Electronic Detector status and run organization

• Logistics and organization

• Updates on the electronic detector since last year run

• Conclusions

ED run schedule

• Start 27 april 2009

• Two weeks without magnetic field for HPT alignment

• One week rehearsal with magnetic field before the start of CNGS

Logistic and organization

• 1 person per shift. One shift per day (9-23).

• Run Coordinator of the whole run (supervision of data-taking, Brick handling and development).

• On-site on calls for Magnet/gas (request by LNGS SPP).

• Remote on call for RPC/XPC/VETO, HPT, TT and DAQ.

• Shifter on lab1 (external lab) + 3 underground tours/day.

• The shifter is authorized to pause for dinner and supper (he/she will be given a mobile phone receiving error messages by the slow control).

• From late may, one day every week ED shift inside hall C, following BMS activity (Proposal under discussion)

Tools for the monitoring• Electronic logbook (opera.lngs.infn.it)

Developed by Lyon

Tools for the monitoring• Wiki page with instructions and useful informations to be moved to LNGS

Preliminary

Tools for the monitoring•Vncviewer: basic tools for DAQ monitor, RPC HV, Magnet SC. Very effective but sometime fragile (easy to make mistake in shared mode). A dedicated machine (operavw) improved a lot the stability

•Web pages: sensor monitor and spectrometer slow control web page (environmental parameters as T and Humidity, magnet T, RPC T, HV, Timing Boards, currents and data-quality)

Developed by Lyon

Developed by Zagreb&Padova•Alarm monitor with e-mail and sms notification to experts on call

and shifter

Shifts booking

• New web page, common for all shifts (developed by A. Meschini) – see presentation by Mario Spinetti

Gas costs extimationFrom 27/4 to 30/11 = 7 months of runGas mixture: Argon/C2H2F4/isoC4H10/SF6=75.4/20/4/0.6Total gas flow=1600 l/h (RPC/XPC/VETO)

Needed:9 C2H2F4 (R134a) tanks (800 kg each)41 isoC4H10 bottles (20 kg each)6 SF6 bottles (50 kg each)7 CO2 batteries (360 kg each)

Costs (2009 prices):9*(7.5*800+85) Euro = ~55 kEuro41*(37*25+17) Euro = ~39 Euro6*(30*50+17) Euro = ~10 kEuro7*(3.0*360+85) Euro = ~9 kEuroLocation at LNGS of 2+spare C2H2F4 tanks for one year = 10000 Euro

Liquid Argon:~30 kEuro (7 months + cryogenic tank location and maintenance)Total cost for OPERA common funds: ~153 kEuro

Liquid Argon cost to be confirmed with 2009 prices

Electronic Detector Status and UpgradesDAQ : slides by JM

TT : see presentation

RPC/XPC : Maintenance performed Update of mezzanine software

VETO : Update of mezzanine software Number of controllers to be doubled (from 16 to 32)

HPT : implementation of new overall trigger boards

Magnet : Maintenance performed

Gas system :To prevent the problems of the last run, installation of oil filters on R134a tanks and visual check of isobutane bottles at the deliveryImplementation in the slow control to be done before the run start

PT trigger (simplified scheme)

XPC1XPC2RPC1

RPC11RPC12RPC13

RPC20RPC21RPC22

Trigger board(2/3 majority)

OROver-allTrigger board(OR)

Overall Trigger Board replaced (before was done with commercial NIM modules) Successfully tested at the end of the last year run

XPC/RPC/VETO mezzanine software test (I)

1 out of 7 rows out

September RPC dataOld mezzanine software

XPC/RPC/VETO mezzanine software test (II)

1 out of 7 rows out

The new version of the mezzanine software succeeded in recovering efficiency for a high number of words/cycleNevertheless a small effect is still present (decreasing efficiency for increasing rate) at the % level.

November RPC dataNew mezzanine software

XPC/RPC/VETO mezzanine software test (III)Tests on VETO controllers (by C. Gustavino and A. Bertolin)

(Hz)

The residual effect corresponds to a dead-time of 7.5 microseconds.It is under investigation (time needed to shift the FEB register). Possible solution requires controller firmware modification, external trigger implementation.

XPC/RPC/VETO mezzanine software test (IV)

The “residual” effect is also visible in few events of the runEvent 225081011: 1 rock muon + 1 interaction in the first TT (1.3 microseconds after), the muon of the second event is missing in the RPCs acquisition (but registered in the Timing Boards read-out by the TDCs)

Electronics detectors maintenance

RPC (maintenance interventions in december):2 Timing System cables replaced3 HV cables repaired/replaced1 i-meter channel substitutedGas system distribution in first spectrometer improvedTemperature slow control problem solved (Alberto Garfagnini)

VETO:Exhaust connected to the main OPERA exhaust in common with RPCsHV maintenance performed Number of controllers to be increased to 32

Magnet:Magnet experts by producing firm at Gran Sasso on 28 january to investigate about 1st magnet alarm in second stage converter (defective slave card of PLC substituted)Back-up chiller system commissioned

Conclusions

• Lesson well learned from last run (new software for RPC/XPC/VETO mezzanines, gas system improvements)

• Most of the maintenance performed and the rest scheduled before the start of next run

• The electronics detector run will start on 27 april and will last up to the end of november

• Documentation for shifters to be put in Gran Sasso wiki pages in the next weeks

• The web page for shift accounting is almost ready (see Mario Spinetti presentation)