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Status Report of Noise Hunting

Status Report of Noise Hunting. H.Torii(Kyoto Univ.), K.Okada(RBRC) ERT lvl1 meeting 2002/Oct/25. Trial of two GTM. Two GTMs (EMC.W.B & ERT.W) Condition of GTMs No PPG Used Internal clock No coincidence of two clocks… Send mode bit of CALDAC fire at 80Hz

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Status Report of Noise Hunting

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  1. Status Report of Noise Hunting H.Torii(Kyoto Univ.), K.Okada(RBRC) ERT lvl1 meeting 2002/Oct/25

  2. Trial of two GTM • Two GTMs (EMC.W.B & ERT.W) • Condition of GTMs • No PPG • Used Internal clock • No coincidence of two clocks… • Send mode bit of CALDAC fire at 80Hz • After a certain latency, send a LL1 trigger to the GTM for ERT. • Condition of EMC FEE • Threshold was set enough higher than normal noise level • 2x2 23 • 4x4 32 • Set CALDAC at the maximum(63) • Set CALDAC enable for all West Bottom channels(5184) • EMCal Trigger board worked like an analog board, not digital.

  3. Latency Scan Upper figure: # of trigger out of 100 events Lower figure: # of SM with more than 50 trigger out of 100 events Succeeded!!!! 4x4A 4x4B 2x2

  4. For improvement • Actually, we spend 2.5nights for more sophisticated way • Special partition (Thanks to Sergei) including • EMC.W.T • EMC.W.B • ERT.W • Not standalone mode RC • Failed to run the EMC DCM • Got an error message. • No idea how fix until next week when people finish the upgrade of the oncs software.

  5. Summary and Future • We are almost ready for the noise hunting • The efficiency is not 100%, but enough for this purpose • If the MTM is working, we can use it as the external clock. • Two issues from last week. • One dead receiver board or ROC • Became alive this week!!! Need investigation • Too noisy only for 2x2. • Especially at the west top(W2,W3) sectors • No idea how to fix. • Next week plan • Start multiplicity/channel scan for noise hunting

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