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This thesis presents the work carried out in the testing of the ATLASPhase-II Upgrade electronic systems in the future strips tracker after 2023, tobe installed for operations in the HL-LHC period. The high luminosity andnumber of interactions per crossing that will happen after the HL-LHC startsrequire a complete replacement of the ATLAS tracker. The systems that have beendefined for the Phase-II Upgrade will be designed to cope with that increasedradiation and have the right granularity to maintain the performance withhigher pile-up.  In this thesis I present results on single modules and larger structurescomprising multiple modules.  In the context of the current ATLAS Semiconductor Tracker studies, I presentan analysis of the data taken by the detector from the beginning of operationin 2010 until the first Long Shut-down in 2013. The analysis consists of anenergy loss study in the Semiconductor Tracker, a task the detector was notdesigned to perform.  However, the availability of the Time-over-Threshold of the signals generatedby particles traversing the detector elements allows an estimation of thecharge deposited by the particles. This calculation of the energy loss istypically used to perform particle identification, a feature that is usuallynot required from the tracker. In addition, I present a study that proposes theuse of this energy loss calculation as a means of tracking radiation damage inthe silicon.

A Silicon Strip Detector for the Phase II High Luminosity Upgrade of the ATLAS Detector at the Large Hadron Collider