TPC Detector Control System

1
TPC Detector Control System
2
TPC sub-detectors and sub-systems
TPC
ROC
Field cage
Th. Screen
Laser
Gas
Equip.
High Voltage
Cooling
High Voltage
laser
crate
Low Voltage
Cooling

Cooling
I monitor
FEE
Pulser
3
High Voltage Read Out Chamber

• ISEG
• Solution available (work ongoing)
• Prototype
• Connection to hardware from PVSS

CANbus(18 nodes)
ISEG
3 crates
ISEG
ISEG
PX
288 channels
UX
TPC
4
Low Voltage ROC

• Wiener
• Solution available (work ongoing)
• Prototype
• Connection to hardware from PVSS

CANbus(22 nodes)
Wiener
22 crates
Wiener
Wiener
PX
UX
808 channels
TPC
5
Cooling Read Out Chamber/FEE

• Plant
• Common effort (ST/CV)
• Prototype Readout Cooling
• Study thermal behavior
• Investigate front-end solutions

PX
UX
Ethernet
plant
PLC
1 PLC
44 channels
Heater
PLC
1-2 PLCwith remote I/O ?
T
TPC
6
Front End Electonic

• Front End Electronics
• Voltage regulation
• Temperature
• Status
• Depending on implementation of communication

PX
UX
Profibus, Ethernet ?
RCU
216 RCUs
RCU
RCU
Local private bus
FEC
4356 FECs
FEC
FEC
7
Gating Grid pulser

• New item
• Under discussion

Profibus ?
PX
UX
Pulser Crate
8
High Voltage Fieldcage

• FUG
• Interface to be studied
• Prototyping
• HV power supply
• Current monitor

RS232, Profibus?
FUG
1 crate
PX
1 channel
UX
TPC
9
Cooling Fieldcage

• Investigating of final solution
• Depending on tests
• Prototyping
• Resistor rod cooling

PX
UX
Ethernet
4 channels
Heater
PLC
1 PLC
T
TPC
10
Cooling Thermal Screen
readout

• Similar to FEE cooling

PX
UX
Ethernet
plant
PLC
1 PLC
18 channels
Heater
PLC
1-2 PLCwith remote I/O ?
T
TPC
11
Laser system ?

• Integration into TPC DCS

Fieldbus ?
PX
UX
12
Crate control

• Common to Alice

CANbus ?
Crate(s)
PX
UX
Crate(s)
13
Gas system

• Gas working group
• Parameters published to TPC DCS
• Status
• Alarm handling
• Flow, pressure, mixture (defined by TPC)
• Additional sensors like Drift velocity monitor

14
Next Step Finite State Machines
ECS
Control Units
...
LHC
DCS
...
...
TPC
TRD
Abstract levels
Commands
Status Alarms
FC
ROC
HV
Cool.
LV
...
Crate
Device Units
Crate
Crate
To Devices (HW or SW)
15
DCS Planning
16
DCS planning

• September 2002
• Electronics (FEC) tests
• Basic HV and LV DCS functionality
• February 2003
• Electronics (RCU) tests
• Basic HV and LV DCS functionality, evolving based
  on operational experience
• DCS connection to RCU
• Will include test-beam

17
DCS planning

• April 2004
• Pre-installation at SXL2
• Card by card, chamber by chamber, sector by
  sector tests
• HV, LV, cooling, gas DCS with increasing
  functionality and integration
• 2005
• Cosmic running with TPC at surface
• Full TPC DCS to allow (unattended) cosmic running
• 2006
• Installation and commissioning

18
Summary

• URD for most sub-detectors and sub-systems
• Hardware
• commercial solutions if possible (PLC)
• common LHC solutions (ELMB)
• Hardware SCADA interfaces
• commercial solutions if possible (OPC server)
• Integration of Laser System
• Solution to interface to Fieldcage HV PS to be
  studied
• Solution for FEE controls depend on choice of
  communication
• Final solution on cooling depends on prototype
  results
• Started discussing operational requirements (FSM)

19
DCS meeting at GSI 27. September

• alice-tpc-dcs_at_cern.ch