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<div>DSG did order the gas while the detector was still being constructed, but once it went to the Hall it went under the purview of Hall B.<br>
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Just to be a little more complete, here's what George has previously ordered for RTPC.</div>
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<td height="21" width="87" style="height: 16pt; width: 65pt"><span style="margin: 0px; font-size: 12px">PR</span></td>
<td width="87" style="width: 65pt"><span style="margin: 0px; font-size: 12px">Qty</span></td>
<td width="87" style="width: 65pt"><span style="margin: 0px; font-size: 12px">Submitted</span></td>
<td width="87" style="width: 65pt"><span style="margin: 0px; font-size: 12px">Ordered</span></td>
<td width="87" style="width: 65pt"><span style="margin: 0px; font-size: 12px">Arrived</span></td>
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<td height="21" style="height: 16pt"><span style="margin: 0px; font-size: 12px">383258</span></td>
<td><span style="margin: 0px; font-size: 12px">4</span></td>
<td><span style="margin: 0px; font-size: 12px">2/28/19</span></td>
<td><span style="margin: 0px; font-size: 12px">3/6/19</span></td>
<td><span style="margin: 0px; font-size: 12px">3/22/19</span></td>
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<td height="21" style="height: 16pt"><span style="margin: 0px; font-size: 12px">386752</span></td>
<td><span style="margin: 0px; font-size: 12px">4</span></td>
<td><span style="margin: 0px; font-size: 12px">7/23/19</span></td>
<td><span style="margin: 0px; font-size: 12px">7/24/19</span></td>
<td><span style="margin: 0px; font-size: 12px">9/16/19</span></td>
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<td><span style="margin: 0px; font-size: 12px">10/24/19</span></td>
<td><span style="margin: 0px; font-size: 12px">11/5/19</span></td>
<td><span style="margin: 0px; font-size: 12px">12/6/19</span></td>
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<td height="21" style="height: 16pt"><span style="margin: 0px; font-size: 12px">392248</span></td>
<td><span style="margin: 0px; font-size: 12px">4</span></td>
<td><span style="margin: 0px; font-size: 12px">2/10/20</span></td>
<td><span style="margin: 0px; font-size: 12px">2/19/20</span></td>
<td><span style="margin: 0px; font-size: 12px">3/25/20 </span></td>
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<div style="margin: 0px">While the vendor estimates 4-6 weeks, it's more like 3-8. That last shipment was delivered to 96B.</div>
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<div style="margin: 0px">As for what the quantity remaining of those ordered Jiwan or the RTPC guys that were on site should have a better record of that.</div>
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<div>________________________________________<br>
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<div>From: Dsg-rtpc <dsg-rtpc-bounces@jlab.org> on behalf of Carlos Ayerbe Gayoso <gayoso@jlab.org><br>
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<div>Sent: Monday, April 6, 2020 3:57 PM<br>
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<div>To: Sebastian Kuhn; Jiwan Poudel<br>
</div>
<div>Cc: Jack Segal; Jessie Butler; dsg-rtpc@jlab.org; Bob Miller; Denny Insley; Walt Akers<br>
</div>
<div>Subject: Re: [Dsg-rtpc] BONuS RTPC gas supply<br>
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<div><br>
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<div>Hi Sebastian,<br>
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<div><br>
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<div>I remember there was an email indicating where are the bottles (or somebody mention it), but I was unable to find such email (maybe I imagine that). However, I don't remember seeing any extra pre-mix bottles, besides the two we were using during the last
beam days.<br>
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<div><br>
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<div>I'm CC to the DSG guys, since IF I AM NOT WRONG they were on charge of the acquisition of them (please George ignore this email if my assumption is incorrect).<br>
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<div><br>
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<div>Sorry for not being more useful.<br>
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<div><br>
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<div>Cheers<br>
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<div><br>
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<div>-Carlos<br>
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<div>________________________________<br>
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<div>From: Sebastian Kuhn <kuhn@jlab.org><br>
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<div>Sent: Monday, April 6, 2020 3:30 PM<br>
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<div>To: Carlos Ayerbe Gayoso <gayoso@jlab.org>; Jiwan Poudel <jpoudel@jlab.org><br>
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<div>Subject: Fwd: BONuS RTPC gas supply<br>
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<div><br>
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<div>Hi Jiwan and Carlos,<br>
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<div><br>
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<div>can you check your recollection (emails) to let Walt, Jack and Jessie know which bottles you found, and which ones we are still looking for?<br>
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<div>Thanks - Sebastian<br>
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<div><br>
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<div>Begin forwarded message:<br>
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<div><br>
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<div>From: Denny Insley <dinsley@jlab.org<mailto:dinsley@jlab.org>><br>
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<div>Subject: Re: BONuS RTPC gas supply<br>
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<div>Date: April 6, 2020 at 2:49:52 PM EDT<br>
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<div>To: Bob Miller <rmiller@jlab.org<mailto:rmiller@jlab.org>><br>
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<div>Cc: Sebastian Kuhn <kuhn@jlab.org<mailto:kuhn@jlab.org>>, Walt Akers <akers@jlab.org<mailto:akers@jlab.org>>, Jack Segal <segal@jlab.org<mailto:segal@jlab.org>>, Jessie Butler <jbutler@jlab.org<mailto:jbutler@jlab.org>><br>
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<div><br>
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<div>Hi guys,<br>
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<div><br>
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<div> Of course you know that the current gas panel on the flammable pad does equalize across the two bottles in the system if both supply valves are open. We could move a rack to the pad with the remaining K bottles and plumb them together through a manifold,
if we have one, we can plumb them with tubing if we don't. We moved all of the gas on site to the gas pad outside the gas shed before the shut down. If there was more on order I was unaware of it. If it has been delivered to Hall B it will be on that same
gas pad, this depends on who ordered the gas.<br>
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<div><br>
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<div> I will Cc: Walt, Jessie and Jack on this email if you wish to ask them to check for new bottles. Other than the Hall B gas pad the cage outside of the EEL building, outside of the target group roll up door, is the only other place we have seen it
delivered to up til now.<br>
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<div><br>
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<div><br>
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<div>Regards,<br>
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<div>Denny<br>
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<div><br>
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<div><br>
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<div>________________________________<br>
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<div>From: Bob Miller <rmiller@jlab.org<mailto:rmiller@jlab.org>><br>
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<div>Sent: Monday, April 6, 2020 2:23 PM<br>
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<div>To: Denny Insley <dinsley@jlab.org<mailto:dinsley@jlab.org>><br>
</div>
<div>Cc: Sebastian Kuhn <kuhn@jlab.org<mailto:kuhn@jlab.org>><br>
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<div>Subject: Re: BONuS RTPC gas supply<br>
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<div><br>
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<div>Hi Denny,<br>
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<div><br>
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<div>Please send Sebastian an update of how many full HeCO2 bottles we have<br>
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<div>at JLab and where they are located.<br>
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<div><br>
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<div>Also, see if we have a manifold to connect the bottles together like the<br>
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<div>N2 supply rack for RICH or the Hall D gas system, as Sebastian requests<br>
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<div>below.<br>
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<div><br>
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<div>Thanks<br>
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<div><br>
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<div>Bob<br>
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<div><br>
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<div><br>
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<div>On 4/6/2020 2:18 PM, Sebastian Kuhn wrote:<br>
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<div>> Dear Bob,<br>
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<div>><br>
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<div>> seeing your task list this morning reminded me that I wanted to ask you 2 things:<br>
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<div>><br>
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<div>> 1) Do we know where the 4 bottles of HeCO2 are that got ordered this February? I THINK we should have a total of 6 bottles left, not counting the 2 on the gas pad right now that we use to maintain a minimal flow through the RTPC. IF that is not the case,
we need to scramble to order more bottles, as the lead times were already rather large in the past and may be even worse now.<br>
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<div>><br>
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<div>> 2) Would it be possible to design a simple “equalizer” rig that would allow us to hook up all remaining He/CO2 bottles together and open them all up so that the exact ratio CO2/He can equalize across all bottles? We found a significant variation of the
RTPC performance from one bottle to the next, consistent with the fact that some bottles were quoted as 19.8% CO2 and others as 21%. The exact number is not as important as keeping it a constant throughout the rest of the run (whenever that might occur).<br>
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<div>> Obviously, this would have to be made out of high-pressure tubing that can be connected directly to the bottles (without pressure reducers in between) - perhaps rigid steel tubing?<br>
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<div>><br>
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<div>> Thanks, and wishing you continued good health - Sebastian<br>
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<div><br>
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<div>--<br>
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<div>Bob Miller<br>
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<div>Hall B Lead Engineer<br>
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<div>Jefferson Lab<br>
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<div>757 822-9586<br>
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