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CSC Operations news

Feb.15-22

M. Ignatenko (UCLA)CSC Operation and DPG meeting

CERNFebruary 22, 2012

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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. • New ALCT firmware with 0-data suppression

format. We have not seen much difference in the results relative to old firmware.

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DCC+DDU• DCC and DDU firmware test during MWGR 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 new DDU + DCC firmware are in FED Crate 1

and 4. Old firmware is in FED Crates 2 and 3. 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.

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CSC Plan for MWGR • TF wants 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.• DCC+DDU - Global runs at different L1ac trigger rates (together with pixels; mostly random triggers) Long night cosmics run. What else? Automatic hard reset – can be also checked.

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DCC+DDU test

“High” rate run:45 kHz mostly randoms

CSC+DT 180 Hz cosmics - bottom only.

ME-1/1/17, ME-1/1/19And me+1/2/06 were ~100% in error.

1 OOS in the FED 756

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EPROM firmware • The first ALCT lost EPROM information

after 3 weeks since EPROM had been downloaded.

• No CFEBs have been detected with EPROM problem so far (1 month of monitoring).

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New hardware problems• ME-1/1/19 bad ALCT data 100% Under investigation.• ME-1/1/17 bad ALCT data ~90%. Under investigation. • ME+1/2/06 bad ALCT data ~100% Under investigation.• ME+1/2/33 ALCT trigger bit (bits) is always on – hot ALCT. Under investigation. Wrong trigger stamp and timing. Backup solution – disable ALCT trigger and use CLCT only (the timing must be changed).• ME-3/1/03 unstable behavior – up to 63% ALCT data corrupted. Under investigation. • 2 TMBs had to be replaced in the VME-3/6 (lost VME

communication)?• 1 DMB (me-1/121) lost VME communication. Fixed.

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3.3 V TMB fuses• At least 2 TMBs have been found where

3.3 V fuses are loose in the fuse cradles. This can be another reason for “big” voltage drop on the 3.3 V lead.

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CSC background

1. ME11 background reduced ~1.5 times after 1 month of HI run and 2 months without beam.

2. ME41 and ME42 increased due to beam pipe shield has been removed.

Noisy HV segments

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Access to the mini racks on the far side is fully blocked

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Shift information• Next week (Feb. 29) we are starting

regular DOC shifts.• Our DQM regular shifts are going to

start one week later on March 07 (UCLA).