Silicon Detectors for Charged Particle Tracking in CBM

1
Silicon Detectors for Charged Particle Tracking
in CBM
Compact Tracking Station

• Summary of activities
• Next steps
• Manpower and funding

2
Working group summary

• RD
• Radiation hardness
• cooling
• Sparsification
• Read-out concepts
• Time stamps

• Design constraint
• Granularity
• Resolution
• lt 10 mm
• Radiation hardness
• Fluences up to 1016 neq
• Material budget
• lt 0.3 X0 inner stations
• Speed

• Simulation
• Physics performance
• Open charm
• Low-mass dielectron
• Detector performance
• Tracking (matching)
• Delta electrons
• Digitizer

• Design
• Number of stations
• Position of stations
• Infrastructure (cooling, support, wires)
• Beam pipe

3
Resolution, Granularity

• Concerns
• Vertex reconstruction
• Momentum resolution
• Track matching
• Investigation
• Simulations with next to realistic digitizers
• Pixel detectors GSI
• SINP Strip detectors SINP, GSI
• Tracking algorithms Heidelberg, Mannheim, Dubna
• To-do
• Tracking in magnetic field
• Optimization of number of tracking stations and
  resolution
• Seeding

4
Radiation hardness

• Concerns
• Integral dose extremely high
• Scenario
• Strongly differential fluence
• Replace detectors regularly in high dose region ?
• Investigation
• RD on MIMOSA IReS, GSI
• To-do
• RD
• Will be partly covered by the I3HP proposal
• Better estimate on expected fluence per physics
  program
• Beam intensity, - quality, - pipe

5
Material Budget

• Concerns
• Vertex reconstruction
• Secondary particle production
• Momentum resolution
• Investigation
• Generic simulations many
• Open charm case GSI
• Low-mass electron pairs Krakow
• Status
• No dramatic effecton vertex resolution

6
Speed

• Concern
• Fast readout of MAPS
• Scenario
• up to 10 MHz minimum bias reactions
• Detector driven read-out
• Good time resolution (strip detectors)
• Trigger capability
• Investigation
• Sparsification, digitization on chip
• To do

7
Next steps

• 2nd generation simulation
• based on existing UrQMD events
• include
• next to realistic detector geometry with support
  and infrastructure
• digitizer to simulate pixel/strip response
• simulation of pile up
• Detector design
• Arrangement of the sensor chips
• Realistic infrastructure
• RD activity
• Continued at IReS
• readout speed
• Start it at GSI
• Cooling