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Inner Detector Material Description

Stephen Haywood provides a comprehensive update on the materials used in the Inner Detector (ID) at the CERN ATLAS experiment, detailing the progress up to PPF1 and highlighting the need for services tracking improvements. Various areas, such as Pixels, SCT, and TRT, are reviewed, with notes on the current status and concerns regarding data integrity and sources. The document stresses collaboration among team members to review responsibilities, data accuracy, and future modeling of the beampipe area. The update indicates potential areas for improvement and further clarification needed regarding ID Services.

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Inner Detector Material Description

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  1. Inner Detector Material Description Stephen Haywood Rutherford Appleton Lab

  2. Status PP0 PPF1 • I thought we were in good shape – various people have worked on Material Description over the years. • Pixels: • Complete in Pixel Tracking volume; need Services from PP0 to PPF1 (|h| > 2.0) • SCT: • Complete up to and including PPF1 • TRT: • Complete up to and including PPF1 • Beampipe: • OK – although could be improved by merging 2 layers into 1 • https://twiki.cern.ch/twiki/bin/view/Atlas/InDetGeometryUpdate Stephen Haywood – Simulation WG

  3. PPF1 Stephen Haywood – Simulation WG

  4. SCT Stephen Haywood, Alessandro Tricoli, Pat Ward Stephen Haywood – Simulation WG

  5. Beyond PPF1 ? This is an ID Responsibility (rather than Pix/SCT/TRT) and is outside the ID volume. Was being looked at by a student (from LAr). There is a note: ATL-LARG-INT-2009-002 Several of us have looked at this note and cannot understand what has been done. The SCT (EC) PPF1’s & Heaters were implemented. There is the possibility that TRT PPF1’s were implemented twice (?!?). Some Cables/Pipes may have been implemented ....but unclear. Author has left ATLAS. In retrospect, not obvious where info was coming from and who was in charge. I have very little confidence in what has been done. Stephen Haywood – Simulation WG

  6. Material distribution for ID services in PPF1 Critical area is PPF1 (triangular section in drawing) Don’t have all Patch Panel numbers! - S. Haywood has provided numbers for SCT end-cap (34501.65 g). Thanks! - Don’t have Pixel and TRT so made a guess based on number of cables with respect to SCT!

  7. What now ? Andrea Bocci needs to understand status of TRT PPF1. I need to speak to Sigi Wenig and Andrea Catinaccio who were responsible for ID Services. Adele asked for Eng Drawings ... Do you really want these ? Who will implement ID Services ? I assume ID ! If we want to improve model of Beampipe (not obvious that it is necessary), Grant would like some help. Stephen Haywood – Simulation WG

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