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XXV Workshop on Recent Developments in High Energy Physics A. Markouizos

The High Voltage Distribution System of the ALICE Transition Radiation Detector P. Mantzaridis, A. Markouizos, P. Mitseas, A. Petridis † , S. Potirakis, M. Tsilis, M. Vassiliou Athens University. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos.

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XXV Workshop on Recent Developments in High Energy Physics A. Markouizos

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  1. The High Voltage Distribution System of the ALICE Transition Radiation Detector P. Mantzaridis, A. Markouizos, P. Mitseas,A. Petridis†, S. Potirakis, M. Tsilis, M. VassiliouAthens University XXV Workshop on Recent Developments in High Energy Physics A. Markouizos

  2. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 2 Outline: Introduction: ALICE TRD Hardware: HVDS Description Requirements – Specifications Control Software: Embedded Software PVSS Installation of the Prototype System Performance Current Status & Future Plans

  3. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 3 TRD

  4. 540 individual modules:18 azimuthal sectors-supermodulesEach supermodule contains: 5 detector stacks of 6 module layers each Each detector module consists of a radiator and readout chamber. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 4 Introduction: ALICE TRD TRD The readout chamber contains a conversion and drift gas volume and a wire amplification region with cathode pad readout.

  5. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 5 Hardware : H.V.D.S. Description • We have designed a Master/Slave power supply distribution system to provide the required anode and drift voltageto the ALICE TRD readout chambers. • The system will be used to switch on and off, monitor (on the nA level), protect, and regulate (leverage of 1000 Volts) from a common ceiling voltage

  6. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 6 Hardware : H.V.D.S. Description II High Voltage Distribution System: Simple design Reduced complexity Reduced number of components Very low current circuits: Meet ALICE TRD requirements High resolving power (pA), fast response Increased Lifetime, short circuit protected Two Enfolded Voltage stabilizing Systems Shunt regulator : Reduces output ripple Software regulation : Gives very long term stability

  7. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 7 Hardware: H.V.D.S. Block diagram

  8. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 8 Hardware: H.V.D.S. Card Image: 1700 components Edw na mpei fwto tis pisw pleuras

  9. Crate 01 Module 01 Card 01 Card Channel 01 Card 02 Channel 02 μCpu . . . . . Channel 03 Card 05 Channel 04 Channel 05 Module 02 Channel 06 Module 03 Communication Unit XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 9 Hardware : H.V.D.S. Architecture • Architecture Similar to ALICE TRD layout

  10. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 10 Hardware : H.V.D.S. Specifications Anode System: Dynamical range 900 – 1900 V Max. current 7 uA Drift System: Dynamical range 1450 – 2500 V Max. current 250 uA Both Systems: Output Channels 540 ramp-up rate 1-30 V/s ramp-down rate 1-100 V/s voltage stability DV < 50 mV /24h response time < 50 ms

  11. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 11 Control Software : Embedded Software Software Regulation : Voltage Stability <0.005% /24h Smart device management Increased Speed Protections: Temperature, Current, and Voltage checks Response Time ~20ms Self Diagnostics: Hardware Monitoring, Hardware Error Detection 2 Control Interfaces, CAN Interface (P.V.S.S. & Final Set-up) Serial Interface (Development, Debugging, Tests)

  12. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 12 Control Software: PVSS Introduction Upper level control is attainable through PVSSPVSS is a SCADA* software, and is used for control of all ALICE subsystems Special Control Panels have been developed for each Structural unit of the HDVS (channel, card, module) Gives access to system settings at channel level Allows massive control of all the HVDS channels *Supervisory Control And Data Acquisition

  13. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 13 Control Software: PVSS Channel Panel

  14. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 14 Control Software: PVSS, Card Panel

  15. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 15 Control Software: PVSS Module Panel UNDER DEVELOPMENT

  16. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 16 Installation of The Prototype: Surface Tests October 2006 at CERN: taking final tests on detector before the installation in the pit.

  17. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 17 Installation of The Prototype: Surface Tests Tests have shown flawless behavior… • 6 anode channels • HV set at 1450 V

  18. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 18 Installation of the Prototype: Final Position One Anode & one Drift System to power the first TRD supermodule are already installed and tested in final position.

  19. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 19 System Performance:Long Term Voltage Stability Test • ΔV (FWHM) < 30 mV • ΔV / V < 1.6 E-5

  20. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 20 System Performance:Voltage Stability Test on the Detector at HD (25-08-2006)

  21. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 21 System Performance Current Stability Test on the Detector at HD (26-08-2006) Operating 3 channels from one HV Anode Card

  22. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 22 Current Status & Future Plans First Prototypes are installed and operating at CERN Waiting for production of 30 anode and 30 drift HV Cards along with all peripherals to power 6 TRD Supermodules The systems have to be tested on the detector and finally installed at CERN

  23. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 23 End Thank you!

  24. XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 24 End Back Up

  25. something as radiator charged particle X-ray XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 25 Introduction: Transition Radiation Detector Charged particle at high Lorentz factor (g > 1000) passing through the boundary between material and vacuum emits the photon (X-ray at few ~few 10 keV).

  26. Cosmic Data took at CERN XXV Workshop on Recent Developments in High Energy Physics A. Markouizos p. 26 Installation of The Prototype: Surface Tests Anode & Drift Prototype Systems have operated successfully with the final TRD supermodule

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