JLC CDC

The total numbers of wire : 11500The total wire tension : 50 tMaterial : outer cylinder --- 5 mm thick CFRP end-plates --- 25 mm thick aluminum

TESLA TPC

Material distributions ofTESLA tracking system(a) Function of the radius at polar angle θ= 90°(b) Function of θfor the different detectors

TPC

Mechanical parameters

TESLA TPC

Design of end plate for GEMs or Micromegas --- inside: GEM or Micromegas modules --- outside: readout electronics (analog and digital) 0.6 million pads /side!

ALICE TPCALICE --- A Large Ion Collider Experiment at the CERN LHC

Material:Outer vessel(r = 5.6m L = 5.5m) --- carbon-fibre composite and Aramid fibre honeycomb (NOMEX)End flanges --- corbon-fibre composite

Inner radius: 0.88 mOuter radius: 2.50 mLength: 5m

ALICE TPC

Main problem!

STAR　 TPCSTAR --- The Solenoidal tracker at RHIC

R = 4m, L = 4.2mDrift Gas : P10Pressure: atmospheric+ 2 mbarReadout: MWPC with pad (136608 pads) End plate: aluminum

STAR TPCMaterial thickness for the inner(IFC) and outer(OFC) electrostatic filed cages