<div dir="ltr">Hi Marc,<br><br><div>The answer to your first question is yes, the first 4 flow meters are connected to the UVA GEMs.<br><br></div><div>Best</div><div>Anu</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jan 27, 2021 at 9:49 AM Marc Mcmullen <<a href="mailto:mcmullen@jlab.org">mcmullen@jlab.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Hi Anu, Kondo, and Jack<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
I have a couple of questions on the GEM testing in the TEDF.</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
The gas has been flowing since early yesterday, are the gas lines connected to the UVA GEM? And secondly, do you have an estimate of when the testing will have enough data that we can conclude that DSG should complete the gas system in it's entirety, which
would be an additional 42 gas channels to supply the SBS GEMs</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
This second question can be addressed in detail during the next monthly GEM gas distribution meeting (2/5/21 at 3:45pm). But the scheduling information is necessary for DSG management to schedule the work.</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Regards,</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Marc</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<a href="https://epicsweb.jlab.org/wedm/screen?edl=%2fcs%2fopshome%2fedm%2fdsg%2fGEM_text.edl" title="https://epicsweb.jlab.org/wedm/screen?edl=%2fcs%2fopshome%2fedm%2fdsg%2fGEM_text.edl" target="_blank">GEM WEDM monitoring page</a><br>
</div>
<div id="gmail-m_8798169978554187296appendonsend"></div>
<hr style="display:inline-block;width:98%">
<div id="gmail-m_8798169978554187296divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Anuruddha Rathnayake <<a href="mailto:adr4zs@virginia.edu" target="_blank">adr4zs@virginia.edu</a>><br>
<b>Sent:</b> Tuesday, January 26, 2021 12:29 PM<br>
<b>To:</b> Marc Mcmullen <<a href="mailto:mcmullen@jlab.org" target="_blank">mcmullen@jlab.org</a>><br>
<b>Cc:</b> Liyanage, Nilanga K (nl8n) <<a href="mailto:nl8n@virginia.edu" target="_blank">nl8n@virginia.edu</a>>; <a href="mailto:dsg-halla_gem@jlab.org" target="_blank">dsg-halla_gem@jlab.org</a> <<a href="mailto:dsg-halla_gem@jlab.org" target="_blank">dsg-halla_gem@jlab.org</a>>; Jeffas, Sean (sj9ry) <<a href="mailto:sj9ry@virginia.edu" target="_blank">sj9ry@virginia.edu</a>><br>
<b>Subject:</b> Re: [Dsg-halla_gem] [EXTERNAL] Re: Prototype gas distribution system</font>
<div> </div>
</div>
<div>
<div dir="ltr">Hi Marc,<br>
<br>
<div>That specific low meter is very bumpy. The ball jumps up and down a lot and it's difficult to set it to smaller values. But 67 is fine with us I think.<br>
<br>
</div>
<div>George: Thanks for letting us know. We were actually reading out the values from the center of the ball so far. Maybe it's not clear in the picture. We had it at 250 when we were purging the system.<br>
<br>
</div>
<div>Best</div>
<div>Anu</div>
</div>
<br>
<div>
<div dir="ltr">On Tue, Jan 26, 2021 at 11:49 AM Marc Mcmullen <<a href="mailto:mcmullen@jlab.org" target="_blank">mcmullen@jlab.org</a>> wrote:<br>
</div>
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">
<div>
<p>Is there a reason Ch3 is 67 vs mid 80s for the other three channels?</p>
<p><u></u> <u></u></p>
<p>Sent from <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__go.microsoft.com_fwlink_-3FLinkId-3D550986&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=hQJSuIbzwxGOX7LZbVne0gHeC6U5hlDu99LTH_I02ZM&m=qik83E1Kt2k7zwej8MGF81uyuE0k0xYMQABicEdJj-U&s=Px3gOPRY_Jq2PFCi8Y4Jq6aZ5uNRSTExwlgCoD_d5sQ&e=" target="_blank">
Mail</a> for Windows 10</p>
<p><u></u> <u></u></p>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p style="border:none;padding:0in"><b>From: </b><a href="mailto:adr4zs@virginia.edu" target="_blank">Anuruddha Rathnayake</a><br>
<b>Sent: </b>Tuesday, January 26, 2021 11:13 AM<br>
<b>To: </b><a href="mailto:mcmullen@jlab.org" target="_blank">Marc Mcmullen</a><br>
<b>Cc: </b><a href="mailto:nl8n@virginia.edu" target="_blank">Liyanage, Nilanga K (nl8n)</a>;
<a href="mailto:dsg-halla_gem@jlab.org" target="_blank">dsg-halla_gem@jlab.org</a>;
<a href="mailto:sj9ry@virginia.edu" target="_blank">Jeffas, Sean (sj9ry)</a><br>
<b>Subject: </b>Re: [Dsg-halla_gem] [EXTERNAL] Re: Prototype gas distribution system</p>
</div>
<p><u></u> <u></u></p>
<div>
<p>Hi Marc,<u></u><u></u></p>
<div>
<p><u></u> <u></u></p>
</div>
<div>
<p>I just looked and it works. <u></u><u></u></p>
</div>
<div>
<p>It seems like the readback is reading out a little less (~230) than what is says in thr flo meters (~250).<u></u><u></u></p>
</div>
<div>
<p><u></u> <u></u></p>
</div>
<div>
<p>Best<u></u><u></u></p>
</div>
<div>
<p>Anu<u></u><u></u></p>
</div>
</div>
<p><u></u> <u></u></p>
<div>
<div>
<p>On Tue, 26 Jan 2021, 11:08 Marc Mcmullen, <<a href="mailto:mcmullen@jlab.org" target="_blank">mcmullen@jlab.org</a>> wrote:<u></u><u></u></p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p>It doesn’t matter. Please just leave it.</p>
<p> </p>
<p>Sent from <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__go.microsoft.com_fwlink_-3FLinkId-3D550986&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=hQJSuIbzwxGOX7LZbVne0gHeC6U5hlDu99LTH_I02ZM&m=KZk0W2gpGyKzyzyiAbgaQrF2HlUfb3KR-zZ0tDs9BjE&s=iSH9gpwoQuzZ6-mez4WBRpqn-VhrI72rUDFH0oif1BU&e=" target="_blank">
Mail</a> for Windows 10</p>
<p> </p>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p><b>From: </b><a href="mailto:adr4zs@virginia.edu" target="_blank">Anuruddha Rathnayake</a><br>
<b>Sent: </b>Tuesday, January 26, 2021 11:07 AM<br>
<b>To: </b><a href="mailto:mcmullen@jlab.org" target="_blank">Marc Mcmullen</a><br>
<b>Cc: </b><a href="mailto:nl8n@virginia.edu" target="_blank">Liyanage, Nilanga K (nl8n)</a>;
<a href="mailto:dsg-halla_gem@jlab.org" target="_blank">dsg-halla_gem@jlab.org</a>;
<a href="mailto:sj9ry@virginia.edu" target="_blank">Jeffas, Sean (sj9ry)</a><br>
<b>Subject: </b>Re: [Dsg-halla_gem] [EXTERNAL] Re: Prototype gas distribution system</p>
</div>
<p> </p>
<div>
<p>Hi Marc,</p>
<div>
<p> </p>
</div>
<div>
<p>Also, chuck pulled the network cable out when qe tried to re-orient the setup a little bit but didn't realize to which port (input/putput) the cable was plugged in. </p>
</div>
<div>
<p> </p>
</div>
<div>
<p>Could you tell us it whether it's the input or the output?</p>
</div>
<div>
<p>Right now it's plugged into the output.</p>
</div>
<div>
<p> </p>
</div>
<div>
<p>Best</p>
</div>
<div>
<p>Anu</p>
</div>
</div>
<p> </p>
<div>
<div>
<p>On Tue, 26 Jan 2021, 10:57 Anuruddha Rathnayake, <<a href="mailto:adr4zs@virginia.edu" target="_blank">adr4zs@virginia.edu</a>> wrote:</p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<div>
<p>Hi Marc,</p>
<div>
<p> </p>
</div>
<div>
<p>Chuck and I started flowing N2 gas through the lines labeled as 1,2,3, and 4.</p>
</div>
<div>
<p>We are purging the system with each flow meter set to 250 cc/min.</p>
</div>
<div>
<p> </p>
</div>
<div>
<p>I'll be here until noon if you want to test the system or I can be back aroun 2:30 pm to test the readback.</p>
</div>
<div>
<p> </p>
</div>
<div>
<p>Best</p>
</div>
<div>
<p>Anu</p>
</div>
</div>
<p> </p>
<div>
<div>
<p>On Mon, 25 Jan 2021, 13:20 Marc Mcmullen, <<a href="mailto:mcmullen@jlab.org" target="_blank">mcmullen@jlab.org</a>> wrote:</p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<div>
<div>
<p><span style="font-size:12pt;color:black">Thanks Anu,</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">After everything is connected and gas is flowing please send an email to the
<a href="mailto:dsg-halla_gem@jlab.org" target="_blank">dsg-halla_gem@jlab.org</a> mailing list. Once we can verify that everything is flowing, I would like to test readback, by changing the flow meter settings in steps. I'll send you some step values when
you are available to run some tests.</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Regards,</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Marc</span></p>
</div>
<p><img border="0" width="451" height="2" id="gmail-m_8798169978554187296x_gmail-m_-5026406764265237465_x0000_i1026" style="width: 4.7013in; height: 0.0208in;"></p>
<div id="gmail-m_8798169978554187296x_gmail-m_-5026406764265237465m_709754754891792451m_6371962302132828042m_6771643800042008120divRplyFwdMsg">
<p><b><span style="color:black">From:</span></b><span style="color:black"> Anuruddha Rathnayake <<a href="mailto:adr4zs@virginia.edu" target="_blank">adr4zs@virginia.edu</a>><br>
<b>Sent:</b> Monday, January 25, 2021 1:12 PM<br>
<b>To:</b> Liyanage, Nilanga K (nl8n) <<a href="mailto:nl8n@virginia.edu" target="_blank">nl8n@virginia.edu</a>><br>
<b>Cc:</b> Marc Mcmullen <<a href="mailto:mcmullen@jlab.org" target="_blank">mcmullen@jlab.org</a>>;
<a href="mailto:dsg-halla_gem@jlab.org" target="_blank">dsg-halla_gem@jlab.org</a> <<a href="mailto:dsg-halla_gem@jlab.org" target="_blank">dsg-halla_gem@jlab.org</a>>; Jeffas, Sean (sj9ry) <<a href="mailto:sj9ry@virginia.edu" target="_blank">sj9ry@virginia.edu</a>><br>
<b>Subject:</b> Re: [Dsg-halla_gem] [EXTERNAL] Re: Prototype gas distribution system</span>
</p>
<div>
<p> </p>
</div>
</div>
<div>
<div>
<p style="margin-bottom:12pt">Hi Marc and Nilanga,</p>
<div>
<p style="margin-bottom:12pt">Thank you very much. I'll get it connected asap.</p>
</div>
<div>
<p>Best</p>
</div>
<div>
<p>Anu</p>
</div>
<div>
<p> </p>
</div>
</div>
<p> </p>
<div>
<div>
<p>On Mon, Jan 25, 2021 at 12:56 PM Liyanage, Nilanga K (nl8n) <<a href="mailto:nl8n@virginia.edu" target="_blank">nl8n@virginia.edu</a>> wrote:</p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt">
<div>
<div>
<p><span style="font-size:12pt;color:black">Hi Marc</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Thanks for taking care of the issues in the gas system.</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Anu: I suggest that you (with help from Chuck as needed) reconnect the GEM layer to the prototype panel.</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Best</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Nilanga</span></p>
</div>
<p><img border="0" width="445" height="2" id="gmail-m_8798169978554187296x_gmail-m_-5026406764265237465_x0000_i1025" style="width: 4.6319in; height: 0.0208in;"></p>
<div id="gmail-m_8798169978554187296x_gmail-m_-5026406764265237465m_709754754891792451m_6371962302132828042m_6771643800042008120x_gmail-m_-7627413467048292599divRplyFwdMsg">
<p><b><span style="color:black">From:</span></b><span style="color:black"> Dsg-halla_gem <<a href="mailto:dsg-halla_gem-bounces@jlab.org" target="_blank">dsg-halla_gem-bounces@jlab.org</a>> on behalf of Marc Mcmullen <<a href="mailto:mcmullen@jlab.org" target="_blank">mcmullen@jlab.org</a>><br>
<b>Sent:</b> Monday, January 25, 2021 12:31 PM<br>
<b>To:</b> <a href="mailto:dsg-halla_gem@jlab.org" target="_blank">dsg-halla_gem@jlab.org</a> <<a href="mailto:dsg-halla_gem@jlab.org" target="_blank">dsg-halla_gem@jlab.org</a>><br>
<b>Subject:</b> [Dsg-halla_gem] Prototype gas distribution system</span> </p>
<div>
<p> </p>
</div>
</div>
<div>
<div>
<p><span style="font-size:12pt;color:black">Hi Chuck, Anu, and Jack</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">George has returned the regulator panel to the TEDF and connected the four channels not currently in use. He has replaced the faulty regulator, and all the gas lines are now polyethylene. Would
it be possible to connect the system back up as designed. This would require:</span></p>
</div>
<ul type="disc">
<li>The four channels supplying the UVA GEM should be disconnected from the output of the four 500 sccm flow meters and connected to the standard flow channels of the gas flow sensor chassis, on the back of the rack (chassis front), these
channels are labeled "Std Flow" (1 to 4) <u></u><u></u></li></ul>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<ul type="disc">
<li style="color:black"><span style="font-size:12pt">Four 1/4" gas lines should be connected from the manifold on the DSG designed regulator panel to connect to the input of the four 500 sccm flow meter, and the supply line from the gas
bottle should be connected to the input fitting on the regulator panel. </span><u></u><u></u></li></ul>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<ul type="disc">
<li style="color:black"><span style="font-size:12pt">The output of the 500 sccm flow meters should be connected to the corresponding inputs on the back of the Gas Flow Sensor chassis input (back of the chassis), these are labeled "Std Flow"
(1 to 4)</span><u></u><u></u></li></ul>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Once connected and flow has been reestablished, remote monitoring can be done by using this link:</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"><a href="https://epicsweb.jlab.org/wedm/screen?edl=%2fcs%2fopshome%2fedm%2fdsg%2fGEM_text.edl" title="https://epicsweb.jlab.org/wedm/screen?edl=%2fcs%2fopshome%2fedm%2fdsg%2fGEM_text.edl" target="_blank">Prototype
GEM WEDM page</a></span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Using this link only requires your jlab username and cue password, it can even be viewed from a smartphone. Please let me know when you are able reconnect the system, I will ensure the monitoring
software is on. Currently, it is running.</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Regards,</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black">Marc</span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
<div>
<p><span style="font-size:12pt;color:black"> </span></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</blockquote>
</div>
<p style="margin-left:0.2in">_______________________________________________<br>
Dsg-halla_gem mailing list<br>
<a href="mailto:Dsg-halla_gem@jlab.org" target="_blank">Dsg-halla_gem@jlab.org</a><br>
<a href="https://mailman.jlab.org/mailman/listinfo/dsg-halla_gem" target="_blank">https://mailman.jlab.org/mailman/listinfo/dsg-halla_gem</a></p>
</div>
</div>
</blockquote>
</div>
<p style="margin-left:4.8pt"> </p>
<p><u></u> <u></u></p>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote></div>