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User name A. Camsonne
Log entry time 14:37:11 on April 20, 2010
Entry number 318461
keyword=GEM activities
We put the fifth GEM physically in. I did not hook up the gas so I could
look at the INFN chamber.
I set up a source trigger to check out the signal, chamber 3 works fine
as expected confirming the source trigger was working and we could see
cosmics/ source, but I did not see any signal on the 4th chamber, I
pushed the HV to 4400 V but did not see any hint of signal.
We left the Hall since it was 2PM, I removed the the source trigger and
the aluminium cover I put under the GEMs while we were working on them.
We will hook up the 5th chamber to the gas system at the next access, I
guess we will need about one more hour including opening and closing the
HRS doors.
We will try to swap the HV distribution on the INFN chambers next time to
see if one of the channel of the divider did not got bad.