HVDS Status Report P' Mantzaridis, A' Markouizos, P' Mitseas, A' Petridis, S' Potirakis, M' Tsilis,

1
HVDS Status Report P. Mantzaridis, A.
Markouizos, P. Mitseas,A. Petridis, S.
Potirakis, M. Tsilis, M. VassiliouAthens
University

• ALICE TRD Meeting
  Rolandseck, March 2007

2
Outline

• HVDS Hardware
• Prototype system at P2
• Control Software
• Testing of the HVDS
• Installation at P2

3
HVDS Hardware

• Production _at_ q-print
• 2 Anode 2 Drift HVD Cards
  (delivered, 30/3)
• Backplanes (7) (April 1st week)
• Aux. DCS Cards (7) (April 1st
  week)
• Front panel cards (7) (April 1st
  week)
• Transformer boards (35) (April 2nd week)
• (2 HVD cards 3 transformers)
• 40 Anode 40 Drift HVD cards
  (end of April)
• 4 Schroff Crates ordered (April 2nd
  week)
• LV Power Supplies ordered (April 1st week)
• (5V, 12V, -12V)

4
HVDS Hardware (cont.)

• Connectors (delivered)
• Cables (April 2nd week)
• Internal cables (141 / crate)
• Communication cables (6 / crate)
• LV cables (4 / crate)
• Mechanical Parts (April 3rd week)
• Transformers shielding
• Cover grids for the crates
• Schroff crates - front panel customization

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LV Power Supplies

• Requirements
• Output data
• Output 1 5V 7A min
• Output 2 12V 1.5A min
• Output 3 -12V 0.7A min.
• Linear mode

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The Prototype HVDS at P2

• System is in operational state
• Safety documents submitted
• Production of blinds to close the crates
• Safety inspection

7
Control Software

• Intercom Layer
• completely removed, PVSS tested
• PVSS panels
• generic panels for Channel, Card and Module
  exist
• new module panel under development
  (April 1st week)
• ISEG control
• crate tested successfully with CAN control
  software and PVSS panels
• implementation of updated PVSS panels
  needed (April 1st week)
• Local archiving in PVSS
• already exists
• Alarms
• over-current, over-voltage exist in channel
  level
• need to be implemented to higher levels
  (April 2nd week)
• over-temperature alarm need to be added

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Control Software (cont.)

• FSM
• updated HV state diagram is implemented
• mew FSM tree is under development
  (April 1st week)
• Logical Views
• need to be implemented (April 3rd
  week)
• OracleDB
• will be implemented after the sw
  installation at CERN (May 1st week)
• Recipes
• will be implemented after the sw
  installation at CERN (May 1st week)
• Integration to TRD (May 2nd week)
• Installation at CERN (May 3rd week)

9
Testing of the HVDS

• test procedure
• flow-chart defined,
• software under development
  (April 1st week)
• testing of 22 HVD cards
  (April 1st week)
• testing of
• backplanes, aux DCS cards, front panel
  cards (April 2nd week)
• testing of 4040 HVD cards
• in Athens and Heidelberg
  (May 2nd and 3rd week)
• magnetic field test of crates at CERN (May 4th
  week)

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Installation at P2

• Submission of new safety documents (May 3rd
  week)
• Safety inspection (May 4th
  week)
• Operation of 22 HVDS crates at P2 (end of
  May)

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Long Term Voltage Stability Test (Athens - Jan
2007)

• ?V (FWHM) lt 30 mV
• ?V / V lt 1.6 E-5

12
Control of the HVDS
Backup
13
Long Term Voltage Stability Test (Athens - Jan
2007)

• ?V (FWHM) lt 30 mV
• ?V / V lt 1.6 E-5

14
Integration of the HV Distribution System to the
First TRD Super Module P. Mantzaridis, A.
Markouizos, P. Mitseas,A. Petridis, S.
Potirakis, M. Tsilis, M. VassiliouAthens
University

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

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Outline

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

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Installation of the first HVDS at CERN (October
2006)
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Installed Hardware at CERN

• 11 Crates (positions 007_9, 007_16)
• 11 DCS Boards (with auxiliary DCS cards)
• 11 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
• 33 isolated LV Auxiliary Power Supply Cards
• LV Power Supplies (5V, 12V)

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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 DV lt 50 mV
• voltage readout 10 Hz
• max. current 7 mA
• response time lt 50 ms

(e.g. overcurrent)
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Specs. (cont)

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

(e.g. overcurrent)
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Control of the HVDS
Control of the HVDS
21
The TRD Overview Drawing
22
Architecture of the CAN network
23
HVDS Card Control Panel
24
ISEG Control Panel
(G. Tsiledakis)
25
HVDS Channel Control Panel (Test on the SM 1 at
CERN, 8/10/2006)
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Ramping and Status Procedures
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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

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HV State Diagram
(G. De Cataldo)
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Control of the HVDS
Performance of the HVDS
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Voltage Stability Test on the Detector at HD
(25-08-2006)
Voltage Measurements
31
Current Stability Test on the Detector at HD
(26-08-2006) Operating 3 channels from one HV
Anode Card
Current Measurements
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Voltage Stability Measurements on the SM1 at CERN
(9/10/2006)

• 6 anode channels
• HV set at 1450 V

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

• Anode Channel

• HV set at 1450 V

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Long Term Voltage Stability Test (Athens - Jan
2007)

• ?V (FWHM) lt 30 mV
• ?V / V lt 1.6 E-5

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Control of the HVDS
Current Status
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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 22 HV Crates at P2
• Documentation

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Software

• 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