[Dsg-halla_gas] Hall A GEM Detector gas outlet Flow Sensor

[Brian Eng]

If there isn't room for a chassis then individual boxes are what we'd go with, but it isn't clear yet if there is space available or not along with conflicting information about how much tubing is to be between the detector exhaust and sensor.

I suspect if individual boxes we'd just get cheap plastic ones with a design very similar to what you suggested.

________________________________
From: Dsg-halla_gas <dsg-halla_gas-bounces at jlab.org> on behalf of Marc Mcmullen <mcmullen at jlab.org>
Sent: Wednesday, July 29, 2020 11:32 AM
To: George Jacobs <jacobsg at jlab.org>; dsg-halla_gas at jlab.org <dsg-halla_gas at jlab.org>
Subject: Re: [Dsg-halla_gas] Hall A GEM Detector gas outlet Flow Sensor

Hi George,

Thanks for the drawings. We can look at mounting locations for the exhaust flow sensors when Jack sends us some documentation.

Marc
________________________________
From: George Jacobs <jacobsg at jlab.org>
Sent: Wednesday, July 29, 2020 11:24 AM
To: Marc Mcmullen <mcmullen at jlab.org>; dsg-halla_gas at jlab.org <dsg-halla_gas at jlab.org>
Subject: Hall A GEM Detector gas outlet Flow Sensor

Please see attached diagram. This is what Jack was referring to for the gas out sensor.  I happen to agree with his argument and that this type of setup is what is actually  needed.

The sensor is enclosed in a box. It could be a very basic aluminum enclosure. This has a hole for plugging in the phone connection on the side and the 2 push lok wall fittings. This would be placed as close to the detector gas outlet as resonable to minimize back pressure.

The GEM windows are large, gas back pressure will stress the window at the corners the most. This may lead to increasing detector leak rates and other serious problems over time.


--
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606
(office) 757-269-7021
(email) jacobsg at jlab.org
(url) https://userweb.jlab.org/~jacobsg


________________________________
From: Dsg-halla_gas <dsg-halla_gas-bounces at jlab.org> on behalf of Marc Mcmullen <mcmullen at jlab.org>
Sent: Tuesday, July 28, 2020 12:59 PM
To: dsg-halla_gas at jlab.org <dsg-halla_gas at jlab.org>
Subject: [Dsg-halla_gas] meeting minutes from 07/28

Here are the minutes from today's GEM Gas Distribution Meeting

Marc
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-halla_gas/attachments/20200729/67b9fc04/attachment.html>