2010 17th IEEE-NPSS Real Time Conference最新文献_第2页

High rate packet transmission via IP-over-InfiniBand using commodity hardware 使用商用硬件，通过IP-over-InfiniBand进行高速数据包传输

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/RTC.2010.5750409

D. Bortolotti, A. Carbone, D. Galli, I. Lax, U. Marconi, G. Peco, S. Perazzini, V. Vagnoni, M. Zangoli

引用次数: 1

Triggers, data flow and the synchronization between the Auger surface detector and the AMIGA underground muon counters 触发器，数据流和俄歇表面探测器和AMIGA地下μ子计数器之间的同步

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/TNS.2011.2142194

Z. Szadkowski

{"title":"Triggers, data flow and the synchronization between the Auger surface detector and the AMIGA underground muon counters","authors":"Z. Szadkowski","doi":"10.1109/TNS.2011.2142194","DOIUrl":"https://doi.org/10.1109/TNS.2011.2142194","url":null,"abstract":"The aim of the AMIGA project (Auger Muons and Infill for the Ground Array) is an investigation of Extensive Air Showers at energies lower than by standard Auger array, where the transition from galactic to extragalactic sources is expected. The Auger array is enlarged by a relatively small dedicated area of surface detectors with nearby buried underground muon counters at half or less the standard 1.5 km grid. Lowering the Auger energy threshold by more than one order of magnitude allows a precise measurement of the cosmic ray spectrum in the very interesting regions of the second knee and the ankle. The paper describes the working principle of the Master/Slave (standard Auger surface detector/the underground muon counters) synchronous data acquisition, general triggering and the extraction of data corresponding to the real events from underground storage buffers applied in two prototypes: A) with 12.5 ns resolution (80 MHz) built from 4 segments: standard Auger Front End Board (FEB) and Surface Single Board Computer (SSBC) (on the surface) and the Digital Board with the FPGA and the Microcontroller Board (underground), B) with 4-times higher: 3.125 ns resolution (320 MHz) built with two segments only: new surface Front End Board supported by the NIOS® processor and CycloneIII™ Starter Kit board underground, working also with NIOS® virtual processor, which replaces the external TI µC, which in meantime became obsolete. The system with the NIOS® processors can remotely modify and update: the AHDL firmware creating the hardware FPGA net structure responsible for the fast DAQ, the internal structure of the NIOS® (resources and peripherals) and the NIOS® firmware (C code) responsible for software data management. With the standard µC, the µC firmware was fixed and could not be updated remotely. The 80 MHz prototype passed laboratory tests with real scintillators. The 320 MHz prototype (still being optimized) is considered as the ultimate AMIGA design.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129246362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Upgrades for the PHENIX data acquisition system PHENIX数据采集系统的升级

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/RTC.2010.5750356

M. Purschke

引用次数: 0

Development of an optical link card for the upgrade phase II of TileCal experiment TileCal实验二期升级用光链路卡的研制

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/RTC.2010.5750449

F. Carrió, V. Castillo, A. Ferrer, V. González, E. Higón, C. Marin, P. Moreno, E. Sanchis, C. Solans, A. Valero, J. Valls

引用次数: 0

Commissioning of the ATLAS High Level Trigger with proton collisions at the LHC 在大型强子对撞机上进行质子碰撞的ATLAS高水平触发器的调试

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/RTC.2010.5750350

B. Petersen

引用次数: 1

Hard Real-Time wireless communication in the northern Pierre Auger Observatory Pierre Auger天文台北部的硬实时无线通信

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/RTC.2010.5750355

R. Kieckhafer

引用次数: 7

DAQ architecture design of Daya Bay Reactor Neutrino Experiment 大亚湾反应堆中微子实验DAQ体系结构设计

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/RTC.2010.5750404

Fei Li, X. Ji, Xiao-nan Li, K. Zhu

引用次数: 23

Commissioning of the ATLAS High Level muon trigger with beam collisions 具有光束碰撞的ATLAS高水平介子触发器的调试

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/RTC.2010.5750408

M. Owen

引用次数: 0

Network resiliency implementation in the ATLAS TDAQ system ATLAS TDAQ系统的网络弹性实现

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/RTC.2010.5750373

S. Stancu, A. Al-Shabibi, S. Batraneanu, S. Ballestrero, C. Caramarcu, B. Martin, D. Savu, R. Sjoen, L. Valsan

引用次数: 0

Real-time configuration changes of the ATLAS High Level Trigger ATLAS高电平触发器的实时配置变化

2010 17th IEEE-NPSS Real Time Conference Pub Date : 2010-05-24 DOI: 10.1109/RTC.2010.5750407

F. Winklmeier

{"title":"Real-time configuration changes of the ATLAS High Level Trigger","authors":"F. Winklmeier","doi":"10.1109/RTC.2010.5750407","DOIUrl":"https://doi.org/10.1109/RTC.2010.5750407","url":null,"abstract":"The ATLAS High Level Trigger (HLT) is a distributed real-time software system that performs the final online selection of events produced during proton-proton collisions at the Large Hadron Collider (LHC). It is designed as a two-stage trigger and event filter running on a farm of commodity PC hardware. Currently the system consists of about 850 processing nodes and will be extended incrementally following the expected increase in luminosity of the LHC to about 2300 nodes. The event selection within the HLT applications is carried out by specialized reconstruction algorithms. The selection can be controlled via properties that are stored in a central database and are retrieved at the startup of the HLT processes, which then usually run continuously for many hours. To be able to respond to changes in the LHC beam conditions, it is essential that the algorithms can be re-configured without disrupting data taking while ensuring a consistent and reproducible configuration across the entire HLT farm. The techniques developed to allow these real-time configuration changes will be exemplified on the basis of two applications: trigger prescales and beamspot measurement. The prescale value determines the fraction of events an HLT algorithm is being executed on, including when it is deactivated. This feature is both essential during the commissioning phase of the HLT as well as for adjusting the mixture of recorded physics events during an LHC run. The primary event vertex distribution, from which the beam spot position and size can be extracted, is measured by a dedicated HLT algorithm on each node and periodically aggregated across the HLT farm and its parameters are published and stored in the conditions database. The result can be fed back to the HLT algorithms to maintain selection efficiency and rejections rates. Finally, the technologies employed to allow the simultaneous database access of thousands of applications in an online environment will be shown.","PeriodicalId":345878,"journal":{"name":"2010 17th IEEE-NPSS Real Time Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116878279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8