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I have some questions and comments concerning how fast you want to
"fill" the RICH,<br>
<br>
Questions first;<br>
<br>
#1 What is the time frame you require for purging the RICH volume
from initial condition of clean room air, ~ 50% humidity, to your
final desired number?<br>
<br>
#2 What is the maximum final H2O concentration for storage and
operation?<br>
<br>
#3 What is the N2 volume of the detector?<br>
<br>
Comments; <br>
<br>
N2 gas purge supply details;<br>
- The N2 purge supply flow is controlled by a mechanical valve
rotometer, 0-20 slm<br>
- Purge flow is monitored by a mass flow transducer, 0-20 slm<br>
- The N2 purge supply valve panel is a pressure system<br>
<br>
N2 purge supply flow specifications<br>
Channel 1 maximum flow - 20 slm (1200 liters per hour/28,800 liters
per day)<br>
Channel 2 maximum flow - 20 slm (1200 liters per hour/28,800 liters
per day)<br>
<br>
The above maximum flow specifications remain constant with regard to
the type or source of the N2 supply.<br>
<br>
Thanks,<br>
George<br>
<br>
<div class="moz-cite-prefix">On 10/9/2017 10:19 AM, Marco Mirazita
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:cd6690bbc2cb8b4af65fa50c9a3f7e3e@webmail.lnf.infn.it"><br>
<br>
- Nitrogen
<br>
1) Setup the N2 distribution lines inside the RICH. <br>
2) The dewar is not suitable to fill the RICH quickly (i.e. in few
hours). A new system must be used, for example bottles. This
should be discussed timely with the DSG. There is the plan to test
the N2 system in the RICH for the week of October 16. This test
will include installation of the exit panel, rotation of the RICH
in vertical position, installation of the frontal panels (possibly
using the assembly frame), sealing of the electronic panel region
with plastic. It makes sense to do all this assembly work only if
we have (or we may have) a way to fill the RICH with N2 in a
reasonable time.
<br>
<br>
<br>
<br>
<br>
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</blockquote>
<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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