Study of the BIS-MDT /ATLAS Chambers with Cosmic Rays

This thesis is a study of data obtained from cosmic tests of BIS chambers. BIS chambers belong to the muon sub detector of ATLAS experiment at the CERN laboratory in Geneva. Moreover BIS chambers are Greek implemented chambers from a fruitful collaboration of University of Athens (construction of tubes), Na- tional Technical University of Athens (quality assurance and quality Control) and University of Thesaloniki (final assembly). From September of 2000 to the April of 2004 the Greek muon team tried its best to implement the 112 BIS-MDT chambers. The study if this thesis, is a small ring in this chain of completion steps and connects previous work and installation procedures programmed for April of 2006. Briefly, this thesis gives in the first chapter information about the CERN lab- oratory, the ATLAS experiment and the BIS-MDT chambers. In chapter 2, pre- sented some very elementary operation principles of BIS detection unit, the MDT tube. In chapter 3, an extensive study of TDC spectrum is done and in parallel a check of the homogeneity of BIS sub detector system. Chapter 4 follows with the same analysis but for the ADC spectrum connected with the charge. Finally chapter 5 has to do with several optical representations concerning BIS chambers, cosmic muons and work of this thesis.