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hadron

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MOM1MP01 Massive Tracking on Heterogeneous Platforms simulation, dynamic-aperture, controls, collider 13
 
  • E. McIntosh, F. Schmidt
    CERN, Geneva
  • F. de Dinechin
    ENS LYON, Lyon
  The LHC@home project uses public resource computing to simulate circulating protons in the future Large Hadron Collider (LHC). As the physics simulated may become chaotic, checking the integrity of the computation distributed over a heterogeneous network requires perfectly identical (or homogeneous) floating-point behaviour, regardless of the model of computer used. This article defines an acceptable homogeneous behaviour based on existing standards, and explains how to obtain it. This involves processor, operating system, programming language and compiler issues. In the LHC@home project, imposing this homogeneous behaviour entailed less than 10% performance degradation per processor, and almost doubled the number of processors which could be usefully exploited.  
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TUPPP14 The TileCal DCS Detector Control System controls, monitoring, power-supply, laser 118
 
  • J. Pina, A. Gomes, C. N. Marques
    LIP, Lisboa
  • C. Alexa, G. Arabidze
    CERN, Geneva
  • M. Ouchrif
    Université Blaise Pascal, Clermont-Ferrand
  • A. Zenin
    IHEP Protvino, Protvino, Moscow Region
  TileCal is the barrel hadronic calorimeter of the ATLAS detector. The main task of the TileCal Detector Control System (DCS) is to enable the coherent and safe operation of the detector. All actions initiated by the operator and all errors, warnings and alarms concerning the hardware of the detector are handled by DCS. TileCal DCS design is being finalized, prototypes of most of the systems were already produced, and some components were already produced and installed in the detector. The low voltage control system is composed by several components with monitoring and control mostly based on the ATLAS developped ELMB boards. The high voltage system is based on the HV-micro boards developed by TileCal. A DCS system covering a small sector of the TileCal barrel was assembled and is already working in the ATLAS cavern, and by October we expect to have already a full partition equipped with low voltage, high voltage and cooling system.