Title of article
The OPERA muon spectrometers
Author/Authors
Garfagnini، نويسنده , , A. and Bergnoli، نويسنده , , A. and Brugnera، نويسنده , , R. and Carrara، نويسنده , , E. and Ciesielski، نويسنده , , R. and Dal Corso، نويسنده , , F. and Dusini، نويسنده , , S. and Fanin، نويسنده , , C. and Longhin، نويسنده , , A. and Stanco، نويسنده , , L. and Cazes، نويسنده , , A. and Cecchetti، نويسنده , , A. and Di Troia، نويسنده , , C. and Dulach، نويسنده , , B. and Felici، نويسنده , , G. and Mengucci، نويسنده , , A. and Orecchini، نويسنده , , D. and Paoloni، نويسنده , , A. and Spinetti، نويسنده , , M. Livia Terranova، نويسنده , , F. and Ventura، نويسنده , , M. and Votano، نويسنده , , L. and Candela، نويسنده , , A. and D’Incecco، نويسنده , , M. and Gustavino، نويسنده , , C. and Lindozzi، نويسنده , , M.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2007
Pages
4
From page
177
To page
180
Abstract
The OPERA experiment will study ν μ to ν τ oscillations through τ appearance on the 732 km long CERN to Gran Sasso baseline. The magnet yokes of the two muon spectrometers are instrumented with 48 planes of high resistivity bakelite Resistive Plate Chambers (RPC) operated in streamer mode. Each plane covers about 70 m 2 . A general introduction to the system installation and commissioning will be given. Four RPC planes were instrumented and the first tests were performed confirming a good behavior of the installed RPCs in terms of intrinsic noise and operating currents. The measured noise maps agree with those obtained in the extensive quality test performed at surface. Counting rates are below 20 Hz / m 2 . Single and multiple cosmic muon tracks were also reconstructed. The estimated efficiency is close to the geometrical limit and the very first measurements of the absolute and differential muon flux are in agreement with the expectations. Finally, a description of the readout electronics and of the slow control system is given.
Keywords
Cosmic rays , opera , RPC , Commissioning , Installation , Test
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
2007
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2204980
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