Questions to sub-detector groups for the detector integration

1. All sub-detectors
   • overall sizes, especially outer and inner diameters and total length
   • total cross section of cables and pipes (gas and cooling material) and the maximum diameter among them in order to determine gaps between sub-detectors for them
   • support method/mechanism
   • alignment method, e.g. laser system- how to inject a laser beam, where the laser system is installed etc.
   • total weight
   • total electric power consumption
2. VTX and SIT
   • inner support tube inside of TPC is needed ?
     e.g. SIT and vacuum pipe are supported by the tube and VTX is mounted on the beam pipe. The tube is supported by TPC.
3. TPC
   • how much is the field uniformity ?
     - a LCTPC note will be available soon. It may discuss ;
     • field reproducibility during push pull
     • anti-DID field is not constant, i.e. it will be varied during experiments
     • requires precise field measurement and calibration at Z-pole
4. ECAL, HCAL
   • 8 or 12 fold symmetrical shape
     -A documentation will be prepared by T.Taheshita, which summaries advantages and disadvantages in each shape.
5. HCAL
   • module shape ? - conventional or Henri's one
   • need tail catchers behind the coil and in the endcap ?
6. COIL
   • sizes of cryostat, chimney and anti-DID coil
7. Anti-solenoid for permanent QD0 (option)
   • It will be buried in the endcap yoke. Y.Iwashita will study it.
8. MUON
   • need a contact person
   • especially number of layers are important and urgent to be decided.