Notes of EMU Hardware Alignment meeting, 1/18/07 --------------------------------------------------------------- Present: Oleg, Dave, Dick, Jim B, Duncan, Jeff, Vladimir, Xiaofeng, Valery A., Teruki, Alexei, Jim P. Marcus missed first 25 minutes (and Xiaofeng's talk; so please see his slides) - Samir will provide update on authorative list of sensor names so that this can be implemented across the board (Jim: DCOPS r/o, Xiaofeng: Analog r/o,Samir: root file & calibration files) - Xiaofeng will estimate current disk space need for Oracle DB; Marcus will contact responsibles for allocating that space. Jim B.'s talk (see his slides): Full r/o and fitting of beam profiles is 16 min. = 10 times faster than before Discussion if we need the raw data in the DB so that users (e.g. COCOA) can tell if the data we are trying to fit are good or bad. Duncan "harps" that we should store all raw data in DB for now. Alexei: Maybe do some pattern recognition of bad profiles and flag them. Jim B. will look into saving all raw data in upcoming commissioning runs to DB (and not just to log files) until we are confident about data and fit quality. Alexei has a new student who will look into DCOPS raw data and fits using log files from MTCC. For future we use DB for full profiles. Jim will send code to Xiaofeng for test on rack PCs. Alexei raises the question if we still need the firmware upgrade if we can fit in software in 16min for the whole system. Oleg & Duncan say we will continue for a few months to develop expertise with boards and firmware. Answering a question from Marcus, Jim says that the data he provided for COCOA analysis comprises 38 separate alignment events spanning 2 weeks and including data for B=0T and B=4T. Dave modified 128 filters before ME+ DCOPS recalibration. Eliminated mechanical problems in DCOPS originally mounted by NEU. This Saturday we start reinstallation of repaired DCOPS and Z on ME+ underground (Armando et al.) Dick: Access will be quite limited though. No access after Jan 26. We will compete with RPC installation. Use the existing B=4T Shimming for ME+? Dick: No, because we will have B=0T conditions for 9 months. Dave: Shims are single piece. Shims are still on the mounts. Dick: PG will be very hard if not impossible underground. Marcus: We should have the same conditions as above ground for which we have PG from MTCC. Dave says that shims for straight line B=0T conditions do not exist. We only have them for B=4T. So, we'd have to produce them. Dave would have to make drawings and have them produced at a company. Duncan and Dick argue that it should be shimmed for B=0T to "make the system work". In the end, the decision is to use the same B=4T shims on ME+ underground. At the same time plan to produce shims for one SLM or a full station of ME- above ground to test if we can improve threading the SLM laser beams through the DCOPS. On the laser mount modification: Dick: Do nothing for SLM until we understand the design and data taken during MTCC; Dick will find out status from Farshid and we will decide if we need the mount modifications after the analysss is complete. Oleg: On the other hand we absolutely need the modification for the Transfer lines, so plan to talk to Jim Freeman to continue design at FNAL. We agree that the alignment software meetings will start at 18:15 CERN time from now on, i.e. 15 min. later because Marcus teaches until 18:15 and other possible days like Wed are bad for CERN people. Hardware meetings will, however, continue to start at 18:00 CERN time.