[Halld-cal] A brief update (fwd from George)

[Elton Smith]

---------- Forwarded message ----------
Date: Tue, 18 Aug 2009 14:44:07 -0600
From: George Lolos <gjlolos at uregina.ca>
To: Elton Smith <elton at jlab.org>
Cc: Tim Whitlatch <whitey at jlab.org>, Eugene Chudakov <gen at jlab.org>,
     Dan Kolybaba <Dan.Kolybaba at uregina.ca>, halld-cal at jlab.org,
     Zisis Papandreou <zisis at uregina.ca>
Subject: Re: A brief update

Hi Elton:

I just came back from the BCAL-construction lab.  The students have
already done five layers of lead and SciFi's.   The Cu sheet on the
fiber sorting table has really helped a lot.  The fibers do not
attract dust anymore and they don't fan out at their ends due to
static build-up.   For anyone who doubted that there's much of static
electricity build-up, one of our students touched the grounding wire
and got zapped!   :-)

As a side effect, the smooth and "slippery" nature of the pure Cu
surface makes it easier to bundle the fibers to their exact numbers to
be used on the grooved lead layer.

So far so good.  Danny is ordering the parts for the second press
frame so we're moving along and we'll try to make up some lost time
before this crew of students finish their work terms at the end of
August.

Cheers,

George


On 18-Aug-09, at 2:06 PM, Elton Smith wrote:

>
> Sounds Great! I have passed this info onto Allison for use in the 12
> GeV
> weekly brief.
>
> Cheers, Elton.
>
> On Tue, 18 Aug 2009, George Lolos wrote:
>
>> Hi guys:
>>
>> Just a very brief update on the 1st Article BCAL module and the
>> overall preparations.   A more detailed update will follow later with
>> some photos.
>>
>> The base lead layer has been glued to the Al base plate with no
>> problems.  It's nicely centered on the plate with no epoxy migration
>> other than a tiny amount at one of the two ends, they will be trimmed
>> anyway.
>>
>> The Cu sheet has been glued on the fiber sorting table and grounded,
>> the sorting of the SciFi's for the first few layers has started and
>> we're just about ready to start building the matrix.  All the lead
>> sheets have been swaged.  So far no major problems and all of us are
>> learning lessons of how to improve upon our older techniques.
>>
>> Cheers,
>>
>> George
>>
>>
>>
>