Abstract of the master's thesis

Digital Aerial Photography Production

Katja Nummiaro
Helsinki University of Technology
Department of Surveying
Professorship: Photogrammetry
Supervisor: Prof. Henrik Haggrén
Instructor:  Ilkka Niini, Lic.Sc.(Tech.), and Christian Lasseur, M.Sc.(Tech.)

Date: 3.12.1998
Number of pages: 65

This masterís thesis was undertaken within the laboratory of Photogrammetry and Remote Sensing in the Department of Surveying, Helsinki University of Technology and the main research done in the Positioning Metrology and Surveying Group, CERN (European Laboratory for Nuclear Physics), Switzerland.

The Large Hadron Collider (LHC) will be assembled in CERN at 2005. It will use the old Large Electron Positron (LEP) beam line but have new detectors sensoring some attributes of collided particles. The Compact Muon Solenoid (CMS) is one of the new detectors. The assembly of the CMS magnet and barrels around are controlled by photogrammetry. This thesis consists of two simulation projects of one CMS-barrel alignment. The final goal of the thesis is to find the most suitable working conditions for the real CMS magnet measurement project in the future and especially check the capability of the digital photogrammetric system of CERN for the barrel alignment. The precision required is 1-2 mm within a structure of 3x16x16 m. Studies of the calculations were made in the end of the both simulations and the practical ways of barrel measurement found, like the number of targets and cameras and the use of distances in bundle adjustment. These results will be used for new projects in CERN.

Keywords: Barrel alignment, image recording system, simulation and mock model

Language: English