11

Integration of the HV Distribution SystemIntegration of the HV Distribution System to the First TRD Super Module to the First TRD Super Module

P. Mantzaridis, A. Markouizos, P. Mitseas,P. Mantzaridis, A. Markouizos, P. Mitseas,A. Petridis, S. Potirakis, M. Tsilis, M. VassiliouA. Petridis, S. Potirakis, M. Tsilis, M. Vassiliou

Athens UniversityAthens University

Workshop on the DCS for the TRD Workshop on the DCS for the TRD Heidelberg, January 2007 Heidelberg, January 2007

2

Outline

• Installation of the first HVDS at CERN• Specifications of the HVDS• Control of the HVDS• Performance of the HVDS• Current Status (hardware, software)

3

Installation of the first HVDS at CERN (October 2006)

4

Installed Hardware at CERN

• 1+1 Crates (positions: 007_9, 007_16)• 1+1 DCS Boards (with auxiliary DCS cards)• 1+1 Backplanes

• supplies the Master HV to each card

• distributes the isolated LV to the active components

• enables the CAN bus communication

• 5 Anode + 5 Drift Cards• 3+3 isolated LV Auxiliary Power Supply Cards• LV Power Supplies (5V, ±12V)

5

Specifications of the HVDS

• Anode Voltage- dynamical range 900 – 1900 V- ramp-up rate 30 V/s- ramp-down rate 100 V/s- voltage stability V < 50 mV- voltage readout 10 Hz- max. current 7 A- response time < 50 ms

(e.g. overcurrent)

6

Specs. (cont)

• Drift Voltage- dynamical range 1450 – 2500 V- ramp-up rate 30 V/s- ramp-down rate 100 V/s- voltage stability V < 50 mV- voltage readout 10 Hz- max. current 230 A- response time < 50 ms

(e.g. overcurrent)

7

Control of the HVDSControl of the HVDS

8

The TRD Overview Drawing

9

DCS Board 0 Crate 0

DCS Board 1(Optional)

Module 2(Internal architecture similar to module 0)

Crate 1(Internal architecture

similar to crate 0)

Module 0Card 0

Card 1

Card 2

Card 3

Card 4

Module 1(Internal architecture similar to module 0)

Architecture of the CAN network

10

HVDS Card Control Panel

11

ISEG Control Panel

(G. Tsiledakis)

HVDS Channel Control Panel (Test on the SM 1 at CERN, 8/10/2006)

13

Ramping and Status Procedures

14

Error Messages• Voltage Errors

Over Voltage message: max allowed voltage is exceeded action: voltage is set to the max allowed value

Under Voltage message: min allowed voltage is out of range action: voltage is set to the max allowed value

Limits Error message: set value is out of limits action: limit is set to the default value

• Current Errors (Hardware Error) Over Current

alarm: max allowed current is exceeded or a short-circuit occurred

• Ramping Errors Ramping Rate

message: max allowed rate is exceeded action: rate is set to the max allowed value

Ramping End Value message: end value is out of limits Action: value is set to the max allowed

Limits Error message: set value is out of limits action: limit is set to the default value

15

HV State Diagram

READY

GO_INTERMETIATEGO_CONFIGURING_OFFGO_READYRESET

OFF

INTERMEDIATE

RAMP_DOWN_HIGH

RAMP_DOWN_LOW

RAMP_UP_HIGH

RAMP_UP_LOW

RAMP_UP_FULL

GO_OFFGO_READYGO_CONFIGURING_INTRESET

GO_OFFGO_INTERMEDIATEGO_CONFIGURING_READYRESET

CONFIGURING_INT

RAMP_DOWN_FULL

RESET =RESET =Majority =

CONFIGURING_READYCONFIGURING_READY

CONFIGURING_OFFCONFIGURING_OFF

(G. De Cataldo)

16

Control of the HVDSPerformance of the HVDS

17

Voltage Stability Test on the Detector at HD (25-08-2006)

Voltage Measurements

18

Current Stability Test on the Detector at HD (26-08-2006) Operating 3 channels from one HV Anode Card

Current Measurements

19

Voltage Stability Measurements on the SM1 at CERN (9/10/2006)

• 6 anode channels

• HV set at 1450 V

20

Voltage Resolution Measurement on the SM1 at CERN (9/10/2006)

•Anode Channel •HV set at 1450 V

21

Long Term Voltage Stability Test (Athens - Jan 2007)

•ΔV (FWHM) < 30 mV

•ΔV / V < 1.6 E-5

22

Control of the HVDSCurrent Status

23

Hardware

• New Schroff Crate + LV Power Supply• Two parallel orders to Q-Print • 2 Anode + 2 Drift cards for testing purposes • 30 (+10) Anode + 30 (+10) Drift cards to power 6 Supermodules + 5 Backplanes, Auxiliary DCS cards, connector card, Isolated PS cards• Define testing procedure• Magnetic field tests of a full crate at CERN• Installation of the 2+2 HV Crates at P2• Documentation

24

• Archiving • Amanda Server Manager (AliRoot) • ORACLE Database• Alarm Handling• Recipes and logical views• Integration to the TRD-DCS • PVSS project according to the ALICE DCS guidelines • Implementation of the FSM• Installation of final software project at CERN• Documentation

Software

25

Thank you!