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Advancements in DØ Upgrade and Tevatron Innovations

The DØ collaboration at Fermilab is embarking on a significant upgrade to enhance the capabilities of the Tevatron. This includes advancements in calorimeter electronics, silicon tracking systems, and new trigger methodologies aimed at improving data collection and analysis. The aim is to sharpen thresholds, enhance background rejection, and include crucial physics parameters such as displaced vertices. As the team evolves, key efforts will focus on recruiting talent and integrating innovative engineering solutions to maintain the Tevatron's leadership in particle physics research.

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Advancements in DØ Upgrade and Tevatron Innovations

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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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