CBM: Silicon-Strip Tracker Design

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CBM Silicon-Strip
Tracker Design
Valeri Saveliev, Obninsk State University 9-03-200
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CBM Collaboration Meeting, GSI, Darmstadt
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CBM Si-strip Tracker
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CBM STS General
Considerations
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CBM STS General
Considerations
(Future) GSI CBM
Rate (Hz)
ATLAS CMS
ALICE TRD L1 Trigger
Large Number of Channels High Bandwidth
High Archival Rate (PetaBytes/a)
0.1 TB/sec
Event Size (bytes)
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CBM STS General
Considerations
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HERA-b Vertex
Detector (Stereo angles)
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HERA-b Vertex
Detector (Stereo angles)
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LHCb Inner
Tracker (Stereo angles)
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LHCb Velo
Tracker (R,f )
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CBM
Si-strip Tracker
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Si-Strip Tracker Geometry
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Si-Strip Tracker Geometry
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Si-strip Tracker MC
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CBM Geant 4
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Occupancy
of Si-Strip STS
STS_4
STS_5
STS_6
STS_7
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Occupancy of
Si-Strip Tracker
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Basic
Technology of Si-strip Tracker
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Resolution
of Si-Strip Tracker
Y position of strip
s2
150
s2
s1 const ( 8 microns )
450
X position of strips
900
s2
s1
s1
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Fake Hits of
Si-Strip Tracker
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Si
strip Tracker Layout
Feature Value/Quantity
Angular coverage 50 to 500 mrad
Number of super layers 4
Detector modules per plane 28-60
Detector thickness 100-150 µm
Sensitive detector area 20x20 cm2 to 50x50 cm2
Operational temperature 40C
Strip pitch 25 µm
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STSHitProducer
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STSHitProducer
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STSHitProducer
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STSHitProducer
20 cm
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STSHitsProducer
DeltaX, DeltaY between points real heats in
STS4 inner wafer
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STSHitsProducer
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STSHitsProducer
DeltaXErr, DeltaYErr between points real
heats in STS4 inner wafer
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Basic
Technology of Si-strip Tracker
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Basic
Technology of Si-strip STS
Sensors are 4 , 300 µ thick, double-sided, 70
40.1 mm2, 110 µ/208µ readout pitch (p junction
side/n ohmic side). A set of strips are
connected in serpentine thus strips with
following length 28 cm, 56 cm, 112 cm and 224 cm
are tested.
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Si-Strip Tracker Geometry
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CBM
STS R-f Sensors
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CBM STS R-f Sensors
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CBM STS R-f Sensors
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Summary

• Si strip Layout with stereoangles is under
  investigations
• New Geometry is implemented
• Layout of the Si-Strip STS is fixed for first
  analysis
• Definition of the Hits Structure and
  HitsProduser are implemented

• Analysis of Si-strip Tracker with current Layout

• R-f topology will be included in analysis