[Dsg-rtpc] Fwd: Re: BONuS RTPC gas supply

[Jack Segal]

Just so you know...


-------- Forwarded Message --------
Subject: 	Re: BONuS RTPC gas supply
Date: 	Mon, 6 Apr 2020 16:03:31 -0400
From: 	Denny Insley <dinsley at jlab.org>
To: 	Walt Akers <akers at jlab.org>, Sebastian Kuhn <kuhn at jlab.org>
CC: 	Bob Miller <rmiller at jlab.org>, Jack Segal <segal at jlab.org>, Jessie Butler <jbutler at jlab.org>



Thanks guys! greatly appreciated!

Denny

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
*From:* Walt Akers <akers at jlab.org>
*Sent:* Monday, April 6, 2020 4:02 PM
*To:* Sebastian Kuhn <kuhn at jlab.org>
*Cc:* Denny Insley <dinsley at jlab.org>; Bob Miller <rmiller at jlab.org>; Jack Segal <segal at jlab.org>; Jessie Butler <jbutler at jlab.org>; Walt Akers <akers at jlab.org>
*Subject:* Re: BONuS RTPC gas supply
Jack and I found 6 of them on the Hall B
gas pad.  I've attached a photo.

Walt

Sebastian Kuhn wrote:
> Thanks Walt.
>
> The 4 bottles we are looking for are the ones that were purchased in February - see attached. We would like to know if they arrived and where they are right now.
>
> Thanks - Sebastian
>
>
>> On Apr 6, 2020, at 3:29 PM, Walt Akers <akers at jlab.org <mailto:akers at jlab.org>> wrote:
>>
>> Let me go out and check the pad now.  There may be some there.
>>
>> Walt
>>
>> Denny Insley wrote:
>>> Hi guys,
>>>
>>>     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.
>>>
>>>     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.
>>>
>>>
>>> Regards,
>>> Denny
>>>
>>>
>>> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>>> *From:*Bob Miller<rmiller at jlab.org> <mailto:rmiller at jlab.org>
>>> *Sent:*Monday, April 6, 2020 2:23 PM
>>> *To:*Denny Insley<dinsley at jlab.org> <mailto:dinsley at jlab.org>
>>> *Cc:*Sebastian Kuhn<kuhn at jlab.org> <mailto:kuhn at jlab.org>
>>> *Subject:*Re: BONuS RTPC gas supply
>>> Hi Denny,
>>>
>>> Please send Sebastian an update of how many full HeCO2 bottles we have
>>> at JLab and where they are located.
>>>
>>> Also, see if we have a manifold to connect the bottles together like the
>>> N2 supply rack for RICH or the Hall D gas system, as Sebastian requests
>>> below.
>>>
>>> Thanks
>>>
>>> Bob
>>>
>>>
>>>
>>> On 4/6/2020 2:18 PM, Sebastian Kuhn wrote:
>>> > Dear Bob,
>>> >
>>> > seeing your task list this morning reminded me that I wanted to ask you 2 things:
>>> >
>>> > 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.
>>> >
>>> > 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).
>>> > 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?
>>> >
>>> > Thanks, and wishing you continued good health - Sebastian
>>>
>>> --
>>> Bob Miller
>>> Hall B Lead Engineer
>>> Jefferson Lab
>>> 757 822-9586
>>>
>>>
>>
>>
>