<html><head>
</head><body text="#000000" bgcolor="#FFFFFF">Great news! Another
milestone reached and a few more coming this month...<br>
<br>
Cheers, Zisis...<br>
<br>
<blockquote type="cite" cite="mid:4F5D1576.4050000@jlab.org">
<div class="__pbConvHr"><div> <div><img width="25px" height="25px" src="cid:part1.01000305.05030405@uregina.ca"></div> <div>
<a href="mailto:elton@jlab.org">Elton Smith</a></div> <div>
<font color="#9FA2A5">March 11, 2012
3:13 PM</font></div></div></div>
<div class="__pbConvBody" __pbrmquotes="true"><div>Dear collaborators,<br><br>We
completed gluing all light guides onto the mini-Bcal on Friday. Some <br>photos
are available at<br><a href="https://halldweb1.jlab.org/wiki/index.php/BCAL_Beam_Tests_2012#Photos_and_Plots">https://halldweb1.jlab.org/wiki/index.php/BCAL_Beam_Tests_2012#Photos_and_Plots</a><br><br>By-in-large
the process was a success. All guides fit together very well <br>and
the monitoring boards arrived from Athens just in time to attach <br>them
to the center two columns on both sides. The gluing procedure <br>proceeded
one guide at a time, where we hope to develop a production <br>scheme
that allows us to glue one column at a time. We are improving the <br>tooling
to accomplish this goal.<br><br>In the process of mounting the Bcal
monitoring boards one LED broke off, <br>so we have one missing board on
the K guide next to the missing guide <br>where we still have access.
Christina has sent us some spare LEDs to <br>repair the broken board. As
far as we could tell we did not bump or <br>mistreat that LED board, so
we are not sure why the LED broke off.<br><br>One concern is the width
of the light guides relative to the mini-Bcal. <br>We started gluing the
left-most column and, by design, its edge is <br>starts 0.5 mm inside
the module. This ensures that the placement of an <br>adjacent module
(in the full experiment) is not impacted. However, the <br>edge of the
right-most column extends beyond the right side of the <br>module by
about a 0.5 mm. This is not a problem for the present ectype, <br>but we
need to understand why the complement of light guides are not <br>undersized.
We took measurements of each light guide and the mini-Bcal <br>and will
check where the dimensions are slightly off. The design left <br>some
slight gaps for the glue and we do not think these have been exceeded.<br><br>More
discussion on this later.<br><br>Cheers, Elton.<br><br><br></div></div>
</blockquote>
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