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Sökning: WFRF:(DAM M.) > Konferensbidrag

  • Resultat 1-10 av 17
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  • Brenner, Richard, et al. (författare)
  • The ATLAS tau trigger and planned trigger efficiency studies with early data
  • 2009
  • Ingår i: Proceedings of CHarged2008. - Trieste : Proceedings of Science. ; , s. 1-7
  • Konferensbidrag (refereegranskat)abstract
    • The tau trigger system of the ATLAS detector has been developed to increase the sensitivity ofthe detector to the Higgs boson and searches for physics beyond the Standard Model.  A trigger system split in three levels has been designed for hadronically decaying tau leptons optimized for efficiency and good background rejection.  At the first level the trigger uses only information from the calorimeters while the other two levels include also information from the tracking.  Both energy and shape variables for the hadronic tau jets are used in the trigger algorithms.  The very intense QCD background, however, makes it a challenge to develop an efficient trigger with high purity at low transverse momentum. Thus the tau trigger is best used in combination with other trigger variables such as missing transverse energy or jets.  Before the tau trigger can be used in searches, it has to be commissioned with data and the efficiency and background rejectionof QCD has to be studied in detail.
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  • Åkesson, Torsten, et al. (författare)
  • ATLAS Transition Radiation Tracker test-beam results
  • 2004
  • Ingår i: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. - : Elsevier BV. - 0168-9002. ; 522:1-2, s. 50-55
  • Konferensbidrag (refereegranskat)abstract
    • Several prototypes of the Transition Radiation Tracker for the ATLAS experiment at the LHC have been built and tested at the CERN SPS accelerator. Results from detailed studies of the straw-tube hit registration efficiency and drift-time measurements and of the pion and electron spectra without and with radiators are presented.
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  • Van Dam, K.K., et al. (författare)
  • Velo and REXAN – Integrated Data Management and High Speed Analysis for Experimental Facilities
  • 2012
  • Ingår i: <em>Proceeding IEEE International Conference on E-Science</em> 2012. - 9781467344678 ; , s. 1-9
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • The Chemical Imaging Initiative at the Pacific Northwest National Laboratory (PNNL) is creating a `Rapid Experimental Analysis' (REXAN) Framework, based on the concept of reusable component libraries. REXAN allows developers to quickly compose and customize high throughput analysis pipelines for a range of experiments, as well as supporting the creation of multi-modal analysis pipelines. In addition, PNNL has coupled REXAN with its collaborative data management and analysis environment Velo to create an easy to use data management and analysis environments for experimental facilities. This paper will discuss the benefits of Velo and REXAN in the context of three examples: PNNL High Resolution Mass Spectrometry - reducing analysis times from hours to seconds, and enabling the analysis of much larger data samples (100KB to 40GB) at the same time. · ALS X-Ray Tomography - reducing analysis times of combined STXM and EM data collected at the ALS from weeks to minutes, decreasing manual work and increasing data volumes that can be analysed in a single step. · Multi-modal nano-scale analysis of STXM and TEM data - providing a semi automated process for particle detection. The creation of REXAN has significantly shortened the development time for these analysis pipelines. The integration of Velo and REXAN has significantly increased the scientific productivity of the instruments and their users by creating easy to use data management and analysis environments with greatly reduced analysis times and improved analysis capabilities.
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  • Åkesson, Torsten, et al. (författare)
  • Operation of the ATLAS Transition Radiation Tracker under very high irradiation at the CERN LHC
  • 2004
  • Ingår i: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. - : Elsevier BV. - 0168-9002. ; 522:1-2, s. 25-32
  • Konferensbidrag (refereegranskat)abstract
    • The ATLAS Transition Radiation Tracker (TRT) performance depends critically on the choice of the active gas and on its properties. The most important operational aspects, which have led to the final choice of the active gas for the operation of the TRT at the LHC design luminosity, are presented. The TRT performance expected at these conditions is reviewed, including pile-up effects at high luminosity. (C) 2004 Elsevier B.V. All rights reserved.
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  • Resultat 1-10 av 17

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