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There was a plan earlier this year to test the FT with pre-mix, so I
produced the attached diagram for testing the FT with pre-mix in the
hall at that time. This setup uses the pre-existing lines that run
from the target gas pad to the downstream end of the space frame.
Replacing the FT chassis in the diagram with the MVT chassis is all
that is required to make it the MVT pre-mix gas supply. This setup
is quite similar to the one in EEL rm 124, but still requires a DA.<br>
<br>
George<br>
<br>
<div class="moz-cite-prefix">On 9/8/2017 12:14 PM, mdefurne wrote:<br>
</div>
<blockquote type="cite"
cite="mid:88027a9d-835d-320f-2346-bcb0bd296852@jlab.org">Hi Marc,
<br>
<br>
Thank you for the update. Before inserting the MVT in the
solenoid, we will have to check that everything has been plugged
back properly. To do so, we will need gas.
<br>
<br>
A back-up plan will be to have the gas line ready and plug a
premix bottle on it. What is the procedure to follow to have this
back up plan ready for the MVT installation in the Hall?
Unfortunately it is necessary to prepare this back-up plan because
we won t insert the CVT in the solenoid without checking that
everything is OK.
<br>
<br>
Kind Regards,
<br>
<br>
Maxime
<br>
<br>
<br>
Le 08/09/2017 à 10:09, Marc McMullen a écrit :
<br>
<blockquote type="cite">Hi Maxime,
<br>
<br>
Currently the MVT mixing system is being evaluated by the
Pressure Systems authority and a location is being discussed by
the fire safety authority. If the location is moved outdoors,
consideration must be given for the mass flow controllers. The
controllers purchased are not specified to operate at a
temperature lower than 50F.
<br>
<br>
DSG is currently looking into another option for an MFC, while
Hall B is looking into locations and climate control
possibilities for the MFCs.
<br>
<br>
With that said, Amrit and I have discussed the possibility for
the mixing system to be completed by 9/15 (possibly not even
10/15) and we think it is not likely. George can provide further
confirmation. If it is necessary to run a premix by then, that
option needs to be expedited.
<br>
<br>
Regards,
<br>
<br>
Marc
<br>
<br>
<br>
<br>
On 9/6/2017 1:41 PM, mdefurne wrote:
<br>
<blockquote type="cite">Dear George,
<br>
<br>
Will the mixing system be ready for October 1st? If not when
do you expect to have it ready?
<br>
<br>
If it is not ready before the 15th, we will absolutely need
the gas line ready so that we can plug a premix bottle to run
tests: We will not be able to enter the CVT in the solenoid if
we do not check the electronics connexion and gas lines.
Indeed, once the CVT inside the solenoid, the micromegas tiles
and disks will not be accessible anymore.
<br>
<br>
If there is any administrative paperwork to have a premix
bottle plugged on the gas line, please let me know.
<br>
<br>
Thank you,
<br>
<br>
Kind regards,
<br>
<br>
Maxime
<br>
<br>
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</blockquote>
<br>
</blockquote>
<br>
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<br>
<pre class="moz-signature" cols="72">--
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606
(office) 757-269-7115
(cell) 757-876-0480
(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a>
(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a></pre>
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