Author/Authors :
Büttner، نويسنده , , B. and Ebert، نويسنده , , J. and Ferber، نويسنده , , T. and Gِllnitz، نويسنده , , C. and Goloubkov، نويسنده , , D. and Hagner، نويسنده , , C. and Hierholzer، نويسنده , , M. and Hollnagel، نويسنده , , A. and Lenkeit، نويسنده , , J. and Rostovtseva، نويسنده , , I. and Schmidt-Parzefall، نويسنده , , W. and Wonsak، نويسنده , , B. and Zaitsev، نويسنده , , Y.، نويسنده ,
Abstract :
The goal of the OPERA experiment is to give the first direct evidence for neutrino oscillations in the channel ν μ → ν τ . The OPERA detector is designed to observe the appearance of tau neutrinos in the originally pure muon neutrino CNGS beam. An important part of the magnetic spectrometer is the Precision Tracker (PT), a drift tube detector consisting of 9504 drift tubes. Its main task is the determination of the muon charge and momentum. The alignment strategy for the PT consists of two parts: the hardware measurement by theodolite and the software alignment using long muon tracks. In this paper, the hardware and the software alignment are described, and the track-based alignment methods are explained in detail. Results of the software alignment are presented with a focus on the analysis of cosmic particles.
Keywords :
ALIGNMENT , opera , Precision Tracker , Neutrino , Gas detector , Drift tube
