[Tpe] Shielding Option

[David Kashy]

Hi All,
I was talking with Alex Vlassov about CLAS12 shielding. He said that he 
found that putting a layer of Aluminum inside a lead shield made the 
shielding better as low energy stuff died in the aluminum...
What about putting a 2.875" outside diameter x .276" wall aluminum tube 
inside the 5" OD x 1" wall stainless tube?

That would give a 5.9cm ID. Both pieces would be 12 ft long. I think we 
could nearly butt this up against the tungsten 2cm (1.8 or 2.2) 
collimator and reduce the amount of stacked shielding. It could go 
through the Rad phi wall...

Comments?

Thanks
Dave