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Hi Richard,<br>
<br>
This seems to be a question for controls . The original plan was to
have just fibers going to the counting house, no coax cables (maybe
just a few now).<br>
<br>
Best regards,<br>
Fernando<br>
<br>
<br>
On 11/6/2012 11:51 AM, Richard Jones wrote:
<blockquote cite="mid:50994016.9000408@uconn.edu" type="cite">
<div class="moz-cite-prefix">Hi Fernando,<br>
<br>
The cabling plans that I have seen have focused on detector
subsystems. I don't think we have established plans yet for
beamline related sensors that are not a part of the data
acquisition. Examples of this would be coax cables for video
cameras looking at the radiator target, and background rate
monitor scintillators that we will want placed at various
locations along the beamline. How many of these and where they
will be placed is not fixed yet, but it will be very useful to
have patch panels with connections to the counting house so we
can look at various things when beam is in the hall. The same
thing goes for the collimator cave. Especially during
commissioning it will be useful to have measurements of
background in the cave, and know how things are changing with
beam tune, etc.<br>
<br>
When I was thinking about these things, it struck me that it
would be useful to also be able to view the currents from the
active collimator directly in the counting house, and do the
signal digitization there. This way we do not have to put a
data acquisition crate in the high-radiation area of the
collimator cave and risk it rebooting, etc. Especially during
commissioning this would seem to be useful.<br>
<br>
-Richard J.<br>
<br>
On 11/6/2012 10:14 AM, Fernando J Barbosa wrote:<br>
</div>
<blockquote cite="mid:50992969.7060002@jlab.org" type="cite"> Hi
Richard,<br>
<br>
I have been talking about cables and such for years and you
never requested these. Are these anywhere on the plans? Any
details?<br>
<br>
Best regards,<br>
Fernando<br>
<br>
On 11/6/2012 9:08 AM, Richard Jones wrote:
<blockquote cite="mid:509919F0.8050903@uconn.edu" type="cite">
Hi Fernando,<br>
<br>
I don't know where this request should be routed, so I am
sending it directly to you. I would like to make sure that we
have coaxial connections from the upstream wall of the
collimator cave to the counting house. Here are some signals
that we would like to be able to read directly, and minimize
how much DAq electronics we need to place in a hot radiation
area.<br>
<ol>
<li>output signals from the active collimator: 8</li>
<li>cave background rate monitor scintillators: 2-4</li>
</ol>
<p>A panel of 16 or 24 would be sufficient, I believe. There
are also controls for the collimator translation stage and
associated limit switches. Further downstream there is the
converter target ladder, which may be inside the cave or
outside, depending on the ability to shield the stray
magnetic field from the pair spectrometer. I just want to
make sure we have cables and cable trays for these
interconnects, as it may be difficult to add them later.<br>
</p>
<p>-Richard Jones<br>
</p>
</blockquote>
<br>
</blockquote>
<br>
</blockquote>
<br>
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