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User name D.Wang/Kai
Log entry time 09:50:37 on November 19, 2009
Entry number 300990
keyword=right arm group 4 wide still missing after controlled access
We asked for controlled access trying to fix the missing signal. We
fanned out a pulser signal and input them into ps group4 and ts group 4,
and we saw group 4 electron wide signal from the anding module(with veto
unplugged). Also, we checked the signal with cosmics using xscaler and
also saw group 4 electron wide signal (although very few counts).
However, when beam resumed again, group 4 wide signal was still missing.
The counts in xscaler for E4Wd is 0. It looks most likely that the block
for E4Wd of the ANDing module is bad and the output is not giving any
signal. But, again, we saw it working even with cosmics during the
access. No idea what's wrong with it....
A copy of this log entry has been emailed to: xiaochao, rom, reimer