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Development and Quality Testing of the Tracker Outer Barrel for CMS at Helsinki Institute of Physics

This document outlines the collaboration efforts of the Helsinki Institute of Physics and various universities for the CMS project, focusing on the Tracker Outer Barrel (TOB). It details the assembly process of support structures, quality testing of silicon detector modules, and the radiation hard silicon detector development. Precision measurements are conducted at the Helsinki University of Technology to ensure alignment. Additionally, the production status of silicon detector modules from various international facilities is summarized, emphasizing the project's challenges in Finland regarding infrastructure and funding.

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Development and Quality Testing of the Tracker Outer Barrel for CMS at Helsinki Institute of Physics

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  1. The Finnish CMS Collaboration • Helsinki Institute of Physics S. Czellar, A. Heikkinen, J. Härkönen, V. Karimäki, H. Katajisto,R. Kinnunen,T. Lampén, K. Lassila-Perini, P. Luukka, S. Lehti, T. Lindén, T. Mäenpää, J. Nysten, J. Tuominiemi, E. Tuominen, D. Ungaro, M. Voutilainen, L. Wendland • Lappeenranta University of Technology T.Tuuva, T.Palviainen • Helsinki University of Technology P. Aarnio

  2. HIP CMS Programme • CMS SOFTWARE AND PHYSICS PROJECT • CMS TRACKER PROJECT

  3. 1. TheTrackerProject CMS Construction: • Support structure of the Tracker Outer Barrel (TOB) • Quality tests of the TOB Silicon detector modules • RPC muon trigger link R&D: • Development of radiation hard silicon detectors

  4. Tracker Outer Barrel HIP ”Big Wheel” Prototype 2001 Being ordered now

  5. TOB Support Structure • The detector modules are assembled on special supports called rods

  6. Tracker Outer Barrel (TOB): Support Structure • The support rods are being assembled at HIP Kumpula Laboratory. Rod components are purchased from Finnish Industry. • Precision measurements of the rods are done in collaboration with the Laboratory of Machine Design, Helsinki University of Technology (precision 5 mm).

  7. TOB Support Structure • The results of the precision measurements are stored in the CMS data base for alignment. • The rods are sent via CERN to the module building labs, where the modules are installed on the rods • All 5500 modules are to be installed in the wheel by April 2005 .

  8. TOB Silicon Module Tests • Production of the TOB Silicon detector modules has been launched at CERN, Fermilab and Santa Barbara. • About 100 ready from a total of 5510. • Plans for module production at HIP had to be abandonned in 2001 due • to lack of infrastructure and funds • in Finland.

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