Transcript Muon Piquet Report week 41

Muon Piquet Report
week 3
2013
Oleg Maev
28.01.13
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Main activities.
pA physics data taking.
Oleg Maev
28.01.13
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Problems/issues.
1. Shift on GEMs timing, ~2ns in advance due to higher gain on GEMs (low Lumi no drop of HV on protection resistor).
Adjusted by Giacomo, new recipes have been created by Sandro, applied on all
ODEs 23.01.2013 in the evening.
Oleg Maev
28.01.13
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Problems/issues.
2. Loss of the configuration on FEBs in M4/5C R4
Well known problem, it happened many times at the end of 2012 in M2/3, M4/5,
mostly in R4 on C-side.
I find a temporary solution. I’ve discovered an anomalous memory usage by
OPC-server task. Daily restart of OPC-server on affected PC fixed it for the
moment. But I suspect the real problem is on HW-side.
Oleg Maev
28.01.13
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Problems/issues.
3. L0MUON input data ERROR.
Coming from SYNCs 12/13 ODE-Q1M1R42, disappeared couple of times after
restart of the OPC-server, then reappeared again. Now is not present, will see
with beam.
Access requested.
Oleg Maev
28.01.13
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Problems/issues.
4. Loss of the configuration on all ODEs in Q2.
Happened twice this week. Loaded recipe was Default instead of Physics. It
caused the problem with timing everywhere in Q2. Easy to fix it by reset. Visible
on normalized plot in M1.
Also, there is an anomalous memory usage by OPC-server task in muodea02w.
Daily reset of OPC-server is recommended.
Oleg Maev
28.01.13
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Problems/issues.
5. Serious problem in Contron Line on M2/3, C-side.
Happened 22.01.13 in the morning same
way we had many times in the past.
OPC-server was looping and we lost
communication with chambers.
Unfortunately, at that case we lost a
configuration on many FEBs in M2/M3
as well.
I managed to localize the problem to
Q3R4. As a temporary solution we
disconnected the CAN-BUS line from
SYSTEC and configuration has been
recovered on the rest of chambers.
Today Davide prepared a tool for
switching a single ELMB OFF, but
when I’ve reconnected CAN-BUS back
to the SYSTEC in order to find the
faulty SB/ELMB, problem disappeared
by itself. Problem in ProblemDB closed.
Oleg Maev
28.01.13
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Davide’s Tool for Switching OFF/power-cycling ELMBs.
Oleg Maev
28.01.13
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Conclusion.
Now MUON is fully operational and it is in very good shape.
I just keep fingers crossed.
But, still there is a request on calling MUON Piquet at the beginning of every new
FILL (when STABLE BEAM declared) and after each reset on MUONC during
data taking.
Next Piquet Flavio.
Oleg Maev
28.01.13
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