Dortmund 2006 – scientific programme
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T: Teilchenphysik
T 710: Alignment
T 710.2: Talk
Friday, March 31, 2006, 14:45–15:00, C2-03-527
CMS-Tracker Alignment using Millepede II — •Markus Stoye, Georg Steinbrück und Peter Schleper — Institut für Experimentalphysik Hamburg
The Alignment of the CMS tracker will require to determine about 105 alignment parameters. The Millepede program, a linear least-squares algorithm, is a promising candidate for this task, having been used successfully for alignment in several experiments such as H1 and CDF. However, due to the inversion of a large matrix of linear equations, Millepede in its original form was limited to problems with maximal 104 alignment parameters. A new version of the program, Millepede II, provides an iterative method to determine the solution of the matrix and can handle 105 parameters. Alignment results for the CMS-Tracker obtained with Millepede II are shown.