News from TrackingNews from Tracking

R. Meier Univ. Tübingen

Towards a straw tube tracker prototypeTowards a straw tube tracker prototype

PANDA outer tracking - status

Outer tracking subgroupOuter tracking subgroup

• JINR Dubna - Russia B. Morosov et al.

M. Sapozhnikov et al.• GSI Darmstadt - Germany

A. Sokolov et al.• INFN Frascati - Italy

P. Gianotti et al.• INFN Ferrara - Italy

D. Bettoni et al.• Jagiellonan Univ. Krakow

J. Smyrski• TU München - Germany

B. Ketzer et al.• Universität Tübingen - Germany

R. Meier et al.

• + +

Spokesperson: P. Gianotti

Joined Research Project Proposal for I3HPJoined Research Project Proposal for I3HP

JRA on the development of high speed gas detectors J. Wessels et al.JRA on the development of high speed gas detectors J. Wessels et al.

Approved

Joined Research Project Proposal for I3HPJoined Research Project Proposal for I3HP

JRP on the development of high speed gas detectors J. Wessels et al.JRP on the development of high speed gas detectors J. Wessels et al.

Approved

Charmonium States: FormationCharmonium States: Formation

Physics – charged particle trackingPhysics – charged particle tracking

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Charmed Hybrids: ProductionCharmed Hybrids: Production

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1

gccpp

/ J

2

KK

PANDA trackingPANDA tracking

Cylindrical trackerCylindrical trackerMicrovertex detectorMicrovertex detector

Mini driftchambers

Requirements: Vertex resolutionTrack resolutionMomentum resolutionDetection efficiency

Material budgetRate capabilityRadiation hardnessTrigger capabilitySpace budgetHeat budget

Physics benchmarks

Other

subd

etecto

rs

Beam/Target conditions

PANDA trackingPANDA tracking

Forward trackingForward tracking

Mini drift chambersMini drift chambers

2 Prototype designs2 Prototype designs

Krakow J. SmyrskiKrakow J. Smyrski Dubna M. SapozhnikovDubna M. Sapozhnikov

INTAS application

Krakow MDC prototypeKrakow MDC prototype

PANDA central trackerPANDA central tracker

Straw tube tracker

• Spacial resolution: 150 m (r,) 1mm (z)• Rate capability• Existing model: WASA straw tube tracker• 2LT Trigger capability

• Structure material• Not usable as Cerenkov medium• Amplifiers on tubes •Number of tubes = number of cables

Straw tube tracker

• Spacial resolution: 150 m (r,) 1mm (z)• Rate capability• Existing model: WASA straw tube tracker• 2LT Trigger capability

• Structure material• Not usable as Cerenkov medium• Amplifiers on tubes •Number of tubes = number of cables

Time projection chamber

• Spacial resolution 100 m (r,) 1mm (z)• Low material budget• Drift volume transparent • dE/dx information for low mom. PID

• No existing design capable of continous beam operation• New developments required: GEM readout• Trigger capability?• Single event reconstruction?

Time projection chamber

• Spacial resolution 100 m (r,) 1mm (z)• Low material budget• Drift volume transparent • dE/dx information for low mom. PID

• No existing design capable of continous beam operation• New developments required: GEM readout• Trigger capability?• Single event reconstruction?

STTSTT TPCTPC

Cylindrical tracker

STT TPC

Simulation group design

WASA based design

GEM readoutprototype

Physics Requirements BenchmarksFeasibility

Reality

Towards a PANDA cylindrical trackerTowards a PANDA cylindrical tracker

Detailed discussion: Next PANDA meeting

• 9000 straw tubes.• 15 double layers• 2-14 layers are skewed with angle between 4-9o

• tube length – 1.5 m• tube diameters 4, 6, 8mm• inner radius - 15 cm.• outer radius – 42 cm.

• 9000 straw tubes.• 15 double layers• 2-14 layers are skewed with angle between 4-9o

• tube length – 1.5 m• tube diameters 4, 6, 8mm• inner radius - 15 cm.• outer radius – 42 cm.

Straw tube tracker for PANDAStraw tube tracker for PANDA

The WASA mini drift chamberThe WASA mini drift chamber

25/26-Aug Mini subgroup meeting at Uppsala

1738 Straws 4,6,8 mm17 Layers

Inner/outer radius 4/20 cmStraw length 40 cm

The WASA mini drift chamberThe WASA mini drift chamber

Design position resolution: 150m/1.5mm

Mechanical precision and stability: ‘massive‘ support structures

Design position resolution: 150m/1.5mm

Mechanical precision and stability: ‘massive‘ support structures

Straws

BeamPellet

1.2 mm Be/Al Outer cover 1% rl Front/Back wire mounting rings >2% rl

1.2 mm Be Beam pipe 0.3% rlSensitive volume 0.5% rl

WASA-based design for PANDA?WASA-based design for PANDA?

Design parameters included in simulation (A. Sokolov)

Now Maybe?

MVD

Straws

DIRC

Beam pipe

Inner cover

Outer cover

Scintillator barrel

Towards a PANDA cylindrical trackerTowards a PANDA cylindrical tracker

WASA based design

Low density STT

Foamstructure

Pressure stabilization

Carbon fiber structure

Readout design Mechanical structure

TDR

Prototypes

Rate capabilityHeat budgetSpace budgetTrigger capability

Physics benchmarksOther subdetectors req.Space budget

Feasibility

Self-Supporting StrawsSelf-Supporting Straws

Self-Supporting StrawsSelf-Supporting Straws

Self-Supporting StrawsSelf-Supporting Straws

Wire position fixed by 1mm thick Cu-coated belt

Coming up: tracking, position resolution testsComing up: tracking, position resolution tests

PANDA PrototypesPANDA Prototypes

Objectives:• Wire material• Straw material• Gas mixture• Straw geometry• Electronic coupling/readout• gravitational sagging (spacers?)• mechanical precision• WASA-based construction• Self-supporting construction• Radiation hardness/lifetime• In-beam position resolution

Objectives:• Wire material• Straw material• Gas mixture• Straw geometry• Electronic coupling/readout• gravitational sagging (spacers?)• mechanical precision• WASA-based construction• Self-supporting construction• Radiation hardness/lifetime• In-beam position resolution

Timeline?• Prototype definition end of 2003• Prototype design/construction first half 2004• Prototype tests second half 2004

Timeline?• Prototype definition end of 2003• Prototype design/construction first half 2004• Prototype tests second half 2004

Possibilities:

• Lab single straw tests• WASA based prototype using existing material and installations • Self-supporting prototype based on Jülich construction• Cosmics tests• MIP tests (GSI, PSI)

Tracking subgroup meeting:

Sunday, 7-September 8:30 Room 4.140

Tracking subgroup meeting:

Sunday, 7-September 8:30 Room 4.140

Agenda:

1. Central tracking• STT vs. TPC• Simulations• STT prototype definition• Timeline

2. Forward tracking• Prototype plans• Timeline

3. Funding applications

Agenda:

1. Central tracking• STT vs. TPC• Simulations• STT prototype definition• Timeline

2. Forward tracking• Prototype plans• Timeline

3. Funding applications