Re: pair space

[Richard Jones <richard.t.jones@uconn.edu>]

Jim Stewart wrote:
> Hello Tim
> This starts to get a bit uncomfortable. If we go with the 24-8-72 then 
> the magnet is 7'-6"= 2.3m long including the field clamp. Hrachya  
> plans to use a 1.5m long vacuum chamber followed immediately with the 
> counter array. This means 4.5m are blocked not counting space for 
> working. Here I am assuming the radiator is about 1m upstream so that 
> Franz could install silicon  in front of the magnet. Could we talk 
> about this at the next tagger meeting? I think we are missing a couple 
> meters.
>
> Jim
>
One way to estimate space occupation in the collimator cave is to add up 
the lengths of the essential items.
primary collimator: 50 cm
first sweep: 100 cm ??
first iron block: 200 cm -- could be incorporated into a longer first 
sweep magnet with filled gap
first concrete block: 100 cm
second collimator: 50 cm
second sweep: 100 cm ??
second iron block: 100 cm
second concrete block: 100 cm
lead wall: 15 cm
total (irreducible) length: 815 cm
total length of cave: 1200 cm
We probably have something like 3 m max that we can squeeze out of the cave.

Richard Jones