MuCap structure

[Rick Luther <rluther@voyager.net>]

Gentlemen:

We have a couple of questions about design approach that we hope you can 
answer for us.

1.  For the frame supporting the detector, one of you had stated that the 
rings should be aluminum, but that the rest could be steel.  I had assumed 
you meant stainless steel for magnetic reasons, but Larry suggested that 
may not be the case.  Is carbon steel acceptable anywhere?  Painted carbon 
steel would certainly be less expensive than stainless or aluminum.

2.  Is a welded structure acceptable, or would you prefer that everything 
be bolted together.  This may be affected by the organizations that 
fabricate the components and assemble them on-site.  Welded would probably 
be cheaper, but we are concerned that welding may not be easy for one or 
more of the groups involved.

3.  With regard to rails, it would be useful to know at least a rough 
estimate of the distance between the rails as soon as possible.  This could 
affect some of our conceptual design decisions.

4.  Are the electronics racks 19" x 22" and is the 19" dimension parallel 
to the beam line?  Do you have an estimate of the height?  If there are 
cables attached to the backs of the cabinets, how much clear space should 
we leave between the cabinets and the gondola channels?

Regards,
Rick Luther