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The Bright Future

The Bright Future. We won’t rest on our Laurels ! Tevatron is Changing…. So will DØ…. DØ Run II. Tevatron Upgrade. (some) Run II Topics. D  Upgrade. Columbia Leadership Upgrade Co-Leadership: Tuts Calorimeter Electronics: Kotwal,Tuts Silicon Trigger: Evans,Gara

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The Bright Future

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  1. The Bright Future • We won’t rest on our Laurels ! • Tevatron is Changing…. • So will DØ…. DØ Run II H.Evans / NSF Site Visit

  2. Tevatron Upgrade H.Evans / NSF Site Visit

  3. (some) Run II Topics H.Evans / NSF Site Visit

  4. D Upgrade • Columbia Leadership • Upgrade Co-Leadership: Tuts • Calorimeter Electronics: Kotwal,Tuts • Silicon Trigger: Evans,Gara • Muon L2 Trigger: Evans,Gara H.Evans / NSF Site Visit

  5. D Upgrade Forward Scintillator + New Electronics, Trig, DAQ Central Scintillator New Solenoid, Tracking System Si, SciFi,Preshowers Forward Mini-drift chambers Shielding H.Evans / NSF Site Visit

  6. Trigger System • Too Much Physics ! • Trigger (132 ns between collisions) • Sharp Thresholds • Multi-Component Correlations • Don’t Forget: Multiple Interact’s • 3 Level System in D H.Evans / NSF Site Visit

  7. Silicon Tracking • 4 Layers Double Sided Strip Detectors • 6 Barrel segments (30° wedges) • All Have r Readout: res • Layers 1,3: 90 strips (10mm res) 2,4: 2° stereo (30mm res) • 72 cm coverage (beam sz = 25 cm) • 12 F-Disks / 4 H-Disks • Forward Coverage • Total Channel Count: 793K H.Evans / NSF Site Visit

  8. Si Track Trigger Preprocessor • Silicon Track Trigger [MRI]Include Si Info onto Tracks at L2 • rf Info only  PT , f0 , Impact Param • Sharpen PT Thresholds • Include Impact Param Info • Displaced Vertices • A Few Benefits….. • Zbb for Jet E-Scale • 4 better Bgd Rejection for WH0 • Z Vertex Trigger [KDI]Calc z-positions of Interactions • 90° stereo • Sharpen ET Thresholds • ID Multiple Interactions • s ~ 500 mm (beam sz = 25 cm) H.Evans / NSF Site Visit

  9. B Decay Products B-Hadron: Flight Length ~ mm’s Decay Vertex Collision Impact Parameter Impact Parameter • Impact Parameter Resolution: • 50 mm PT = 1 GeV • 15 mm PT = 10 GeV H.Evans / NSF Site Visit

  10. STT Preprocessor SMTDetector CFT Tracks(L1 Trig) Cluster Finder Associate Clustersto Tracks 50 ms Time Budget Re-Fit Trackw/ Si Clusters Global L2 Trigger H.Evans / NSF Site Visit

  11. SVTZ Preprocessor • Vertices from all possible Layer 1,3 hit combinations (in 30° sector)  histo • Z-Positions of True Vertices  Peaks in Histo SMTDetector Cluster Finder Histogram Accumulator Feature Finder Global L2 Trigger H.Evans / NSF Site Visit

  12. Columbia Directions • Hardware: • Calorimeter Electronics • Silicon Track Triggers • Muon L2 Trigger • Analysis: • Electroweak • B-Related Topics • Fermilab SUGRA Working Group • People: • In process of hiring a new Postdoc • Increased use of Nevis Engineering • Actively Recruiting Grad/Undergrad Students • High School Student Involvement H.Evans / NSF Site Visit

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