10-Minute Overview of North American Tracking R

1
10-Minute Overview of North American Tracking RD

• Amsterdam LC Tracking Review
• March 30, 2003
• Bruce Schumm/UC Santa Cruz

2
Background
Three main RD thrusts

• Simulation
• Gaseous Tracking (TPC)
• Solid-state Tracking (mstrips, Si drift)

Support for Detector RD

• Re-direction of effort of base program
  (discretionary)
• Generic RD programs (ADR program of US DOE)
• UCLC/LCRD consortia of (Natl Sci Foundation/Dept
  of Energy) University Groups 1M in limbo

3
North American L Tracker
4
North American SD Tracker
5
Simulation
Refine Tracker Requirements

• SUSY (central at Michigan, forward at UCSC)

Explore Alternatives (not yet fully underway)

• TPC vs silicon drift
• All-axial central m-strip tracking
• Forward tracking scenarios
• With GEANT-based background included

Tracking/Calorimeter Interface Issue

• Track-cluster matching
• Calorimeter-assisted VEE finding

6
Unique Hardware Proposals
Scintillating fiber intermediate tracking layers

• Timing
• Pattern recognition

Negative-ion TPC

• Low diffusion, high gain (single e- detection)
• Good quenching

7
Gaseous Tracking
Several Canadian and US groups

• Explore readout choice and design
• Gas selection (neutron backgrounds, diffusion)
• Compact electronics

Test chambers

• Carleton
• Victoria
• Cornell (in production)

GEM Production

• MIT (Microsystems Technology Laboratory)
• Louisiana Tech (proposed m-machining, laser
  drilling)

8
Solid-state Tracking
Long Shaping-Time m-strip (Funded DOE ADR
program)

• Ultra-thin (momentum resolution, energy-flow)
• ASIC under development at UC Santa Cruz
• Long (2m) ladders under development at UCSC

Silicon Drift RD (Wayne State, Brookhaven)

• Intrinsically 3-dimensional
• Proven (STAR VTX detector at RHIC)
• Longer, thinner sensors low-power readout

Mechanical Issues

• Space frame
• Interferometric position monitoring (Michigan)

9
Solid State Tracking II
Some New Developments
SiLC Group International RD consortium to
address all aspects of Si tracking at a LC
(exclusive of CCDs)

• Large-area central tracker
• Si Envelope
• Forward tracking planes

SLAC effort (with UCSC, others?) to flesh out
long shaping-time central tracking option
(TDR-level study)
gt Simulation as well as hardware RD
10
Summary
Tracking RD still considered to be wide-open
Working towards wrapping up general RD phase in
3 years choose between gaseous, solid-state
options (maybe two detectors?)
Funding remains tentative awaiting release of
300-400 K for basic RD
Most of activity happening in context of strong
and growing international consortia