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ATLAS MDT Power Supply DCS

Explore the development of an Automatic Finite State Machine (FSM) for monitoring High and Low Voltage Power Supplies of MDT chambers in the ATLAS project. Learn about PVSS II, FSM creation, ActiveX display, and current project status.

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ATLAS MDT Power Supply DCS

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  1. ATLAS MDTPower SupplyDCS Anastasios Iliopoulos 15/08/2006

  2. Contents • Power Supply of MDTs (High & Low Voltage) • ATLAS DCS • PVSS II • FSM • Project Panels & Sub-panels • Dynamic FSM Creation • ActiveX display of the FSM • Today’s status of the project • References

  3. Power Supply of MDTs • Two (or one) multilayers of drift tubes • High Voltage side • Readout side • Each multilayer is operated by a separate high voltage supply (3kV) • Low voltage (5V) is provided to the readout side of each chamber

  4. Detector Control System (DCS) ATLAS Track Detector Hadronic Calorimeter Muon Spectrometer Electromagnetic Calorimeter CSC MDT RPC Power Supply Monitoring Temperature, Magnetic Field High Voltage Low Voltage

  5. PVSS II • PVSS II by ETM • Procedures for: • Communication with hardware • Storing data • Warnings & Errors • Built-in programming language (C++) • Graphic Editor • User abilities • Create his personal application • Send and receive data • Monitor and manage the detector

  6. Finite State Machine (FSM) • Michail Bachtis & Anastasios Iliopoulos: PVSS project for control & monitoring HV & LV for MDT chambers • Based on a FSM • Depending on the state or status of each node, is returned a message and the necessary action is executed Over Current Recovery TRIP ON RAMP UP RAMP DOWN HW ERROR OFF

  7. Created using C++ and some built-in procedures of PVSS DCS team of ATLAS developed a special framework

  8. Sub-panels

  9. My Work – Part I: Dynamic FSM Creation • Automatic FSM generation • Adds chambers to FSM using the desired name and number of HV & LV channels • Sets automatically all necessary parameters • Capability of reading channel parameters from a simple text file • About 900 lines code

  10. My Work – Part II:ActiveX display of the FSM • ActiveX object created with programming in Visual Basic • Displays plugged chambers sorted under logical units • Displays current state or status of each chamber using colour code • Supports colour propagation to the parent levels • About 300 lines code

  11. Today’s status of the project • 3 PCs will be used: • Barrel A & C side • EndCap A & C side • “Supervisor” PC • At this time the project is tested, monitoring the LV supply of chambers in sector 13

  12. References The End • Bachtis Michail, “Development of automatic control system for the MDT-BIS detector” • Bachtis Michail, “Update on the MDT Power Supply DCS” • “ATLAS Muon Spectrometer - Technical Design Report”

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