Draft Qs to sub-detector groups for the integration, 15/07/08

File contents

<h1>Questions to sub-detector groups  for  the detector integration</h1>

Questions are listed below;
<ol>
<li>All sub-detectors
<ul>
<li>overall sizes, especially outer and inner diameters and total length
<li>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
<li>support method/mechanism
<li>alignment method, e.g. laser system- how to inject a laser beam, where the laser system is installed etc.
<li>total weight
<li>total electric power consumption
</ul>
<li>VTX and SIT
<ul>
<li>inner support tube inside of TPC is needed ?<br>
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.
</ul>
<li>TPC
<ul> 
<li>how much is the field uniformity ?<br>
- a LCTPC note will be available soon.  It may discuss ;
<ul>
<li>field reproducibility during push pull
<li>anti-DID field is not constant, i.e. it will be varied during experiments
<li>requires precise field measurement and calibration at Z-pole
</ul>
</ul>
<li>ECAL, HCAL
<ul>
<li> 8 or 12 fold symmetrical shape<br>
-A documentation will be prepared by T.Taheshita, which summaries advantages and disadvantages in each shape.
</ul>
<li>HCAL
<ul>
<li>module shape ? -  conventional or Henri's  one
<li>need tail catchers behind the coil and in the endcap ?
</ul>
<li>COIL
<ul>
<li> sizes of cryostat, chimney and anti-DID coil
</ul>
<li>Anti-solenoid for permanent QD0 (option)
<ul>
<li>It will be buried in the endcap yoke. Y.Iwashita will study it.
</ul>
<li>MUON
<ul>
<li>need a contact person
<li>especially number of layers are important and urgent to be decided.
</ul>
</ol>
We would like to distribute these questions to sub-detector contact persons 
as soon as possible for efficient discussion at the ILD Cambridge meeting.