1. 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

2. 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

3. 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…

4. 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

5. 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 …