ecal detector control system : status report

G. Dissertori ETHZ CMS Electronics 2002 1

ECAL Detector Control System : Status Report

G. Dissertori

ETHZ

17.10.2002


ECAL Electronics, DCS

Outline

• News • The M0’ experience• Current activities• Plans/Next• Conclusions



• Specification document finally released (today) • collected comments from P. Bloch and from the members of the DCS group

• circulate now inside the collaboration

• Deputy project leader• would like to propose Serguei Zelepoukine from IHEP Protvino as Deputy Project

Leader

News



• Excellent work done by S. Zelepoukine and the Belgrade group

• Precision Temperature Monitoring• we can achieve the precision required

• The ATLAS ELMB is a viable backup solution for the readout system if placed not too close to the detector

• Safety system• A safety system with interlocks to the HV/LV has been built and operated

• discovered large sensitivity of the PLC to the environmental noise --> to be propagated to JCOP/ITCO

• PVSS on Windows: not yet as stable as we would like...

• no interface yet to the DAQ

The M0’ experience



• Sensor issues• Humidity sensors :

• together with Tracker DCS group a large number of possible sensor types is currently evaluated, tested, irradiated etc.

• Specifications (chosen sensor) hopefully by end of the year.

• Pressure/flow meters : • together with Tracker DCS group and Frank Glege we are elaborating a little requirements

document in order to start a discussion/collaboration with the cooling people.

• We would like that they choose and install the sensors, and that we take care of the read out and safety actions.

Current activities



• RBFE board

• Two technicians from Protvino together with the LHC-ACR group

• study and test of the RBFE (Resistance Bridge Front End) board

• for sensor excitation and signal conditioning before sending over long signal cable

• want to combine this with a MUX --> investigations of MUX candidates (issue : radiation hardness)

Current activities...



• Lab test of Keithley readout system

• Student from ETH together with W. Lustermann and S. Zelepoukine

Current activities...

• study of cascaded MUXing system

• analysis of switching time limits ---> current limit coming from the RBFE board

• analysis of signal precision over long cable (120m)

• test will be carried on by a further ETH PhD student



• Software• ETH student (Alison Lister) has started to work on software framework, as

well on first PVSS set-up for the temperature monitoring

• will also look into the communication with XDAQ and databases

• Cabling• Serguei has started to discuss with the CMS Integration group about the

cabling layout for DCS :

Current activities....



ECAL DCScabling andfront-end electronicslayout

Counting roomCMS

Barrel

Endcap

Barrel

Electronics



TMUX Keithleyx 10 x 45PC

45

TMUX Keithleyx 45

PC45

TMUX

50 m

45CANELMB

100 m

PC1

1

4

Detector Balcony Counting room

TMUX Keithleyx 10 x 45

PC45

28

3

CANELMB6 x 10

PC



• Irradiation tests • plan to go with a small group to PSI (end of Nov) in order to do irradation

tests of the RBFE board components

• SM0 integration test• we start ordering items

• bring some of the M0’ setups back to B27 to be used there for those tests

Plans/Next



• Overall good momentum• My worries

• will be difficult to keep this momentum over the winter months, since the main actors will not be at CERN or be overloaded with other duties

• have to well define the activities which can be carried out in the home labs

• DCS for Preshower : need urgently resources

• A question• has anybody in CMS in general thought about the issue of Galvanic

isolation (detector - counting house) for the DCS system??

Conclusions

ecal detector control system : status report

Documents

dcsecal electronics

testsplansnextecal electronics

m0 experienceecal electronics

tracker dcs group

zelepoukine current

dcs outlinenews

dcs groupcirculate

small group