8th International "Hiroshima" Symposium on the Development and Application of Semiconductor Tracking Detectors, Taipei, Taiwan

Alignment of the CMS Preshower Detector

5 Dec 2011, 09:10

6h 50m

Activity Center (Academia Sinica)

POSTER Poster sessions Poster session

Speaker

Mr Kai-Yi Kao (National Taiwan University (TW))

Description

The Preshower detector, as part of the CMS endcap electromagnetic calorimeter, is designed to have good spatial resolution to identify the position of incoming photons/electrons in the endcaps. It is based on 4288 silicon sensors, each with active area 61x61 mm^2 segmented into 32 strips with 1.9mm pitch. Its spatial resolution relies upon excellent alignment with the neighbouring detectors, especially the Tracker. This is based on the extrapolation of tracks from the Tracker to the Preshower and gives an alignment precision of a few millimeters for translation and a few milliradians for rotation. The method for Preshower alignment will be discussed and the results of the alignment with respect to the Tracker will be presented.

Presentation materials

Slides

Poster_Kao_ESAlignment_Kao_v3.pdf