Re: st.steel inserts in collimator cave sweep magnet

[Alexander Somov <somov@jlab.org>]

Hello Richard,

Tim and Slava Razmyslovich took a look on the 1st sweeping
magnet some time ago. It's difficult to see the structure
of the magnet without disassembling it (which is not easy).
However Elton found Fermilab specifications for this magnet.
According to them, the alluminum part seems to be a solid
block going through the whole magnet.

I put magnet's pictures (made by Tim/Slava) and technical
design doc to the wiki "Photon beam pipe" page.

Cheers,
       Alex





On Tue, 17 Mar 2009, Richard Jones wrote:

> Alex,
>
> I wonder if there is one of these permanent magnets somewhere that you could 
> go and take a look at?  I think it is important whether the cross sections 
> shown in the note 599 are continuous along the length or whether some of the 
> elements (eg. aluminum spacers) are intermittent.  There is a lot of iron in 
> the simulation, and if the real magnets have large gaps with aluminum blocks 
> in between then this should be changed in the simulation because holes in 
> this region could make a difference in the muon flux at the detector.
>
> -Richard Jones
>
> Alexander Somov wrote:
>> Hello Richard, Tim,
>> 
>> I took a layout of the 1st sweeping magnet from the
>> GlueX-doc-599. The magnet is mostly made of Fe (plates
>> close to the pipe) and Ferrite (rho ~4-5 g/cm3).
>> There are also few Al blocks on the left/right sides
>> of the pipe. As exact dimensions of constituent
>> blocks are not listed in the note I simplified geometry
>> and used iron  everywhere. I think that it's a
>> reasonable assumption given that the 1st sweep is very
>> long.
>> 
>> Cheers,
>>       Sascha
>> 
>>> 
>> 
>
>