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Title: Performance of a tracking telescope for crystal channeling measurements and evaluation of the CMS Binary Chip
Author: Ferguson, William
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 2013
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The High-Luminosity LHC (HL-LHC) foresees an increase in luminosity towards 5x10^34 cm^-2 s^-1 over the next decade. Increased luminosity will have heavy implications for the CMS Tracker, due to increased detector occupancies, trigger rates and radiation damage. Notable areas for development in the Tracker include sensor and readout systems. Additionally, CMS will for the first time require the use of Tracker information in the Level-1 Trigger. A beam telescope has been designed and constructed for the primary purpose of testing future detector modules for upgrades of the CMS Tracker. The telescope is based on the readout chain of the CMS Tracker, and measures the trajectories of charged particles with the use of five pairs of orthogonal silicon strip sensors. Beam tests have been carried out in the H8 proton beamline at CERN through the UA9 collaboration, which looks into the phenomenon of crystal channeling as a possible means of improved beam collimation. The telescope was found to have good performance and has allowed the observation of crystal channeling in a variety of crystals. The telescope has also been tested in a heavy ion beam at the H8 beamline. Large signals in the telescope sensors have been shown to momentarily saturate the APV25 readout chip, which has led to the need for modified hit reconstruction. The telescope has been shown to perform sufficiently well to allow measurements of crystal channeling of heavy ions. The increased data rates at the HL-LHC and the need for compatibility with existing systems necessitate the use of a binary, unsparsifed chip for the readout of silicon strips in the upgraded CMS Tracker. The CMS Binary Chip is a prototype of such a chip, and has been tested in conjunction with the beam telescope at the H8 proton beam. The chip has been shown to perform well.
Supervisor: Hall, Geoff Sponsor: Science and Technology Facilities Council
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available