[Dsg-halla_gas] Fw: SBS/BB GEM gas distribution

[Marc Mcmullen]

Hi Kondo,

Thanks for reviewing the documents. The flow rates for the Dwyer RMA - 12 and 13 (flow meters listed on the parts list) are given in flow per minute. For example, George has FMV1 to FMV4 at 500 cubic centimeters, this would be 500 cc per minute.

Marc

________________________________
From: Gnanvo, Kondo (kg6cq) <kg6cq at virginia.edu>
Sent: Wednesday, December 18, 2019 7:05 AM
To: Kondo Gnanvo <kagnanvo at jlab.org>; Marc Mcmullen <mcmullen at jlab.org>
Cc: Evaristo Cisbani <evaristo.cisbani at roma1.infn.it>; Liyanage, Nilanga -- Nilanga Liyanage <nilanga at jlab.org>; Liyanage, Nilanga K (nl8n) <nl8n at virginia.edu>
Subject: [EXTERNAL] Re: [Dsg-halla_gas] SBS/BB GEM gas distribution

Hi Marc,
Thanks for the work done. I think it is pretty consistent with the discussions at the few meetings we had before. I just verify (see attached) that the scheme would satisfy the most demanding GEM layers of the SBS experiments. Which is good.

I just have one technical question about the flow-meters and transducers specifications. When you have numbers like 500 cc, 750 cc and 1000 cc, what does it mean exactly about the maximum capabilities of these devices?
I am asking that because 1000 cc = 1 L basically and for example one of the UVa GEM module (not layer) has a capacity of 5 L and will run at a minimum of a volume change per hour which means 5000 cc / hour so if the FM and FT are specified to 500 cc, what does that mean? Similar concern for the INFN layers.

Can we run safely at these flow rates with these devices. It is just a naive question from me to understand the numbers because I am ignorant of big gas system like this, I am not challenging the choices

Thank for the clarifications
Best regards
Kondo
________________________________
From: kagnanvo <kagnanvo at jlab.org>
Sent: Tuesday, December 17, 2019 6:40 AM
To: Marc Mcmullen <mcmullen at jlab.org>; Gnanvo, Kondo (kg6cq) <kg6cq at virginia.edu>
Subject: Re: [Dsg-halla_gas] SBS/BB GEM gas distribution


Dear Marc,

May I ask you to please send the document to me through my UVa email address "Kondo Gnanvo <kg6cq at virginia.edu><mailto:kg6cq at virginia.edu>".

For some reason jlab seems to block any attached document that is destined to me

Thanks

Best regards

Kondo



On 12/16/2019 11:53 AM, Marc Mcmullen wrote:
Hi Nilanga, Kondo, and Everisto,

George has completed the preliminary P&I for the distribution panel and a components list (see attachments). If everyone can take some time to review the documents and provide comment, we can move forward with mechanical drawings and procurement. If all interested parties can send comments to this email list, I will compile them and we can meet in January to have a discussion.

Before we start procurement, Jack, Brad, and the design authority will need to approve of the design/components.

If there has been any significant progress on the development of the detectors, please send an update to this email list, so that we may stay abreast of the advancements.

Regards,
Marc







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