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The Control of the TRD-HVDS A.Petridis , M. Vassiliou Athens University

The Control of the TRD-HVDS A.Petridis , M. Vassiliou Athens University. ALICE-DCS Workshop CERN, March 2005. TRD. 23. 3 Crates. 1. 50. 540. 540 18*(12+18). 1080. 1. 180. ?. 1..2. 540. 1..50. 1. ?. 5?. [FSM?]. Marc R. Stockmeier, 25/05/04. Database(s).

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The Control of the TRD-HVDS A.Petridis , M. Vassiliou Athens University

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  1. The Control of the TRD-HVDSA.Petridis , M. VassiliouAthens University ALICE-DCS Workshop CERN, March 2005

  2. TRD 23 3 Crates 1 50 540 54018*(12+18) 1080 1 180 ? 1..2 540 1..50 1 ? 5? [FSM?] Marc R. Stockmeier, 25/05/04 Database(s) PVSS II PVSS II PVSS II Control room (ACR) OPCclient DIMclient User interface Ethernet [ST/CV] [GWG] PVSS II PVSS II PVSS II PVSS II OPC client OPC client PVSS II ISEG OPCserver Wiener OPCserver SchneiderOPCserver (?) DIMclient DIMclient Modbus/TCP PCI-CAN PCI-CAN C C E E E E C ISEG PLC DIMserver DCS board EthernetSwitch PLC E C ELMB Gas Controlled Distribution Box Wiener CoolingPlant HV-drift LV E Data optical DIMserver Detector Detector DCS board Detector Detector High Voltage Low Voltage FEE Detector Cooling Gas system

  3. Functionality of the HVDS A Master/Slave HV distribution system will deliver the required voltages to the TRD readout chambers: Drift HV: 540 ch. ~ -2.5 kV 170μA/ch (max)ΔΑ/Α ~ 40nA/ch Anode HV: 540 ch. ~ +1.6 kV 7 μΑ/ch (max) ΔΑ/Α~ 2nA/ch

  4. Concept of connecting the High Voltage Distribution System to DCS-Bord • Layout of a Rack: • Layout of a Crate: • Layout of a Module:

  5. Architecture of the CAN network inside one rack: Module 0 Card 0 Card 1 Card 2 Card 3 Module 1 (Internal architecture similar to module 0) Card 4 Module 2 (Internal architecture similar to module 0) Crate 1 (Internal architecture similar to crate 0) DCS Board 1 (Optional) DCS Board 0 Crate 0

  6. Control Parameters • HVDS (card) status set, read • card temperature read, alarm • card input voltage read • channel status set, read • desired voltage/current set, read • actual voltage/current read • max allowed voltage/current set, read • max voltage/current is exceeded read, alarm • start ramping up/down set • stop ramping set

  7. ramp speed up/down set, read • max allowed ramp speed set, read • time of periodically trans. V, Ion normal operation set, read • time of periodically trans. V, I while ramping set, read • action on trip (kill, enable, disable) set • order all actual data for one channel (status messages) set

  8. Outlook • Update the TRD – URD. • Implement the FSM to continue the development of the HVDS control according to the standard HV state diagram. hierarchy : device and detector alarms : different alarm severity conditions are foreseen

  9. Outlook (cont.) • Integrate the HVDS control in the TRD control system.

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