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Construction and performance of the ATLAS SCT barrels and cosmic tests

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  1. Tez No: 400148
  2. Yazar: MELAHAT BİLGE DEMİRKÖZ
  3. Danışmanlar: DR. ANTHONY WEİDBERG
  4. Tez Türü: Doktora
  5. Konular: Fizik ve Fizik Mühendisliği, Physics and Physics Engineering
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 2007
  8. Dil: İngilizce
  9. Üniversite: University of Oxford
  10. Enstitü: Yurtdışı Enstitü
  11. Ana Bilim Dalı: Belirtilmemiş.
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: 227

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Özet (Çeviri)

ATLAS is a multi-purpose detector for the LHC and will detect proton-proton collisionswith center of mass energy of 14TeV. Part of the central inner detector, theSemi-Conductor Tracker (SCT) barrels, were assembled and tested at Oxford Universityand later integrated at CERN with the TRT (Transition Radiation Tracker)barrel. The barrel SCT is composed of 4 layers of silicon strip modules with twosensor layers with 80?m channel width. The design of the modules and the barrelshas been optimized for low radiation length while maintaining mechanical stability,bringing services to the detector, and ensuring a cold and dry environment. The highgranularity, high detector efficiency and low noise occupancy (< 5×10?4) of the SCTwill enable ATLAS to have an efficient pattern recognition capability.Due to the binary nature of the SCT read-out, a stable read-out system andthe calibration system is of critical importance. SctRodDaq is the online softwareframework for the calibration and also the physics running of the SCT and has beendeveloped and tested during construction and commissioning of the detector withcosmics. It reliably measures the SCT performance parameters for each of the 6.3×106channels in the SCT, identifies defects and problematic modules and writes them toan offline database for access from Athena, the ATLAS offline software framework.This dataflow chain has been exercised during the cosmics run at CERN, where a5× 105 cosmics sample for the combined SCT and TRT detectors was collected witha scintillator based trigger. It is now being commissioned in the ATLAS pit.

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