DOE Program Review, SLAC, June 2005 1 SLAC BaBar Program Blair Ratcliff SLAC BaBar Program Manager...

DOE Program Review, SLAC, June 2005

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SLAC BaBar ProgramSLAC BaBar Program

Blair Ratcliff

SLAC BaBar Program Manager

June 2005

Blair Rainer Aaron


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INFN, Perugia & UnivINFN, Roma & Univ "La Sapienza"INFN, Torino & UnivINFN, Trieste & Univ

The Netherlands [1/4]NIKHEF, Amsterdam

Norway [1/3]U of Bergen

Russia [1/13]Budker Institute, Novosibirsk

Spain [2/3]IFAE-BarcelonaIFIC-Valencia

United Kingdom [11/75]U of BirminghamU of BristolBrunel UU of EdinburghU of LiverpoolImperial CollegeQueen Mary , U of LondonU of London, Royal Holloway U of ManchesterRutherford Appleton LaboratoryU of Warwick

USA[38/311]

California Institute of Technology

UC, IrvineUC, Los AngelesUC, RiversideUC, San DiegoUC, Santa BarbaraUC, Santa CruzU of CincinnatiU of ColoradoColorado StateHarvard UU of IowaIowa State ULBNLLLNLU of LouisvilleU of MarylandU of Massachusetts, AmherstMITU of MississippiMount Holyoke CollegeSUNY, AlbanyU of Notre DameOhio State UU of OregonU of PennsylvaniaPrairie View A&M UPrinceton USLACU of South Carolina

Stanford UU of TennesseeU of Texas at AustinU of Texas at DallasVanderbiltU of WisconsinYale

Canada [4/24]U of British ColumbiaMcGill UU de MontréalU of Victoria

China [1/5]Inst. of High Energy Physics,

Beijing

France [5/53]LAPP, AnnecyLAL Orsay

The BABAR Collaboration

11 Countries 80 Institutions623 Physicists

49 Active SLAC Physicists

LPNHE des Universités Paris VI et VII

Ecole Polytechnique, Laboratoire Leprince-Ringuet

CEA, DAPNIA, CE-Saclay

Germany [5/24]Ruhr U BochumU DortmundTechnische U DresdenU HeidelbergU Rostock

Italy[12/99]

INFN, BariINFN, FerraraLab. Nazionali di Frascati dell'

INFNINFN, Genova & UnivINFN, Milano & UnivINFN, Napoli & UnivINFN, Padova & UnivINFN, Pisa & Univ &

ScuolaNormaleSuperiore


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Core Elements of BaBar ProgramCore Elements of BaBar Program

• Computing: Provide infrastructure, support, and management (Rainer)

• Detector: Provide infrastructure, support, engineering and technical support, and management (David)

• Physicist Collaborators (SLAC BaBar)– Computing (Rainer)– Structure and Leadership (Blair)– Detector Upgrades (Blair)– Physics Analysis (Aaron)


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BaBar Manpower Distribution (%)BaBar Manpower Distribution (%)

Total BaBar Manpower Distribution (%)

Computing37%

Eng/Tech & Admin25%

Physics38%


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SLAC Physics Program SupportSLAC Physics Program Support• Detector Operations & “Service”

– (~0.6 of Active Physicist FTEs, ~2x nominal collaboration average) – Significant role in most detector systems, MDI, computing, etc.

• Detector and Computing Upgrades• Physics Analysis• Leadership

– Collaboration Management• Technical Coordinator• Computing Coordinator• Deputy Computing Coordinator

– Operations and Technical• Operations Manager• System Leadership & Technical Board

– DCH– DIRC– Trigger

– Physics and Tools Convenors (7/41 (March Snapshot))• Pentaquark Task Force• Hadronic Spectra• Radiative Penguin• 3 body Charmless• Two Body Charmless• PID

– Standing and Ad-hoc Committees • Exec board; Speakers Bureau; Pub Board; CM2 Oversight; Roadmap Committee; Membership Committee; etc..

• Detector R&D


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Physics Program Support-EducationPhysics Program Support-Education

• 10 Stanford Ph.D. Graduate Students.

• Research Associates– Typically 10-14 – How many do we

turnover? 11 in last two years

– Where are they now?

Next Position for RAs Departing 2003-2005

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1

2

3

4

5

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Particle Physics Astro-ParticlePhysics

Other PhysicsRes.

Industry

Num

ber


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Future Challenges-as Lumi GrowsFuture Challenges-as Lumi Grows

• Collaboration Manpower Base is ~static now, but….– Ever larger data sets for Physics Analyses– Necessary Computing Capacity Growth– Luminosity/Background growth.– Pressure on total manpower as LHC draws closer, and

experimental data taking ends. At least flat (increasing?) need for SLAC operational support.

• Detector Upgrades to cope with increasing backgrounds at high lumi– Trigger– DCH Electronics– IFR Barrel


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L1 Trigger Upgrade (DCZ)L1 Trigger Upgrade (DCZ)

Institutions: Bristol, Harvard, Iowa, Manchester, Oregon, RAL, SLAC

8 new ZPDs (Z-Pt-Discriminators) for 3D tracking 24 new TSFs (Track Segment Finders) Interface cards (at back of rack): 24 TSFi, 8 ZPDi and 1 GLTi

TSF

ZPD

BLT

Entire Drift-Chamber Trigger system replaced (except 1 BLT) to gain 3D tracking capability using stereo wires.

Full system physics run test July/04.Driving BaBar L1 since start of Run 5


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• Running since July 29, 2004.

• DCZ does its job just as well as we hoped

– Finding tracks and measuring z0 and pT

• How is this information used?

– ZPD can count tracks with cuts on |z0| and |1/pT|

– GLT can combine “Z tracks” with other trigger objects

• It’s a balancing act– Physics efficiency (which physics?) and robustness– Maximum reduction of L1 trigger rate

Bottom Line on L1 Trigger Rate


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L1 Trigger Upgrade (DCZ)L1 Trigger Upgrade (DCZ)

A conservative start with loose cuts to ensure physics efficiency well preserved.

Reduced L1 rate by 18%(excluding the test 1Z addition)

Configuration study in progress for significantly larger background reductions (e.g. require 1 -ve track OR 1 high Pt +ve track with |Z0|<cut, which were not available with the old DCT system)

Will be essential when luminosity significantly exceeds 1034


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DCH Electronics UpgradeDCH Electronics UpgradeWhat was the problem ?What was the problem ?

• DCH waveform data shipping from front-end causes dead time

(very non-linear!)• In 2003 the problem was anticipated

to become serious soon due to increasing luminosity and trigger rates

• SLAC involvement: Problem identification, solution recommendation, board redesign, QC.

• SLAC manpower: 5 physicists, 2 engineers, students

• Collaborating Inst: SLAC ISU, Notre Dame


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Paths to solve itPaths to solve itPhase I• reduce sampling of raw waveform (32 16 bytes)• Firmware change (PROM) on front-end board• Fully implemented in Summer 2004 shutdown (2 weeks)• Data quality is not compromised

Phase II• Run feature extraction in front-end, data reduction of factor 4• Board redesign including modified FPGA• TDR in Dec ‘04; final design ready; full implementation during

Oct ’05 shutdown• Test boards have been put on chamber since Jan ‘05 to

evaluate performance. • SEU from neutrons might become a problem (20 functional

upsets per day in 2007) and maybe need attention starting Nov ‘05 (Phase III)


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IFR Upgrade (Barrel RPCs to LSTs)IFR Upgrade (Barrel RPCs to LSTs)

• Jan. ’03: Deteriorating performance of Barrel IFR RPC’s leads to decision to replace with LST’s

• Oct. ‘04: First 2 sextants installed.• 8/06-11/06: Final 4 sextants installed. Delayed

from summer 05 by change in PEP schedule.


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Barrel6 Brass layers RPC LST2 sectors in 20044 more in 2006

Barrel IFR UpgradeBarrel IFR Upgrade

New layer

New RPC belt

10cm steel

5 layers of 2.5 cm brass


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Broad Participation across collaborationBroad Participation across collaboration

IFR Barrel Upgrade ResponsibilitiesIFR Barrel Upgrade Responsibilities

INFN: Ferrara, Frascati, Genova, Padova, Roma, Torino

US: LLNL, Ohio State, Oregon, Princeton, SLAC, UCSD

LST Tube Production and Factory QA; Front End Electronics; Installation

Readout Planes; Module Assembly; Module QC; HV System; Cabling; Gas System; Installation


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Readout Plane ProductionReadout Plane Production

• Manufactured at SLAC using “Large scale lamination.”

• Only Z-planes provide a position. Phi planes serve as the ground plane and transmit wire signals to forward end.

• Manufactured at SLAC using “Large scale lamination”

• Production of all planes completed by Fall 2004.


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CEH QC AreaCEH QC Area

• QC being done at CEH• First 2 sextants had 0

bad wires out of ~2000• QC continuing on

modules for ‘06. Last shipment expected this week

• Simultaneously testing HV cables and supplies


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LST InstallationLST Installation

• New east platform for electronics

• Special tooling for backward corner block

Peter Kim & Charlie Young


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Backward side

Bottom sextant before and after installationBottom sextant before and after installation


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Typical PlateausTypical Plateaus

• All good• Operated at 5500V


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EfficiencyEfficiency


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Muon Pair in LST Equipped SectorsMuon Pair in LST Equipped Sectors


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Physics AnalysisPhysics Analysis

• Fully collaborative physics analysis model….. across institutions and groups.

• Broad program. Many different “key” results.• Some examples of SLAC BaBar’s interests:

– CP Violation in B 00 &, more generally, B mm’ where m and m’ are charmless mesons.

– Inclusive semi-leptonic B decays and the extraction of |Vub| & |Vcb|– CP Violation and search for new physics in B Ks ; B K+ K-Ks ; B KLKsKs

– Search for Exotic Baryons (Pentaquarks)– Search for narrow mesonic resonances (Ds, X(3872), etc.)– Inclusive Hadronic Spectra; K,p,,c,……………..– Radiative Penguin decays; Inclusive b sInclusive bdK*; B;

B; etc.– ISR; Exclusive hadronic final states; Inclusive and exclusive measurements of R.– Leptonic b & c decays; (e.g., B e D Ds – Exclusive B decays; B p+p-’K*

• See Aaron’s talk!


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SummarySummary

• SLAC BaBar:– Provides infrastructure, management, and

technical support for detector and computing.– Physics groups partner with the Collaboration

on analysis, & operations.– Aaron Physics– Rainer Computing

DOE Program Review, SLAC, June 2005 1 SLAC BaBar Program Blair Ratcliff SLAC BaBar Program Manager...

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