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“Monitoring System for the Heaters used in the ATLAS Inner Detector Evaporative Cooling System”

“Monitoring System for the Heaters used in the ATLAS Inner Detector Evaporative Cooling System”. Suzie Sheehy University of Melbourne Australia. Suzie Sheehy CERN Summer Student Program 11 th August 2005. Overview. Where project fits in Inner Detector Evaporative Cooling System

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“Monitoring System for the Heaters used in the ATLAS Inner Detector Evaporative Cooling System”

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  1. “Monitoring System for the Heaters used in the ATLAS Inner Detector Evaporative Cooling System” Suzie Sheehy University of Melbourne Australia Suzie Sheehy CERN Summer Student Program 11th August 2005

  2. Overview • Where project fits in • Inner Detector • Evaporative Cooling System • Heaters • Details • Progress • Still to come… Suzie Sheehy CERN Summer Student Program 11th August 2005

  3. Monitor Panel (PVSS) Where the Project fits in… CAN-bus + ELMB Heaters Evaporative Cooling System ATLAS detector HIGGS & SUSY Inner Detector Suzie Sheehy CERN Summer Student Program 11th August 2005

  4. Inner Detector The ATLAS Detector Suzie Sheehy CERN Summer Student Program 11th August 2005

  5. Evaporative Cooling System • Evaporative fluorocarbon (C3F8) system cools the Pixel and SCT volume inside thermal enclosure • System has to remove about 60kW of heat from detector • Like a normal refrigerator Compressor Condenser Superheated Vapor State Liquid at room temperature Heater Capillaries Expands to saturated state Detector Structure Residual Liquid Suzie Sheehy CERN Summer Student Program 11th August 2005

  6. Pixels: 88 Barrel: 44 EndCap: 36 x 2 Total = 204 Heaters Heaters Heater unit • Need a system to: • monitor the temperature, current and interlock status of each heater. • provide alerts when approaching abnormal or unacceptable values • control to rectify problems (provided by a different system) 3 x ELMBs Suzie Sheehy CERN Summer Student Program 11th August 2005

  7. ELMB (Embedded Local Monitor Board) x 3 HEATER The Age Old Battle: Software vs. Hardware Monitoring panel made in PVSS based on C code CANbus card in computer Suzie Sheehy CERN Summer Student Program 11th August 2005

  8. The Monitor Panels Suzie Sheehy CERN Summer Student Program 11th August 2005

  9. Progress… • Basic Panels • Format for displaying 204 at the same time • Basic read/write ability to hardware • Software/Hardware interface Still to come… Heaters Test system Readout And much more! Calibration Connection Datapoints History Alarm systems Suzie Sheehy CERN Summer Student Program 11th August 2005

  10. The End!!Any Questions?? Suzie Sheehy CERN Summer Student Program 11th August 2005

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