Alignment meeting minutes Oct 26, 2006: --------------------------------------- Participants: Oleg, Samir, Dick, Jim, Duncan, Vladimir, Xiaofeng, Teresa, Alexi, Marcus No connection to CERN -> bad. Problems with getting keys for the room... Jim: Can provide better data for B=0 from MTCC 2 for Gyongyi by Monday. What to do about lost DCOPS data? Vladmir can't find a problems with it. He thinks the problem is in the terminal server. What's a decoupler box ? A:? Jim: There are 2 problems: 1) port vanishes, but it doesn't go out to the DCOPS 2) TS itself goes out and can't connect to anything. TS power cycle always helps. Happens randomly for 1-3 ports per day. Samir notes that there are also decoupler boxes on the disks (3rd fl). They haven't been checked since they haven't been accessible at the moment. Check next time when B=0T! 2 lasers are on simultaneously giving profiles with double peaks. Xiaofeng: Might be due to network problem. Jim: But they were ALL on at the same time. Vladimir: A problem with Valery's software ? Oleg: There are also problems with analog readout, so maybe a more global problem w/ analog R/O software. Power cycling is done by Vladimir for all components (ELMB etc.). ME+2: SLM 1,2,3 all look decent in r-phi. SLM1: doesn't go all the way across though. Deviations from straight line fit not too bad in r-phi. ME+3: 2 SLM bad, 1 SLM ok Dave: Analysis of PG data vs. theor. SLM and CMS positions from CAD. Deviations are ~2.5mm out in radius or phi than they should be. There are also chamber rotations in r-phi. DCOPS are also shifted. PG z is done relative to center of the iron disk and in principle can be related to real z positions when the disks are closed. Oleg: Z-sensor: ME+1 similar to before, ME+2,3 only 2 sensors working! Z2 sensors show day-night temperature expansion on the Z tubes (20-60 microns) PX data Oct 17-23 changes in a weird way. Correlation with B field doesn't make sense. Raw data shows identical data on 10/23 as on 10/20 to 5 digits! -> Serious DAQ problem for analog sensors since 10/12 !!! Sytnik, Xiaofeng are investigating.... CERN report by Vladimir: Currently hard to check b/c can't access cables with field on. Dave: T-sensors should show change day/night, so this would be a check even if we have no access due to B field on. Xiaofeng: Has trouble getting access to DB, trying to get help from Igor to get another account. First data to DB will be dummy data. Will try to take 1 day worth of data with rack PC and PVSS at the end of MTCC before opening of + side and push it into the DB. ------------------------ Notes taken by MH