also serves as an efficient manager in simulation development and verification
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