[Dsg-halla_gem] [EXTERNAL] Re: Request for one more flow output on BB gas

[Brian Eng]

Even at 400-500 cc/min the low flow channels will work fine, albeit the readout is capped at 500 (they will flow more though).
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From: Dsg-halla_gem <dsg-halla_gem-bounces at jlab.org> on behalf of Ezekiel Wertz <ewertz at email.wm.edu>
Sent: Monday, October 18, 2021 2:06 PM
To: Anuruddha Rathnayake <adr4zs at virginia.edu>
Cc: dsg-halla_gem at jlab.org <dsg-halla_gem at jlab.org>
Subject: Re: [Dsg-halla_gem] [EXTERNAL] Re: Request for one more flow output on BB gas

So the 400-500 cc/min is for an entire GEM layer. But if you just wanted to do a single INFN GEM module the flow rate in that will be something like maybe 100-200 cc/min per module. So a low flow channel should be fine.

Zeke

On Mon, Oct 18, 2021 at 2:04 PM Anuruddha Rathnayake <adr4zs at virginia.edu<mailto:adr4zs at virginia.edu>> wrote:
Hi Holly,

I think you need a low flow channel.
That's what we use for the back tracker modules (4 low flow channels).

Best,
Anu


On Mon, 18 Oct 2021, 13:59 Marc Mcmullen, <mcmullen at jlab.org<mailto:mcmullen at jlab.org>> wrote:
So this is either an INFN or a new UVA large volume GEM. We will discuss the matter and update you with a plan.

Regards,
Marc
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From: Holly Szumila-Vance <hszumila at jlab.org<mailto:hszumila at jlab.org>>
Sent: Monday, October 18, 2021 1:54 PM
To: Marc Mcmullen <mcmullen at jlab.org<mailto:mcmullen at jlab.org>>; dsg-halla_gem at jlab.org<mailto:dsg-halla_gem at jlab.org> <dsg-halla_gem at jlab.org<mailto:dsg-halla_gem at jlab.org>>
Subject: Re: Request for one more flow output on BB gas


We need about 400-500 sccm. I think this is the hi flow?



From: Marc Mcmullen <mcmullen at jlab.org<mailto:mcmullen at jlab.org>>
Date: Monday, October 18, 2021 at 1:51 PM
To: Holly Szumila-Vance <hszumila at jlab.org<mailto:hszumila at jlab.org>>, "dsg-halla_gem at jlab.org<mailto:dsg-halla_gem at jlab.org>" <dsg-halla_gem at jlab.org<mailto:dsg-halla_gem at jlab.org>>
Subject: Re: Request for one more flow output on BB gas



Hi Holly,



Which type of GEM channels is needed (High or Standard), I'll discuss this with the DSG manager and our gas system expert so we can determine what is needed to expand the 8 channels system.



Regards,

Marc

________________________________

From: Dsg-halla_gem <dsg-halla_gem-bounces at jlab.org<mailto:dsg-halla_gem-bounces at jlab.org>> on behalf of Holly Szumila-Vance <hszumila at jlab.org<mailto:hszumila at jlab.org>>
Sent: Monday, October 18, 2021 12:48 PM
To: dsg-halla_gem at jlab.org<mailto:dsg-halla_gem at jlab.org> <dsg-halla_gem at jlab.org<mailto:dsg-halla_gem at jlab.org>>
Subject: [Dsg-halla_gem] Request for one more flow output on BB gas



Hi,



I’d like to request one more flow output channel on the BB gas side so that we could potentially hook up one GEM to its own gas line. Please let me know how and when this work could be done.



Thanks,

Holly

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