report to the collaboration & some news from sep 07 cms week india-cms collaboration meeting...

Report to the Collaboration &Some News from Sep 07 CMS

Week

India-CMS Collaboration Meeting Delhi University, 27-28 Sep 2007

A. Gurtu

Tata Institute of Fundamental Research, Mumbai

• First of all thanks to DU for agreeing to host this India-CMS meeting as accommodation situation at TIFR was impossible.

• I’m sure, going by past experience, the arrangements will be good

• Welcome!

Status of India-CMS tasks

Si-PSD

• the sensor and module mounting was on-going successfully, > 1000 shipped to CERN

• BARC electronics contribution (300 kCHF)

70 kCHF for 2 technical staff for 2x6 mths

For remaining 230 kCHF, exploring in-kind contribution, OptoRX board fabrication in India (ECIL, with BARC overall responsibility). Discussions in progress. Hope it will work out.

GRID Tier-2 Centre

• Hardware successfully installed (~ 25% of nominal)• All technical tests passed successfully• For getting completely integrated into CMS GRID and

taking part in CSA07, need to set up PHEDEX – under progress. Took a long time, and got advice etc from CERN, Taiwan (Tier-1), others.

• Probably the last hurdle was insufficient bandwidth, now upgrading to 300 Mbps/ 1 Gbps.

RPC affairs

• All the materials for making the first 10-12 chambers are now at BARC (one last box from CERN to arrive in a few days).

• LMP will give details and one should try to set up a work plan involving university students and staff to the maximum extent possible.

• LHC progress

LHC Installation Overview

Cryo-magnets:All cryo-magnets are in the tunnel

Interconnections:6 arcs are now closed (3-4, 4-5, 5-6, 6-7, 7-8 & 8-1)Interconnections work will finish soon.

Inner triplets:All low- have been repaired, interconnection work proceeds as scheduled

Repair of the TripletsAn inner triplet assembly of quadrupole magnets at Point 8-Right of the LHC was

successfully tested in the accelerator tunnel on Friday, July 13.

Q1 and Q3 magnets, at either end of the triplet assembly, fitted with a set of four metal cartridges of a compound design consisting of an aluminum alloy tube and an Invar rod to allow them to function over a broad range of temperatures.

All of the triplet quadrupole magnets have been repaired

A Q1 magnet assembly with cartridges held in place by the four earlike brackets bolted to the outer flange

Situation in SectorsArc 1-2 and 2-3: interconnection on-going, closure in Sept.

Arc 3-4: closed, leak tests of individual sub-sectors in progress

Arc 4-5: cooled at 80K, ELQA tests on goingLeak appeared in DFBA at 4R, now fixed 3 weeks

delayNew leak appeared in 5L, need to be localised and

fixed…

Arc 5-6 and 6-7: closed, leak tests of individual sub-sectors on-going

Arc 7-8: warmed-up after partial power tests (no low-)Replacement of MB1055 done, repair in progress

according to scheduleProblems with Plug in Modules (PIM)

Arc 8-1: closed and pressure tested, flushing startedOne leak still not fixed, localised in cold mass of

Q17.R8

First Cooldown: Sector 7-8

From RT to 80K pre-cooling with LN2. 1200 tons of LN2 (64 trucks of 20 tons). Three weeks for the first sector.

From 80K to 4.2K. Cool-down with refrigerator. Three weeks for the first sector. 4700 tons of material to be cooled.

From 4.2K to 1.9K. Cold compressors at 15 mbar. Four days for the first sector.

First sector cooled down to nominal temperature and operated with superfluid helium; teething problems with cold compressor operation have now been fixed.

Magnet temperature profile along Sector 7-8 during final cool down to

He II

Cooldown of Sectors 4-5, 8-1

http://hcc.web.cern.ch/hcc/

Sector 45 Last week completed electrical qualification of sector 45. All circuits powered via the DFBs were tested at 50 V. The leaking sub-sector close to Point 5 has been brought to room temperature. All the efforts concentrated to localize and then to repair the leak which is of the order of 1 mbar l/s.

Sector 81After one week of conditioning, flushing of the sector started on Monday 10th. The SSS replacing Q17L7 (which has a leak on the cold mass) is being prepared for cold tests in SM18. Installation of this SSS will take place together with the localization and the repair of a leak in the inner triplet assembly left of Point 1.

Sector 7-8

The consolidation campaign is nearing its end: eight vacuum sub-sectors are fully repaired and ready to be closed for the vacuum tests.

The total number of damaged plug-in modules on the beam lines in the arc is five out of 450: together with the five in the dispersion suppressor region (where damage was expected)

In the inner triplet region left of Point 8, after the repair of Q1 on the surface, the magnet was re-installed and the interconnection of the inner triplet magnets is progressing.

Plug-In Modules

Details: PIM Fingers

Damaged Plug-In Modules

LHC General Coordination Schedule

Expectations of Luminosity Buildup

Phase A: Luminosities

Bunches * Ib Luminosity Event rate

1 x 1 18 1010 1027 Low

43 x 43 18 3 x 1010 3.8 x 1029 0.05

43 x 43 4 3 x 1010 1.7 x 1030 0.21

43 x 43 2 4 x 1010 6.1 x 1030 0.76

156 x 156 4 4 x 1010 1.1 x 1031 0.38

156 x 156 4 9 x 1010 5.6 x1031 1.9

156 x 156 2 9 x 1010 1.1 x1032 3.9

IP 1 & 5

Approx 30 days of beam time to establish first collisions

1 to N to 43 to 156 bunches per beam

Pushing gradually one or all of:

Bunches per beam

Squeeze

Bunch intensity

CMS Progress

Progress since June CMS Week (I)

CMS has made significant progress over the summer (thanks to all involved).

There are no significant open technical issues.

Main highlights are:

• Surface: Tracker: Completed commissioning. A large Si strip system (~ 2Mch out of ~ 10Mch powered) has been operated at 15,10,-1, -10 and -15 ºC. 5M cosmics taken for noise, efficiency and alignment studies. Quality is excellent (few per mille dead or noisy channels). Efficiency > 99%. Tracker is ready for installation.

• UX: ECAL: barrel has been installed and tested. The quality is excellent (28 dead/noisy ch out of 61200). Endcap crystals production is going smoothly - over 6000 delivered - transition from barrel to endcap was very smooth. Contract for the remaining 5500 endcap crystals has been signed (last EE crystal will be delivered end-Mar’08). Integration of 1st Dee proceeding well. On track for 1st endcap ready by end Feb/beg Mar’08. 2nd endcap ready by end Jun’08.

• SX: Muon RPCs: YE-2 and YE-3 disks equipped with RPCs. All surface-mountable muon chambers now installed.

Progress since June CMS Week (II)

iv) UX: Commissioning with cosmics of detectors installed in UX proceeding (e.g. YB0, YB+1 and 50% YB+2 DTs done). CMS Global cosmics runs started - recently recorded cosmics in ECAL and DTs.

v) UX: Plus-end was opened for consolidation and preparation for cosmics data taking in November/December. The movements made with cable-chains attached.

vi) SX: YB-1, YB-2 are ready to be lowered in October according to v36 schedule. They have been commissioned using cosmics. The minus-end disks (YE-1, -2, -3) will be lowered before the end of the year again according to v36 schedule.

vii) UX: Critical path still goes through the installation of services on YB0 in readiness to receive the Tracker. The untried operation of HB/EB services has taken longer due to our stringent QA/QC philosophy (install and test/measure after every step - surveys done to ensure envelopes are respected). Always seeking ways to minimize risks during installation - some tasks have been moved from after tracker insertion to before.

Progress since June CMS Week (III)iv) UX: HF raising and shielding closure test was introduced. Much is

being learnt (off critical path), reduce risks when closing Xpt for beam

v) UX: Beam-pipe installation on minus-end completed (off the critical path) much was learnt. Will help in installation of remaining sections.

vi) US: All magnet ancillaries lowered, re-mounted & ~commissioned. on schedule, pressure tests done. Start pumping end-September, start cool-down end-Oct, powering tests at low current end-November.

vii) Preparation of Computing Infrastructure: a 50% (of 2008 requirement) round-the-clock data challenge (CSA07) will be conducted for a month starting end-Sept. The CMS Computing Model will be exercised.

viii) Preparation of Software: Releases now synchronised with CMS needs for commissioning, online (HLT) and offline (reconstruction and physics) culminating in the final release ~ Mar’08 for 4T cosmics run and 2008 physics run.

ix) Preparation for physics analysis at startup: HLT timing target of 40 ms/L1_event achieved. 2007 physics exercise (10, 100 and 1000 pb-1) due to produce results by Nov 2007.

Aug Global Cosmics Run: UX-US

ECAL & DT chambers synchronised with the CMS clockThe DT trigger is synchronised with the DT ReadOut The DT trigger is integrated with the CMS Global TriggerThe ECAL & DT r/o is integrated with the GLOBAL DAQShifters also at FNAL, read out FEDs from each sub-detector

UX5: YB0 Services Installation

Tracker LV cables

HF Riser TestECAL Barrel

Trkr: Insulated Cooling Pipes

(one tested with fluids at -30 ºC)

Tracker Readied for Transport to Pt5

Barrel ECAL Installation Completed: 27 July

18 SMs installed and tested in 12 working days!

Mounting of Supercrystals on Dee1

Offline Overview and ObservationsProgress over last 3 months: incomplete list ! (more from JH)Release of CMSSW 1_6_0 (Commissioning tests, CSA07, ..Improving software and build proceduresMuch effort going into improving realism and accuracy of CMS simulation

(update geometry etc. in conjunction with DPG groups, tracker budget by 1_7_0, …)

Large scale reconstruction for physics analysis and CSA07Performance Task Force: analyzed and improved performance of HLT,

reconstruction code etc. Probably a never-ending task !

ManpowerManpower plan established - needs identified, now scrutinized onceFocus on critical areas : Event Filter, DQM, Tier 0, …Use MoAs as a tool for finding missing effort

Observations from Reviews

Improve release procedures, Continue to improve code quality, Improve coordination between the central DQM team and the sub-detector teams, Prepare a strategy for managing changes in event data model- ‘schema evolution’

CMSSW Software Release PlanJune

July

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Cosmic Run

CSA07

Pre CSA0750Mevts/mth

MC Production for startup

100M evts/mth

GEN+SIM production with 14x

DIG+RECO production with 15x

1_6_0 : Opened July 2, closed July 23, deployed Sept 3 Prepare for CSA07 and Global Runs (Sep-Oct)Integrate HLT components developed for HLT exercise

Use HLT trigger paths to create streamed primary datasets for testing analysis and calibration data-flows & work-flows

1_7_0 : Open Sept 18, Close Oct 2, deploy Oct 26Prepare for Cosmics Run Allow backward incompatible changes in geometry & data

formats

1_8_0Integrate changes resulting from CSA07 experienceContinue production of MC samples required for on-going

detector and physics studies

2_0_0Integrate changes resulting from Cosmic Run experienceStart production of physics MC samples 3 months before

start of data-taking

Computing Overview and ConcernsTransition from commissioning to stable operations while supporting on-going

physics studies and detector commissioning

Progress over last 3 months: incomplete list ! (more from MK)Production of ~ 150 Mevts (rates up to 65 Mevt/mo) for Physics, CSA07,..Usage of CASTOR for running T0 applications (CSA07 requirements)Much effort into improving reliability of data transfersImprove site commissioning using Site Availability Monitoring (SAM) tools.

Site visits planned to improve availability (and involvement).

Computing Software Analysis challenge CSA07 much has gone into its preparation. Launch w/s 24th Sept. Stress test of stability and performance of CMSSW and production tools.

ConcernsManpower (use MoA process) - three Level-2 conveners still not found ! Data Hosting for CSA07 needs to be defined this weekCSA07: Reliability of sites (measured by SAM), connectivity and data

transfers between T0-T1 and T1-T2 sites

CSA07 Workflows

CSA07 Metrics

CSA07 Computing, Software and Analysis (CSA) challenge (Sep-Oct 2007)

Mimic in detail what is needed in 2008 (at a scale of 50%) 200 Mevt mis-calibrated/mis-aligned (for 10-100pb-1) Making (at the T0) and distributing (to all T1 centers) the AOD data.

Placement of data in the Tier-1 centers (discussion this week). Running of skims at Tier-1 centers Re-reconstruction at the T1 centers Re-making of the full AOD samples after a re-reconstruction step. Copying of the skimmed datasets to Tier-2 centers and execution of analysis

exercises at these centers. Migrate the bulk of analysis activities to Tier-2 centers.

Parallel (with the processing of the CSA07 data at the Tier-0) Monte Carlo production of signal events at the Tier-2 centers

CAF (CERN Analysis Facility): first test of “Express Line” for fast turnaround of a few analyses.

Reminder: Overall Plan & PhysicsGlobal priorities:

- Detector completion and commissioning

- Detector Performance

- Physics Objects

- Physics AnalysisPhysics-wise: focus on discovery

Standard Model studies: a necessary step

- Obviously, lots of good physics there as well

- But priority is in preparing for the main physics (new) that the LHC is conceived for

And, to do physics we also need to:- Complete and commission trigger

- Complete software

- Deploy computing model – and use it effectively

CMS Physics: Basic Program of Work

• Up to Nov 2007• Concentrate on the physics that we can do with up to 1fb-1.

– Work in being done in order to chart out the “how” we will do this work, and to prepare methods, tools and people.– Completion of 1fb-1 exercise (Nov) - Approach the “1fb-1 goal” in a set of successive approximations (10, 100 and 1000 pb-1).

• From Dec 07 to May 08

• Prepare for the actual data. Goals:– Have all the datasets and streams defined– Have all of the HLT code in place– Have all the trigger monitoring system (code + people) in place– Have all the Monte Carlo events in place– Have all the data-analysis organization (code + people) in place– Have analyses (geared for 10 pb-1 & 100 pb-1) ready to absorb the data

CMS physics organizationPhysics

CoordinatorP.SphicasDeputy:

J.Incandela

MC generators

P.BartaliniF.Moortgat

HiggsA.Nikitenko

Y.Sirois

SUSY-BSMS.Eno

M.Spiropulu

EWKR.Tenchini

B physicsU.Langenegger

b-taggingT.Speer

I.Tomalin

Jets/MissETG.DissertoriN.Varelas

MuonsN.Amapane

N.Neumeister

e/D. FutyanP.Vanlaer

ParticleFlow/

R.CavanaughP.Janot

DiffractionM.Grothe

Heavy IonsD.D’EnterriaB.Wyslouch

Super LHCD.Denegri

QCDK.Rabbertz

TopJ.D’Hondt J.Mnich

Call for nominations for co-conveners and second deputy physics coordinator sent to CB/MB. Deadline: Oct 1st.

New two-year terms: starting on Jan 1, 2008

High-ET jets: sensitivity with 10 pb-1

• Dijet Resonances signal for a 2 TeV excited quark (Tevatron has excluded m<0.78 TeV)

• Contact Interactions in Dijet Ratio (with new optimized cuts)– 95% CL excluded scale + = 5.3 TeV, 5 discovered scale + = 4.1 TeV.– Well beyond last Tevatron limit of 2.7 TeV at 95% CL.

Dijet Resonances in Dijet Mass

Contact Interactions in Dijet Ratio

M. Cardaci , M. Jha, M. Zielinski

Charmonium backgrounds

• Detailed studies performed on fitting irreducible backgrounds to prompt J/, like: (2S) → J/

• Can be estimated with (2S) → mode (BF-ratio well known) cJ → J/

Z. Yang,D. Majumder

(Mumbai)

M= M(J/) - M(J/) resolution crucial to disentangle contributions photon 4-momentum correction using J/ vertex

• Resolution sufficient to isolate c1 and c2

contributions

c1 → J/

c2 → J/

Skims and CSA07

• 2 B-physics skims defined (mainly based on HLT bits):• tauTo3Mu skim• “onia” skim jpsiToMuMu, upsilonToMuMu, btoMuMu (with

displaced di-muon)– Configured at HeavyFlavorAnalysis/Configuration/data/HeavyFlavorAnalysis.cff

– Event size: about 800k (RECOSIM), 200k (AODSIM)– Samples will be located at CSCS and RWTH

• Participation to the CSA07 exercise B-physics group contributed in providing information (cfg files for generation, selection efficiency ... etc.) for:– “onia” and pp X samples in the 100M data cocktail– 19 heavy-flavor signal modes

A. Starodumov, L. Wilke,Z. Yang, M. Giffels (Aachen),

C. Eggel, K. Mazumdar (Mumbai)

Planning, CSA07 & physics schedule

Schedule/plan

• Entered final stretch towards first results on 2007 analyses– Draft Analysis Notes by Oct 18– Presentation and review of each analysis at October

Physics/Trigger week– Pre-approvals in physics groups in the following weeks

• Goal: complete analyses at level needed for approval by Dec CMS week

– Data used: 1_3, 1_5 (note: almost entire CSA07 data production available with 1_5!)

• In parallel: participation in CSA07– End Sep-End Oct: skims, monitoring of data produced

CSA07 and physics• Main Tier-0 output: ~150 Mevt

– 100pb-1 of data (not quite, e.g. not enough QCD jets)– Reconstruct with calibration/alignment constants corresponding to

“detector knowledge with 10pb-1 of data”• Tier-0 production ~200Mevt, have another 50Mevt to use

– Add “10pb-1 of data”; reconstruct with startup calib/align precision• AOD crated and distributed to (all/multiple) Tier-1s

– Run skim jobs on AOD at Tier-1’s• Test re-reconstruction at Tier-1

– Same data, so this time run with 100pb-1 constants• At Tier-2’s: monitor incoming skim data; check/validate

– In parallel: run on older samples (for 2007 analyses). • All analyses must migrate to Tier-2s. Note this is mimicking life

(typically full analysis runs on data “version-1”.– Generate 50 Mevt Monte Carlo events

• CAF: first tests (data, code, organization) of “Express Line”– Three analyses: W/Z, Higgs and Z. Would be nice to also inject signals

(that go to the primary datasets at the Tier-2s as well). Currently in planning phase…

October Physics/Trigger week

• During Physics Week:– One session (half day) on CSA07

status/experience– Review of 2007 analyses (1.5-2 days)

• One plenary presentation per 2007 analysis• Analysis Notes must be ready by Oct 18

– Joint meeting with Trigger– Very preliminary: trying to organize a first

dedicated session on “demonstrating new physics”

End 2007 to 2008

• From Dec 07 to May 08: prepare for the actual data. Goals:– Have all the datasets and streams defined– Have all of the HLT code in place– Have all the trigger monitoring system (code + people) in place– Have all the Monte Carlo events in place– Have all the data-analysis organization (code + people) in place– Have analyses geared for 10 pb-1 and 100 pb-1 ready to absorb

the data• So, in the six months (Nov 07 to May 08), we have to

– Complete the 2007 analyses, injecting even more realism (noise, dead channels, really bad miss-reconstruction)

– Monte Carlo samples for the startup– Trigger and dataset studies

• End of CMS summary

Issues in this meeting

• Consideration of new members into India-CMS• Nature of CMS related work changing: focus shifting

from hardware (modulo upgrades) to data taking, software, physics. Need to re-organize.

• Physics group coordinators/conveners from India-CMS

• Date of next meeting

report to the collaboration & some news from sep 07 cms week india-cms collaboration meeting...

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