Armand Zylberstejn

1

Tevatron and Collider Detector Upgrades

• Armand Zylberstejn
• DAPNIA/SPP Saclay
• for the DÆ and CDF Collaborations
• Main Injector Project
• DÆ and CDF Upgrades
• Physics Goals for Run II
• Beyond Run II
• Conclusions
• Moriond Electroweak March 1998

2
Tevatron In the 90 s

• Fermilab p p-bar collider
• With Ös 1.8 TeV highest energy accelerator
  since mid-80s
• Peak luminosity of 1.6 x1031cm-2s-1
• ò L dt .12 fb-1 delivered to CDF and D0 during
  1992-1996 (Run I)
• Many exciting studies including
• Discovery of Top quark W Mass measurement
• Limits on triboson Anomalous Coupling
• Limits on leptoquarks , on Supersymmetric Squark,
  Gluino,Stop
• Test of QCD b-quark physics
• x10 integrated luminosity achievable with
  machine/detectors upgrades
• Goal ò L dt 2 to 4 fb-1

3
Motivation for Factor 10 in integrated luminosity

• Probing the Standard Model
• Continuation of present Tevatron physics
  program with some shift in emphasis
• From discovery to precision measurements (top
  mass, W mass, ...)
• Constrain the Higgs Boson Mass
• Improvements to B physics capabilities (Bs
  mixing, approach to CP violation, )
• Beyond the Standard Model
• Significant improvements to physics reach
  few fb-1 data samples allow significant increases
  in the reach for SUSY, leptoquarks, further
  W,Z,anomalous couplings.

4
Main accelerators

• Key to increasing the luminosity is to increase
  the number of p in the ring2 new accelerators
• Main Injector 120 GeV accelerator replaces Main
  Ring (First Fermilab accelerator) as injector
  for Tevatron and for production of p
• Admittance adapted to the 8 GeV booster
• Fast cycling (1.5 s)
• High duty factor for fix targert expt. during
  collider runs
• Recycler new p recycling ring
• Permanent magnets
• Storage for cooled p, recycle p-bars from current
  store
• allows shorter store durations

5
Run II Parameters
6
Beyond run II TeV33

• Goalaccumulate before 2006
• ò L dt 10-30 fb-1
• Gain another factor 5 in luminosity dL/dt 1
  1033 cm-2 s-1
• p-bar production rate and stacking rate improved
• electron cooling in the Recycler
• nb. of bunches increased to 90 (148)
• beams at an angle (140 mrad likely)
• average nb. of events/collision 13
• Upgrade detectors

7
Detector Upgrades

• Build on existing strengths to identify leptons,
  photons, and jets
• Accomodate higher luminosity and shorter bunch
  spacing times
• New tracking detectorsImprove muon systems
• New readout electronics with pipeline storage
• High rate trigger and DAQ system
• Add new capabilities to improve physics reach
• Solenoid and silicon for DÆ
• Standalone silicon tracking and silicon vertex
  tracker (L2) for CDF
• Displaced Vertex trigger for CDF (likely for DÆ)
  ? trigger on b quark