CSC Operations news Feb.15-22. M. Ignatenko (UCLA) CSC Operation and DPG meeting CERN February 22, 2012. CSC operations news. New TF firmware with 0-data suppression format is in action. No errors have been detected in many local and global runs.
M. Ignatenko (UCLA)
CSC Operation and DPG meeting
February 22, 2012
No errors have been detected in many local and
We have not seen much difference in the results
relative to old firmware.
We hope that they reduce the rate of event with DCC
and DDU out of sync (had been demonstrated in the high rate
runs with random and radioactive triggers).
At the same time the errors were detected even in the
night Global run with L1ca rate 770 Hz.
a. Increase timeout to 420 usec(wait time for DDU block).
b. L1 mismatch counter doesn’t clear on resync (but clears on
all other reset types).
c. Gbit link to local DAQ (Spy channel) is functioning.
d. Eliminate garbage packet on resync in spy channel.
1. To demonstrate that we can run at 105 kHz
without getting into busy state.
2. To demonstrate a correct response on resync
signal during busy state.
- Global runs at different L1ac trigger rates
(together with pixels; mostly random triggers)
Long night cosmics run.
Automatic hard reset – can be also checked.
“High” rate run:
45 kHz mostly randoms
CSC+DT 180 Hz cosmics - bottom only.
And me+1/2/06 were ~100% in error.
1 OOS in the FED 756
Under investigation. Wrong trigger stamp and timing.
Backup solution – disable ALCT trigger and use CLCT only
(the timing must be changed).
This can be another reason for “big”
voltage drop on the 3.3 V lead.
Noisy HV segments
ME11 background reduced ~1.5 times after 1 month of HI run and 2 months without beam.
ME41 and ME42 increased due to beam pipe shield has been removed.