Tests und Inbetriebnahme der LHCb Outer Tracker Front-end Elektronik und eine Studie zur Abschätzung des Untergrundes im Zerfall $B^{0}_{s} \to J\Psi \Phi$

The readout electronic of the LHCb outer tracker measures the drift time of a straw tube. The front-end electronic consists of three radiation hard chips. The ASDBLR preamplifier amplifies and discriminates the charge puls produced by the drift chamber. The OTIS-TDC chip measures the drift time every 25 ns on 32 detector channels. The generated data is send via an optical link with 1,6 GBit/s, making use of the GOL chip. The main part of this thesis is dedicated to the testing and commissioning of the outer tracker front-end electronic. Altogether three test systems were developed and operated. The first test system was built to thoroughly check the features of the OTIS-TDC chips on the wafer. The quality of the OTIS board and GOL-Aux board production was checked with another test system. The front-end electronic was also combined and tested to the LHCB readout chain. One of the main goals of the LHCb experiment is the measurement of the CP-violating phase Phi_s. It can be measured by using the golden decay mode Bs -> J/Psi Phi. It is vital to have a good knowledge about the background for this decay in order to extract the phase. In this thesis a study was performed to overcome the current limitations due to low Monte-Carlo statistics in this area.