[Solid_ec] Calorimeter dimensions

[Zhiwen Zhao]

Hi, Paul

Your EC layout has similar concept as Mehdi had before
http://hallaweb.jlab.org/12GeV/SoLID/download/ec/layout/small%20angle%20Babar_new.pdf

Related to the LAEC layout
The endcap nose which is surrounded by EC has radius 90cm.
The EC starts at 100cm to cover 7.5 degree polar angle.
8 degree corresponds to 106cm and the /Moliere/radius is 5cm, so it's 
enough to have the shower.
If we want to keep the solid green modules, there won't be room for 
anything else.
Is there additional supporting structure needs to go between the EC and 
endcap nose?
I can made endcap 5cm smaller and hope it doesn't affect field much if 
it's the last thing we can do.

Related to the LAEC layout, see slide 8,9,10
http://hallaweb.jlab.org/12GeV/SoLID/meeting_coll/2012_12/UpdateOnCalorimeter.pdf
You can see we plan to use one or two layers of smaller module (5x5cm) 
to cover the triangle area.
It's doable for large and small square shape modules.
For hexagon module, maybe we can have smaller module with a half-hexagon 
shape?

Thanks

Zhiwen

On 3/5/2013 12:33 PM, Paul E. Reimer wrote:
> Hello,
>
> So, Here are my calculations on calorimeter module dimensions:
>
>
> 	mm
> side length 	62.50 	
> 	
> Block half height 	
> 	
> 	54.13
> Black tape thickness (3M) 	
> 	0.18 	
> Tape Layers 	
> 	3.00 	
> total tape 	
> 	
> 	0.53
> Al Foil (Wikipedia) 	
> 	
> 	0.02
> Wrapping tolerance
> 	
> 	
> 	0.20
> Block fabrication tolerance
> 	
> 	0.50
> Total effect half height 	
> 	
> 	55.38
> Effective Side Length 	63.95 	
> 	
>
>
> The following is a possible layout, with a boundary example.  The 
> green outlined modules do not exist.  The red and black modules are 
> modules that are completely outside the r=100 cm boundary. The solid 
> hexagons contain r=100, with solid red indicating that the center of 
> the module is greater than 100 and green indicating the center of the 
> module is less than 100.  The three arcs are at 90 cm, 100 cm and 110 
> cm.  The proposal is to include all solid modules.
>
>
>
>
> Paul
> -- 
> Paul E. Reimer                 +1-630-252-4037 (Argonne Office)
> Physics Division Bldg 203      +1-630-252-3903 (Argonne Fax)
> 9700 S. Cass Ave.              +1-630-840-5709 (Fermilab)
> Argonne, IL  60439             +1-630-344-9207 (Cell)
> USAreimer at anl.gov
>
>
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