J. Steffens

Publications (5)1.87 Total impact

• Source

  Available from: Andrei Talalaevskii

  Article: The High Voltage Feedthroughs for the ATLAS Liquid Argon Calorimeters

  B. Botchev, G Finocchiaro, J Hoffman, R.L. Mccarthy, M Rijssenbeek, J. Steffens, A. Talalaevskii, M. Thioye, M Zdrazil, J Farrell, S. Kane
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  ABSTRACT: The purpose, design specifications, construction techniques, and testing methods are described for the high voltage feedthrough ports and filters of the ATLAS Liquid Argon calorimeters. These feedthroughs carry about 5000 high voltage wires from a room-temperature environment (300 K) through the cryostat walls to the calorimeters cells (89 K) while maintaining the electrical and cryogenic integrity of the system. The feedthrough wiring and filters operate at a maximum high voltage of 2.5 kV without danger of degradation by corona discharges or radiation at the Large Hadron Collider.
  Journal of Instrumentation 02/2013; 2:T10002. · 1.87 Impact Factor
• Article: Construction, assembly and tests of the ATLAS electromagnetic barrel calorimeter

  B Aubert, B Beaugiraud, Jacques Colas, P Delebecque, L Di Ciaccio, M. El Kacimi, P Ghez, C Girard, M Gouanère, D. Goujdami, [......], S Rydström, Y Tayalati, B. Botchev, G Finocchiaro, J Hoffman, R.L. Mccarthy, M Rijssenbeek, J. Steffens, M Zdrazil, H.M. Braun
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  ABSTRACT: The construction and assembly of the two half barrels of the ATLAS central electromagnetic calorimeter and their insertion into the barrel cryostat are described. The results of the qualification tests of the calorimeter before installation in the LHC ATLAS pit are given.
• Article: Construction, assembly and tests of the ATLAS electromagnetic barrel calorimeter

  B Aubert, B Beaugiraud, J Colas, P Delebecque, L Di Ciaccio, M. El Kacimi, P Ghez, C Girard, M Gouanère, D. Goujdami, [......], S. Rydstrom, Y Tayalati, B. Botchev, G Finocchiaro, J Hoffman, R.L. Mccarthy, M Rijssenbeek, J. Steffens, M Zdrazil, H.M. Braun
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  ABSTRACT: The construction and assembly of the two half barrels of the ATLAS central electromagnetic calorimeter and their insertion into the barrel cryostat are described. The results of the qualification tests of the calorimeter before installation in the LHC ATLAS pit are given.
  Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
• Article: Performance of the ATLAS Electromagnetic Calorimeter End-cap Module 0

  Bernard Aubert, M Abouelouafa, C. Alexa, F Astesan, E Augé, V. M. Aulchenko, J. Ballansat, F Barreiro, P. Barrillon, G Battistoni, [......], Joost Herman Vossebeld, V Vuillemin, M Wielers, W J Willis, I Wingerter-Seez, J Ye, K Yip, D Zerwas, R Zitoun, Y Zolnierowski
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  ABSTRACT: The construction and beam test results of the ATLAS electromagnetic end-cap calorimeter pre-production module 0 are presented. The stochastic term of the energy resolution is between 10% GeV^1/2 and 12.5% GeV^1/2 over the full pseudorapidity range. Position and angular resolutions are found to be in agreement with simulation. A global constant term of 0.6% is obtained in the pseudorapidity range 2.5 < eta < 3.2 (inner wheel).
• Source

  Available from: V. M. Aulchenko

  Article: Performance of the Atlas electromagnetic calorimeter barrel module 0

  B Aubert, J. Ballansat, A Bazan, B Beaugiraud, J Boniface, F Chollet, J Colas, P Delebecque, L Di Ciaccio, N. Dumont-Dayot, [......], J. Lundqvist, L Megner, M. Pearce, S. Rydstrom, J. Egdemir, R. Engelmann, J Hoffman, R McCarthy, M Rijssenbeek, J. Steffens
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  ABSTRACT: The construction and performance of the barrel pre-series module 0 of the future ATLAS electromagnetic calorimeter at the LHC is described. The signal reconstruction and performance of ATLAS-like electronics has been studied. The signal to noise ratio for muons has been found to be 7.11+-0.07. An energy resolution of better than 9.5% GeV^1/2/sqrt{E} (sampling term) has been obtained with electron beams of up to 245GeV. The uniformity of the response to electrons in an area of Delta_eta x Delta_phi = 1.2 x 0.075 has been measured to be better than 0.8%.