[Solid_ec] Fwd: hex calorimeter module size

[Paul E. Reimer]

-------- Original Message --------
Subject: 	hex module size
Date: 	Wed, 27 Feb 2013 15:38:41 -0600
From: 	Paul E. Reimer <reimer at anl.gov>
Reply-To: 	reimer at anl.gov
Organization: 	Argonne National Laboratory
To: 	Zhiwen Zhao <zwzhao at jlab.org>, Xiaochao Zheng <xiaochao at jlab.org>



Hello,

Several thoughts on the 6.25/side hex modules.  The modules will be 
wrapped in some way to assure light tightness, so should we build the 
base modules as 6.25 cm - 0.075 cm wrapping = 6.125 cm/side modules, or 
should we wrap on the outside of the 6.25 envelope?  In addition to 
this, Vic would like an additional 0.05cm between the modules to allow 
for fabrication tolerance in the modules.  Again, this could be added on 
to the module size in the layout, or subtracted from the module size in 
fabrication.  In other words, in the drawing below, which of the two 
arrows on the left do we wish to have as 6.25*sin 60?  I have a slight 
preference for including the gap and coating within that, or we could 
draw a third arrow in between.




Finally, how big of a gap do we need for the light tight coating?

Paul

-- 
Paul E. Reimer                 +1-630-252-4037 (Argonne Office)
Physics Division Bldg 203      +1-630-252-3903 (Argonne Fax)
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USAreimer at anl.gov



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