[Halld-tagger] List of changes

Alexander Somov somov at jlab.org
Mon Jun 14 17:50:35 EDT 2010


Hello Richard,

Below are a few minor corrections/comments to the list:

8) according to my record, the pole size should be 41 x 622.7 cm^2
(measured from the pole edge). Tim, could you please check.

12) Design of the primary collimator.
We reduced the length of the primary collimator from 30 cm to 20 cm
(based on the bg simulation). The size of the inner tungsten rectangular
block is 8'' x 2.5 '' x 8'' (there are two holes in it). It is wrapped 
by lead (blocks) with the outer dimensions
12''(width) x 8'' (height) x 8'' (length)

15) just to be consistent with the ps proposal, the ps will be
instrumented with 40 counters (rather than 36): 24 (FSF) + 6 (WSF)
+ 6 + 4 counters in the back.

Cheers,
        Sascha


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