Re: Penultimate assembly is up...

[Peter Kammel <kammel@npl.uiuc.edu>]

Dear Larry,

Thanks for your mail and explanations. I will start a last voyage
into the drawing at home tonight, because my faster notebook is there.

Stainless steel is fine for the rod, please choose stainless with
small magnetic mu (it need not be an exotic very low mu kind). 

Final comments will follow tonight.

Best regards

Peter


On Wed, 21 Aug 2002, Larry Bartoszek wrote:

> Dear Peter,
> 
>      I have made all the changes but one.  The only thing I haven't done is
> designed the clamps that hold the upper and lower frames together during
> crane handling.  The upper and lower ring halves are connected by a bolted
> connection, the wire chamber support rods have been moved out .1" radially
> and shortened in z, I've added lifting lugs on the frame, and corrected a
> few errors and missed holes.  I've also added a new trapezoidal shear plate
> to the lower ring structure to stiffen the legs further.
>      There are two new smallish zip files at ftp.bartoszekeng.com/pub/mucap
> .  finaldetsup.zip is the model.  The other is the first batch of 2Ds for my
> draftsman in CO.
>      Let me know if there is something else that needs doing or fixing.  I
> had to make the adjustment plate that holds up the wire chambers thicker,
> from .5" to .625" because the adjustment screws were only half on the edge
> of the plate.  This makes the gap between the ring structure and the TPC
> gantry go down to about 1 cm, but I thought that was still enough.  If it
> isn't you can always notch the center of this plate.
>      Rick has been doing some backup calcs on parts for me and it looks like
> we need to make the wire chamber support rods out of stainless steel to keep
> the deflection down.  Aluminum bends 3 times more than steel because of its
> elastic modulus, so this substitution works fine mechanically.  Let me know
> if there is some reason not to change these rods to stainless.
>      I plan to write out the rest of the 2Ds on Thursday because I'll be
> driving all day today.  Chris will probably not be finished with the first
> batch of details by the time I send the rest.  Talk to you soon.  If you
> have any trouble unzipping the model file contact me by cell phone ASAP and
> I'll resend it.
> 
>                       Ciao,
>                       Larry
> 
> Bartoszek Engineering-- www.bartoszekeng.com
> 

Peter Kammel  /  pkammel@uiuc.edu
Department of Physics, Loomis Laboratory
University of Illinois at Urbana-Champaign
1110 West Green Street, Urbana, IL 61801 
Tel (217) 333-5424 / Fax (217) 333-1215