1. Electronic Detector status and run organization Logistics and organization Updates on the electronic detector since last year run Conclusions

2. 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

3. 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)

4. Tools for the monitoring Electronic logbook (opera.lngs.infn.it) Developed by Lyon

5. Tools for the monitoring Wiki page with instructions and useful informations to be moved to LNGS Preliminary

6. 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

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

8. Gas costs extimation From 27/4 to 30/11 = 7 months of run Gas mixture: Argon/C2H2F4/isoC4H10/SF6=75.4/20/4/0.6 Total 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 kEuro 41*(37*25+17) Euro = ~39 Euro 6*(30*50+17) Euro = ~10 kEuro 7*(3.0*360+85) Euro = ~9 kEuro Location 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

9. Electronic Detector Status and Upgrades DAQ : 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 delivery Implementation in the slow control to be done before the run start

10. PT trigger (simplified scheme) XPC1 XPC2 RPC1 RPC11 RPC12 RPC13 RPC20 RPC21 RPC22 Trigger board (2/3 majority) OR Over-all Trigger board (OR) Overall Trigger Board replaced (before was done with commercial NIM modules) Successfully tested at the end of the last year run

11. XPC/RPC/VETO mezzanine software test (I) 1 out of 7 rows out September RPC data Old mezzanine software

12. 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/cycle Nevertheless a small effect is still present (decreasing efficiency for increasing rate) at the % level. November RPC data New mezzanine software

13. 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.

14. XPC/RPC/VETO mezzanine software test (IV) The “residual” effect is also visible in few events of the run Event 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)

15. Electronics detectors maintenance RPC (maintenance interventions in december): 2 Timing System cables replaced 3 HV cables repaired/replaced 1 i-meter channel substituted Gas system distribution in first spectrometer improved Temperature slow control problem solved (Alberto Garfagnini) VETO: Exhaust connected to the main OPERA exhaust in common with RPCs HV 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 1 st magnet alarm in second stage converter (defective slave card of PLC substituted) Back-up chiller system commissioned

16. 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)