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Elsener, K.

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TUOAKI02 CERN Neutrinos to Gran Sasso (CNGS): Results from Commissioning 692
 
  • M. Meddahi, K. Cornelis, K. Elsener, E. Gschwendtner, W. Herr, V. Kain, M. Lamont, J. Wenninger
    CERN, Geneva
 
  The CNGS project (CERN Neutrinos to Gran Sasso) aims at directly detecting muon neutrinos-tau neutrinos oscillations. An intense muon- neutrinos beam is generated at CERN and directed towards LNGS (Laboratori Nazionali del Gran Sasso) in Italy where tau-neutrinos will be detected in large and complex detectors. An overview of the CNGS beam facility is given. Results from the primary and secondary beam line commissioning performed in summer 2006 are presented. Measurements are compared with expectations.  
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TUPAN095 Design and Performance of the CNGS Secondary Beam Line 1601
 
  • E. Gschwendtner, L. Bruno, K. Elsener, A. Ferrari, M. Meddahi, A. Pardons, S. Rangod
    CERN, Geneva
  • A. Guglielmi
    INFN/LNL, Legnaro, Padova
  • P. R. Sala
    INFN-Milano, Milano
 
  An intense muon-neutrino beam (1017 nu-mu/day) is generated at CERN and directed towards the Gran Sasso National Laboratory, LNGS, in Italy, 732 km away from CERN. The muon-neutrinos are produced in association with muons in the decay of the pions and kaons created in the target. In the presently approved physics programme, it is foreseen to run the CNGS facility with 4.5 · 1019 protons/year for five years. During a CNGS cycle, i.e. every 6s, two nominal SPS extractions of 2.4 ·1013 protons each at 400GeV/c are sent down the proton beam line to the target. The CNGS secondary beam line, starting with the target, has to cope with this situation, which pushes the beam line equipment and instrumentation to the limits of radiation hardness, mechanical stresses, etc. during the CNGS operation. An overview of the CNGS secondary beam line will be shown. Emphasis will be on the target, the magnetic focusing lenses (horn and reflector) and the muon monitors. The performance of the secondary beam line during beam commissioning and physics operation will be discussed and measurements compared with simulations.