[Tpe] TPE Mini Torus Shielding

[Larry Weinstein]

Dear Dave,

I don't quite understand the drawing and description.  I assume that the 
downstream SS tube is the 2.190 ID piece and that the upstream SS tube 
is the 3.140 ID piece.  Is the item labelled 'SS Mandel' the plate you 
referred to?

We  have the beam halo (that part between 2.19 and 3.14" ID) showering 
in lead.  The 'SS Mandel' will have the beam start showering in the SS 
and then finish in the lead.  I do not think that adding an aluminum 
insert will help.  Our goal was to have the shower start deep in the 
'cone shielding' to minimize the number of particles that could be 
emitted from its opening.

I would skip the Aluminum insert, but everything else looks good.

David Kashy wrote:
> Hi All,
> Attached is a pdf file of my concept for the shield.
>
> I'll describe it here
>
> There is are two different stainless steel tubes that are connected by 
> a plate. The smaller tube goes through the bore of the Mini T. The 
> larger tube is is nearest the target.
> There is a machined piece of lead that surrounds the larger tube and 
> goes after the stainless plate too. The lead down stream of the cone 
> between the Mini T coils will be cut to fit by hand. It will be held 
> in place by 1/8" thick aluminum plates (likely screwed into the lead).
> One new idea is to put a ring on the inside of the large Stainless 
> tube to modify the shower that would have been created by the 
> stainless steel plate. It could be tungsten or aluminum or lead. the 
> last piece is an aluminum centering tube at the down stream end of the 
> mini Torus.
>
> Again we need to get going on this procurement ASAP so please let me 
> know when you decide if you like this design and if you can whether of 
> not we want that insert and if so what material would be best.
>
> Thanks
> Dave

-- 
				Sincerely,
				Larry

-----------------------------------------------------------
Lawrence Weinstein
University Professor
Physics Department
Old Dominion University
Norfolk, VA 23529
757 683 5803
757 683 3038 (fax)
weinstein at odu.edu
http://www.lions.odu.edu/~lweinste/