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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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