[Tpe] TPE Mini Torus Shielding

[David Kashy]

Larry,
The stainless steel plate has a tube welded to it on each side. On the 
upstream end it is 3-1/8"od x 0.035" wall tube on the down stream end it 
is a 2.25" od tube with a 0.065" wall and then the OD is machined down 
to 2.170" od to slide into the bore in the mini torus. This entire 
assembly is the "mandrel".

If all is good we will proceed.

Thanks
Dave



Larry Weinstein wrote:
> 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
>