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Rod Cooling Solution for ALICE DCS: Presentation of TPC Resistor-Rod Cooling System Results

This presentation showcases a resistor-rod cooling solution for ALICE DCS, presenting initial URD inputs and test outcomes. The system includes two rods per side producing 25W each, maintaining temperature stability within ±0.1oC in the drift volume. It features a closed gas cooling circuit cooled by 10m3/h-20m3/h CO2, conditioned by heaters. The control part ensures starting conditions check, conditioning process control (PLC/PID), proactive measures for uncontrollable temp. increases, user interface provision (PVSS II), monitoring of results and status, and results archiving. The system aims for 0.4oC temp. accuracy in the rod to achieve 0.1oC accuracy in the surrounding gas volume. SIEMENS OPC server tested successfully, prototype tests completed with SIEMENS S7-300 for monitoring, and next steps involve PID loop implementation for conditioning, PVSS II integration, alternative system solutions investigation (SCHNEIDER), and HV and current monitoring integration.

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Rod Cooling Solution for ALICE DCS: Presentation of TPC Resistor-Rod Cooling System Results

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Presentation Transcript

  1. Presentation of a TPC Resistor-Rod Cooling Solution in the ALICE DCS Presentation based on first URD inputs and test results. Tarek ben Ahmed

  2. Introduction • Two rods per side • Each Rod produces 25W • Temperature stability inside the drift volume  0.1 oC • Closed gas cooling circuit • Cooled by 10m3/h-20m3/h CO2 • CO2 has to be conditioned by heaters

  3. Controls Part • Check starting conditions (also with subsystems) • Control of conditioning process (PLC/PID) • Take action in case of uncontrollable temp. increase • Provide user interface (PVSS II) • Monitor results and status (PVSS II) • Archive results

  4. Resistor Rod Cooling System

  5. Control Principle of R-Rod Cooling LAN Fieldbus

  6. Results • 0.4 oC temp. accuracy needed inside the rod to obtain 0.1 oC accuracy in the surrounding gas volume (low transition in gas volume) • SIEMENS OPC server tested successfully • Prototype tests done with SIEMENS S7-300 (only reading and monitoring)

  7. Next Steps • Implementation of conditioning process (PID loop needed => PID self-tuner ?) • Implementation of PVSS II • Investigation of alternative system solutions (SCHNEIDER) • Integration of HV and current monitoring system

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