3 June 2003 U. Frankenfeld 1

TPC Detector Control System

Status

3 June 2003 U. Frankenfeld 2

TPC sub-detectors and sub-systems

TPC

ROC Field cage Th. Screen Laser

High Voltage

Low Voltage

High Voltage

Cooling

I monitor

Cooling Laser

Alignment

FEE

Cooling

Pulser

Gas

Sys.

Drift

URD

Prototype

Production

3 June 2003 U. Frankenfeld 3

ROC Low Voltage

• Wiener PL 500– 5 channel/crate– 1 - 2 channels per voltage for FEE

• Prototype used for tests– OPC from IT/CO

• Interface: Wiener OPC still beta version (delay ~1.5 y)• Hardware limitation:

– No indication of status (mainly needed for prototype and test, no access in Alice)

– No individual switching– Setting voltages only if crate is off

3 June 2003 U. Frankenfeld 4

ROC High Voltage

• ISEG• Prototype for tests• Interface: OPC beta release (with problems)• Final (and last) in June (working to specs?)

– Final version: no individual switching on/off per channel

• Limitation of proto OPC (temporary solution)– No individual switching of channels– Not nice (but ok?)– No Hardware limitation (ref. to user manual)

3 June 2003 U. Frankenfeld 5

ROC Cooling

• Wago μPLC Prototype tested– Ok– Not radiation hard– Study of thermal behavior of ROC/FEE

• 2nd Prototype:– ELMB solution– Under test/development at thermal Lab (CERN)– Set point for cooling plant

• Highest requirements on temperature stability– Prototype for all systems

3 June 2003 U. Frankenfeld 6

TPC-FEE DCS

• -> Ralf• Ethernet switches in the Magnet?

– Otherwise 216 cables

3 June 2003 U. Frankenfeld 7

Pulser

• URD available • Development has started

3 June 2003 U. Frankenfeld 8

Field cage

• High Voltage– Offers for Power supply– Interface to SCADA system

• I monitor– Design of circuit started– Interface to SCADA system

3 June 2003 U. Frankenfeld 9

Laser

• No URD (on the way)• Discussions started• Items:

– Control of the two Lasers– Mechanical control– Control of camera

3 June 2003 U. Frankenfeld 10

Gas system

• System is build (almost ready)• Control by gas working group• Link to DCS to be defined

– Reading of status– Reading of temperatures– ….– Only reading, no control

• Additional Sensors– Drift Monitor– Pressure

3 June 2003 U. Frankenfeld 11

Controls Hierarchy

To Devices (HW or SW)

Act

ion

Sta

tus

&A

larm

s

ECS

DCS

TPC TRD

FC ROC

Crate

LHC

...

DeviceUnits

ControlUnits

Abs

trac

t le

vels

...

...

HVCool. LV

Crate

Crate

DAQ HLT

...

3 June 2003 U. Frankenfeld 12

Controls Hierarchy

• Start simple for CERN test• LV an HV connection to devices

– Prototype OPC with limited functionality

• Complexity growing with time – Integration of additional subsystems

• Final system:– Number of FSM?– Grouping?– Discussion with HMPID

3 June 2003 U. Frankenfeld 13

Miscellaneous

• Power for ELMBs (Switches, RCU DCS board?)• What Sensors when and where?

– Archiving

• Temperature sensors• Additional Sensors

– Pressure– ???

3 June 2003 U. Frankenfeld 14

Summary

• Prototypes HV, LV & Cooling by Sorina • Status

– Prototypes will be used in sector test– URDs– Laser URD on the way

• Limitations: ISEG (OPC) and Wiener (Hardware + OPC)

• Cooling and Gas system: Hans