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- Page 96: the reader might notice that that RPC are described as glass-based when they are an option for DHCAL, while Bakelite plates are suggested as an option for the Muon system. Not a real criticism, but looks somewhat odd.
H.Band: It is not completely arbitrary, but different choices on what aspect of the design was most important.
We could use either material for both detectors.
Glass is significantly heavier than bakelite for the same thickness (2mm) and more brittle.
Given the large area chambers needed for the muon system Bakelite would be easier to construct and install.
Probably cheaper too. The downside is the potential aging problems which
as far as I know have been mitigated at LHC.
The glass RPCs have better aging characteristics. When used in a thinner design (1.2 mm) the stiffness
is an advantage. I don't think the Argonne group has fully solved how they would build a glass RPC
calorimeter from roughly 1m by 1m squares (or smaller), but they seem convinced that it can be done.
Here the choice was on the safest technology.
Magnet system (Altogether, a well detailed chapter)
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