1 / 24

SLAC BaBar Program

SLAC BaBar Program. Blair. Rainer. Aaron. Blair Ratcliff SLAC BaBar Program Manager June 2005. The BABAR Collaboration 11 Countries 80 Institutions 623 Physicists 49 Active SLAC Physicists. INFN, Perugia & Univ INFN, Roma & Univ "La Sapienza" INFN, Torino & Univ

xandy
Download Presentation

SLAC BaBar Program

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  2. The BABAR Collaboration 11 Countries 80 Institutions 623 Physicists 49 Active SLAC Physicists INFN, Perugia & Univ INFN, Roma & Univ "La Sapienza" INFN, Torino & Univ INFN, Trieste & Univ The Netherlands [1/4] NIKHEF, Amsterdam Norway [1/3] U of Bergen Russia [1/13] Budker Institute, Novosibirsk Spain[2/3] IFAE-Barcelona IFIC-Valencia United Kingdom [11/75] U of Birmingham U of Bristol Brunel U U of Edinburgh U of Liverpool Imperial College Queen Mary , U of London U of London, Royal Holloway U of Manchester Rutherford Appleton Laboratory U of Warwick USA[38/311] California Institute of Technology UC, Irvine UC, Los Angeles UC, Riverside UC, San Diego UC, Santa Barbara UC, Santa Cruz U of Cincinnati U of Colorado Colorado State Harvard U U of Iowa Iowa State U LBNL LLNL U of Louisville U of Maryland U of Massachusetts, Amherst MIT U of Mississippi Mount Holyoke College SUNY, Albany U of Notre Dame Ohio State U U of Oregon U of Pennsylvania Prairie View A&M U Princeton U SLAC U of South Carolina Stanford U U of Tennessee U of Texas at Austin U of Texas at Dallas Vanderbilt U of Wisconsin Yale Canada [4/24] U of British Columbia McGill U U de Montréal U of Victoria China [1/5] Inst. of High Energy Physics, Beijing France [5/53] LAPP, Annecy LAL Orsay LPNHE des Universités Paris VI et VII Ecole Polytechnique, Laboratoire Leprince-Ringuet CEA, DAPNIA, CE-Saclay Germany [5/24] Ruhr U Bochum U Dortmund Technische U Dresden U Heidelberg U Rostock Italy [12/99] INFN, Bari INFN, Ferrara Lab. Nazionali di Frascati dell' INFN INFN, Genova & Univ INFN, Milano & Univ INFN, Napoli & Univ INFN, Padova & Univ INFN, Pisa & Univ & ScuolaNormaleSuperiore DOE Program Review, SLAC, June 2005

  3. 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) Core Elements of BaBar Program DOE Program Review, SLAC, June 2005

  4. BaBar Manpower Distribution (%) DOE Program Review, SLAC, June 2005

  5. 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 SLAC Physics Program Support DOE Program Review, SLAC, June 2005

  6. Physics 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? DOE Program Review, SLAC, June 2005

  7. 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 Future Challenges-as Lumi Grows DOE Program Review, SLAC, June 2005

  8. L1 Trigger Upgrade (DCZ) Entire Drift-Chamber Trigger system replaced (except 1 BLT) to gain 3D tracking capability using stereo wires. ZPD • 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 BLT Full system physics run test July/04. Driving BaBar L1 since start of Run 5 Institutions:Bristol,Harvard, Iowa, Manchester, Oregon, RAL, SLAC DOE Program Review, SLAC, June 2005

  9. 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 DOE Program Review, SLAC, June 2005

  10. 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 DOE Program Review, SLAC, June 2005

  11. DCH Electronics UpgradeWhat 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 DOE Program Review, SLAC, June 2005

  12. Paths to solve it Phase 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) DOE Program Review, SLAC, June 2005

  13. 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. DOE Program Review, SLAC, June 2005

  14. New RPC belt New layer 10cm steel • Barrel • 6 Brass layers • RPC  LST • 2 sectors in 2004 • 4 more in 2006 5 layers of 2.5 cm brass Barrel IFR Upgrade DOE Program Review, SLAC, June 2005

  15. Broad Participation across collaboration IFR 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 DOE Program Review, SLAC, June 2005

  16. Readout 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. DOE Program Review, SLAC, June 2005

  17. CEH 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 DOE Program Review, SLAC, June 2005

  18. Peter Kim & Charlie Young LST Installation • New east platform for electronics • Special tooling for backward corner block DOE Program Review, SLAC, June 2005

  19. Bottom sextant before and after installation Backward side DOE Program Review, SLAC, June 2005

  20. Typical Plateaus • All good • Operated at 5500V DOE Program Review, SLAC, June 2005

  21. Efficiency DOE Program Review, SLAC, June 2005

  22. Muon Pair in LST Equipped Sectors DOE Program Review, SLAC, June 2005

  23. 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 p0p0 &, 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 fKs; B K+ K-Ks ; B KLKsKs Search for Exotic Baryons (Pentaquarks) Search for narrow mesonic resonances (Ds, X(3872), etc.) Inclusive Hadronic Spectra; p,K,p,f, h, Lc,…………….. Radiative Penguin decays; Inclusive b sg; Inclusive bdg ; B K*g; B rg; B fg; etc. ISR; Exclusive hadronic final states; Inclusive and exclusive measurements of R. Leptonic b & c decays; (e.g., B t n(e n)(m n) ; D mn; Ds mn (tn) Exclusive B decays; B p+p-p, K, K*; B h’K* See Aaron’s talk! Physics Analysis DOE Program Review, SLAC, June 2005

  24. 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 Summary DOE Program Review, SLAC, June 2005

More Related