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This week. CSC this week: lots of LHC developments (Greg) Nearly 3E33 with only ~618 bunches ( 1408 soon)) Mostly okay running, a few hiccups. 1st look at 2012 data: DQM plots and timing ~okay (DQM shifter, Chris) Defined 2012 CSC service “needs”, pledges rolling in (293/456 months) XEB:

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this week
This week
  • CSC this week: lots of LHC developments (Greg)
    • Nearly 3E33 with only ~618 bunches (1408 soon))
    • Mostly okay running, a few hiccups.
    • 1st look at 2012 data: DQM plots and timing ~okay (DQM shifter, Chris)
    • Defined 2012 CSC service “needs”, pledges rolling in (293/456 months)
  • XEB:
    • CMS reported luminosity is 20% higher than ATLAS – truth?
    • Seems like LHC is ~1 week away for 7E33, Trigger group plan is for ~4 week development - ?
  • JH reviews all proceeding towards publication:
    • Signed off as ARC chair for Wmn in heavy ions CWR
    • Signed off as ARC member for SUSY same-sign dileptonCWR, closing in on same-sign dilepton+2 b-tagsCWR
    • Watching Z’ paper just finished CWR, authors to update draft
    • Need to vet replies to JHEP referee for quarkonium in heavy ions
muon trigger
Muon trigger
  • Talked with Slava today to understand better
  • Excellent improvements over shutdown:
    • L1 trigger rate -60% from 2011 due to CSC-TF improvements
    • HLT at 5E33 would have had to run inclusive single muons at 100 GeV with 2011 configuration, now at 40 GeV
      • Fixed a problem with offline/online track matching
      • Triggers now ~80% “pure” muons
  • 5E33 main muon triggers:
    • Single mu Pt>40, eta<2.1 rate ~15 Hz
    • Single isolated mu Pt>24, eta<2.1, rate ~28 Hz (goes to 30 GeV at 7E33)
    • Dimuon Pt>17 and >8 GeV, 7 Hz
    • Dimuon Pt>17 and tracker muon>8 is 9 Hz
  • ATLAS runs with lower single muon trigger thresholds
    • ~20-25 vs 40 GeV: do we dedicate too little bandwidth (~10%?)
    • Higgs group may rely in 2012 mainly on dimuon triggers
    • HLT isolation improvements still possible, but time short, little manpower
ahead
Ahead
  • Phase 2 muon upgrade: where does system break?
    • Preliminary study by June – moi plus who for CSC?
  • To address within CSC group:
    • LV is unstable on 27 chambers (26 in ME1/1), vs. 10 known dead
      • Clare will report tomorrow to CSC Ops/DPG, see next slide
      • Implies the system could deteriorate dramatically at any time
    • Tracking of electronics via multiple databases, if at all
    • CSC web pages are horribly organized
      • Lots of dead links
      • No documentation for some of our electronics
      • Thinking to reorganize along CSC org chart lines
    • Shift tools are clunky, would like to improve (but who cares?)
  • Get back to neutron note … someday soon?
lv to chambers preview
(10 chambers on CSC whiteboard)

Clare initial summary:

Out of 473 chambers, I found 27 with instabilities in either the analog or digital (or both) lines.  

16 are ME-1/1 chambers, 10 are ME+1/1 and 1 is ME1/2/36.  

Most of the instabilities are on the digital line, although a few show instabilities on the analog as well.  

LV to chambers preview

Clearly bad (whiteboard: lost 7.5v 28-Jun-11 entry)

  • Fairly bad (whiteboard: lost 7.5v Apr. 2011)
  • Worrisome (not on CSC whiteboard)
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