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Hi, Paul<br>
<br>
Your EC layout has similar concept as Mehdi had before<br>
<a class="moz-txt-link-freetext" href="http://hallaweb.jlab.org/12GeV/SoLID/download/ec/layout/small%20angle%20Babar_new.pdf">http://hallaweb.jlab.org/12GeV/SoLID/download/ec/layout/small%20angle%20Babar_new.pdf</a><br>
<br>
Related to the LAEC layout<br>
The endcap nose which is surrounded by EC has radius 90cm.<br>
The EC starts at 100cm to cover 7.5 degree polar angle. <br>
8 degree corresponds to 106cm and the <em style="font-weight: bold;
font-style: normal; color: rgb(0, 0, 0); font-family: arial,
sans-serif; font-variant: normal; letter-spacing: normal;
line-height: 11px; orphans: 2; text-align: -webkit-auto;
text-indent: 0px; text-transform: none; white-space: normal;
widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto;
-webkit-text-stroke-width: 0px; background-color: rgb(255, 255,
255); font-size: small; ">Moliere<span
class="Apple-converted-space"> </span></em>radius is 5cm, so
it's enough to have the shower.<br>
If we want to keep the solid green modules, there won't be room for
anything else.<br>
Is there additional supporting structure needs to go between the EC
and endcap nose?<br>
I can made endcap 5cm smaller and hope it doesn't affect field much
if it's the last thing we can do.<br>
<br>
Related to the LAEC layout, see slide 8,9,10<br>
<a class="moz-txt-link-freetext" href="http://hallaweb.jlab.org/12GeV/SoLID/meeting_coll/2012_12/UpdateOnCalorimeter.pdf">http://hallaweb.jlab.org/12GeV/SoLID/meeting_coll/2012_12/UpdateOnCalorimeter.pdf</a><br>
You can see we plan to use one or two layers of smaller module
(5x5cm) to cover the triangle area.<br>
It's doable for large and small square shape modules.<br>
For hexagon module, maybe we can have smaller module with a
half-hexagon shape?<br>
<br>
Thanks<br>
<br>
Zhiwen<br>
<br>
On 3/5/2013 12:33 PM, Paul E. Reimer wrote:<br>
<blockquote cite="mid:51362C52.2080408@anl.gov" type="cite">
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Hello,<br>
<br>
So, Here are my calculations on calorimeter module dimensions:<br>
<br>
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<td style="height:15.0pt;width:132pt" width="132"
height="15"><br>
</td>
<td colspan="3" class="xl64" style="width:111pt" width="111">mm</td>
</tr>
<tr style="height:15.0pt" height="15">
<td style="height:15.0pt" height="15">side length</td>
<td class="xl63" align="right">62.50</td>
<td class="xl63"><br>
</td>
<td class="xl63"><br>
</td>
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<td style="height:15.0pt" height="15">Block half height</td>
<td class="xl63"><br>
</td>
<td class="xl63"><br>
</td>
<td class="xl63" align="right">54.13</td>
</tr>
<tr style="height:15.0pt" height="15">
<td style="height:15.0pt" height="15">Black tape thickness
(3M)</td>
<td class="xl63"><br>
</td>
<td class="xl63" align="right">0.18</td>
<td class="xl63"><br>
</td>
</tr>
<tr style="height:15.0pt" height="15">
<td style="height:15.0pt" height="15">Tape Layers</td>
<td class="xl63"><br>
</td>
<td class="xl63" align="right">3.00</td>
<td class="xl63"><br>
</td>
</tr>
<tr style="height:15.0pt" height="15">
<td style="height:15.0pt" height="15">total tape</td>
<td class="xl63"><br>
</td>
<td class="xl63"><br>
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<td class="xl63" align="right">0.53</td>
</tr>
<tr style="height:15.0pt" height="15">
<td style="height:15.0pt" height="15">Al Foil (Wikipedia)</td>
<td class="xl63"><br>
</td>
<td class="xl63"><br>
</td>
<td class="xl63" align="right">0.02</td>
</tr>
<tr style="height:15.0pt" height="15">
<td style="height:15.0pt" height="15">Wrapping tolerance<br>
</td>
<td class="xl63"><br>
</td>
<td class="xl63"><br>
</td>
<td class="xl63" align="right">0.20</td>
</tr>
<tr style="height:15.0pt" height="15">
<td colspan="2" style="height:15.0pt;mso-ignore:colspan"
height="15">Block fabrication tolerance<br>
</td>
<td class="xl63"><br>
</td>
<td class="xl63" align="right">0.50</td>
</tr>
<tr style="height:15.0pt" height="15">
<td style="height:15.0pt" height="15">Total effect half
height</td>
<td class="xl63"><br>
</td>
<td class="xl63"><br>
</td>
<td class="xl63" align="right">55.38</td>
</tr>
<tr style="height:15.0pt" height="15">
<td style="height:15.0pt" height="15">Effective Side Length</td>
<td class="xl63" align="right">63.95</td>
<td class="xl63"><br>
</td>
<td class="xl63"><br>
</td>
</tr>
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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.<br>
<br>
<img src="cid:part1.06030607.00050109@jlab.org" alt="" width="349"
height="335"><br>
<br>
<br>
Paul<br>
<pre class="moz-signature" cols="72">--
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)
USA <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:reimer@anl.gov">reimer@anl.gov</a></pre>
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