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T: Fachverband Teilchenphysik

T 52: Spurkammern und Myondetektoren III

T 52.9: Talk

Wednesday, March 5, 2008, 19:00–19:15, Peterhof-HS 4

Track based alignment of the LHCb Inner Tracker — •Florin Maciuc¹, Michael Schmelling¹, Markward Britsch¹, Johan Blouw², and Marc Deissenroth² — ¹Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany — ²Physikalisches Institut, Philosophenweg 12, D-69120 Heidelberg, Germany

The LHCb experiment is designed for precision measurements of CP-violation and rare decays in the B-system. The required precise alignment of the detector components can be optimally achieved by software alignment based on measured particle tracks. To prepare the ground for the alignment of the LHCb Inner Tracker, we have applied the Millepede alignment method to realistic LHCb Monte Carlo data. A non-linear measurement model is linearized and an iterative Newton-Raphson method is coupled to the Millepede mathematical apparatus. The stability and convergence of the method is studied as a function of the ghost rate and noise level in the track sample.