Re: st.steel inserts in collimator cave sweep magnet

[Alexander Somov <somov@jlab.org>]

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



On Tue, 17 Mar 2009, Richard Jones wrote:

> Tim,
>
> I am reviewing the simulation geometry for the collimator cave, and note that 
> there are rectangular inserts filling the region between the poles of the 
> permanent magnet that serves as sweep magnet number 1.  The material for 
> these inserts is stainless steel.  This is quite a lot of steel, and plays an 
> important role in stopping fast muons that are generated in the primary 
> collimator.  I just wanted to check to make sure that these inserts are in 
> the drawings.  They are rectangular and come up to the elliptical beam pipe. 
> The simulation results showed that we do not need to worry about filling the 
> corners around the beam pipe; just leaving a rectangular hole for the 
> elliptical beam pipe is fine.
>
> -Richard Jones
>