The Ohio State University Electronics Jianui Gu The Ohio State University “When a great team loses through complacency, it will constantly search for new and more intricate explanations to explain away defeat.” Pat Riley

Electronics Commissioning CERN schedule allowed only 3 Commissioning Days Dec. 19,2007 – Jan 19, 2008 We have had 5 weeks to Look at ME+ Electronics Team A – Greg, Misha, Fred,Igor, Jay, Jordan Tucker, Chad Jarvis,Shi-Chuan Kao,Nick Kypreos, John Babb 162 chamber's electronics powered 95 % of boards communicated immediately All firmware on detector boards upgraded DMB,TMB,VMECC,ALCT Greatest portion of time - Timing Constants Relatively Few Board Problems replaced 1 VMECC, 3 DMBs, 1 TMB barely touched spare boards All spare boards at CERN except: ~100 repaired CFEBs stored at OSU ~20 DMBs under repair at OSU 10 VMECC in various test stands Most Boards/Chambers have not been powered for more than a few hours in several years

Electronics Problems Encountered TTC Missing Hard Reset Problems - CCB initialization - DCC ??? VMECC new firmware hangs software - new firmware release last week (fixed) some CFEB/DMB userid's erased Many skew clear cables need to be reseated 2 Fiber Cassettes Reversed CFEB firmware downloading failure ME+1/1/35 CFEB1 TMB - some red warning for TMB status 3.3V or 1.5V reading) CFEB - some crazy temp readings CFEB - a few rx scans failed (not essential) Serious?! Could be a lot worse…

Status – Overall View at present electronics read in for 110/468=23% of detector Readout (Working on it): ME+1 12/104 missing - problems understood (probably fixed by now) ME+2(far),ME+3(far) 33/51 missing - not yet properly timed Lesson’s Learned(Still learning) Timing Difficult - cable delays are no godsend Need quick feedback on Farm Data Reference Chambers in Software not Crate/Slot - DBs needed (kludged for now) Commissioning needs to be done board by board - There are no short cuts

Are we going to make it? Not at this Rate ! We need to gain a month! 150 chambers/6 weeks Early June HV/LV/Cooling/Fibers??? Expect Delays! YE-1 Fiber Blowing started Timing is still the Major Issue electronics not debugged until DAQ works we uncover “real” problems in data taking ME+ chamber electronics needs to be fully commissioned by Mid-March to join the Cosmic Runs We are eating up a large amount of time even being able to pulse 150 chambers ! We are leaving no time for swapping front-end boards, Chamber problems, Global Commissioning Mid-March: Team A diverts to installing YE- Fiber Patch Cabling,… Commissioning Needs to Speed Up Double Shifts !?###?! Division of Labor …