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Re: dimensions



Hello,

Pls click the link below to access the pdf file showing the latest dimensions
of the Hall D detector.

http://www.jlab.org/~ravi/hall/hallD/dimensions.pdf

Let me know if there are any questions.

Thanks

Ravi



Elton Smith wrote:

> Detector dimensions
>
> Curtis recently sent around a list of detector dimensions. Ravi reviewed
> some of the differences from that list and his model, most of which are
> due to recent updates. For the record, I briefly summarize the differences
> here.
>
> 1. Iron fills the gap between coils.
> 2. 6" of Fe has been added to the downstream edge of the magnet to improve
> magnetic properties.
> 3. The FDC packages are wider, consistent with prototype dimensions.
>
> Due to #2, there was some discussion about where the barrel calorimeter
> actually ends: should it go all the way to the end of the iron, or (more
> likely) end shortly past the last FDC package. Ed was going to review this
> with George and Zisis. (This discussion lead to the question as to where
> the barrel calorimeter should start as well. Currently the drawings have
> it starting at the upstream edge of the CDC.)
>
> Ravi also questioned the location of the origin, which we thought to be at
> the upstream edge of the magnet iron. However, this point seems to be
> inconsistent with some of the dimensions that Curtis gave. Ravi should
> check this out with Curtis.
>
> Cheers, Elton.
>
> --
> Elton Smith
> Jefferson Lab
> elton@jlab.org
> (757) 269-7625