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<p class="MsoNormal">No problem</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Marc McMullen<o:p></o:p></p>
<p class="MsoNormal">Sr. Instrumentation Designer<o:p></o:p></p>
<p class="MsoNormal">Detector Support Group<o:p></o:p></p>
<p class="MsoNormal">(757) 269-7738<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="border:none;padding:0in"><b>From: </b><a href="mailto:adr4zs@virginia.edu">Anuruddha Rathnayake</a><br>
<b>Sent: </b>Tuesday, August 30, 2022 11:47 AM<br>
<b>To: </b><a href="mailto:mcmullen@jlab.org">Marc Mcmullen</a><br>
<b>Cc: </b><a href="mailto:dsg-halla_gem@jlab.org">dsg-halla_gem@jlab.org</a>; <a href="mailto:xb4zp@virginia.edu">
Bai, Xinzhan (xb4zp)</a>; <a href="mailto:hszumila@jlab.org">Holly Szumila-Vance</a>;
<a href="mailto:jab7bp@virginia.edu">john boyd</a>; <a href="mailto:ewertz@email.wm.edu">
Ezekiel Wertz</a>; <a href="mailto:sj9ry@virginia.edu">Jeffas, Sean (sj9ry)</a>; <a href="mailto:smanjukrishna92@gmail.com">
Manjukrishna Suresh</a>; <a href="mailto:saru@jlab.org">Sarashowati Dhital</a><br>
<b>Subject: </b>Re: [EXTERNAL] SBS GEM gas panel channel 13 not giving out gas</p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi Marc,<br>
<br>
No one of us made a mistake today and did not turn up the gas. It is running back again now. Thank you for catching that Marc!<br>
<br>
And yes we turned down channel 13 and plugged the gas tube of that GEM to channel 35 just so we can use the GEM. I will check the flow out from channel 13 in a bit.<br>
<br>
Best,<br>
Anu<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:13.5pt;font-family:Roboto;color:#202124">Displaying D04E6F74-0AED-43E7-8066-D51D308C33B2.jpeg.</span> gas. <o:p></o:p></p>
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<p class="MsoNormal">On Tue, Aug 30, 2022 at 10:57 AM Marc Mcmullen <<a href="mailto:mcmullen@jlab.org" target="_blank">mcmullen@jlab.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"inherit",serif">Hi Anu, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"inherit",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"inherit",serif">Currently the gas is shut off to the SBS supply panel. Maybe Jack is working on something. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"inherit",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"inherit",serif">In the meantime, I checked the internal connections in that chassis. Everything looks good. When the gas is restored, check to see if there is flow from ch13. Right now there is no output gas line
connected, I’m assuming someone moved it to a different channel to supply the GEM. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"inherit",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"inherit",serif">Marc<o:p></o:p></span></p>
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<p class="MsoNormal"><img border="0" width="457" height="2" style="width:4.7569in;height:.0208in" id="Horizontal_x0020_Line_x0020_1" src="cid:image002.png@01D8BC66.9C76FF40"><o:p></o:p></p>
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<p class="MsoNormal"><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> Tuesday, August 30, 2022 10:07 AM<br>
<b>To:</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>><br>
<b>Cc:</b> Bai, Xinzhan (xb4zp) <<a href="mailto:xb4zp@virginia.edu" target="_blank">xb4zp@virginia.edu</a>>; Holly Szumila-Vance <<a href="mailto:hszumila@jlab.org" target="_blank">hszumila@jlab.org</a>>; john boyd <<a href="mailto:jab7bp@virginia.edu" target="_blank">jab7bp@virginia.edu</a>>;
Ezekiel Wertz <<a href="mailto:ewertz@email.wm.edu" target="_blank">ewertz@email.wm.edu</a>>; Jeffas, Sean (sj9ry) <<a href="mailto:sj9ry@virginia.edu" target="_blank">sj9ry@virginia.edu</a>>; Manjukrishna Suresh <<a href="mailto:smanjukrishna92@gmail.com" target="_blank">smanjukrishna92@gmail.com</a>>;
Sarashowati Dhital <<a href="mailto:saru@jlab.org" target="_blank">saru@jlab.org</a>><br>
<b>Subject:</b> [EXTERNAL] SBS GEM gas panel channel 13 not giving out gas</span>
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<p class="MsoNormal" style="margin-left:4.8pt">Hi Marc and all,<br>
<br>
We are having an issue with channel 13 of the SBS GEM gas panel. We saw that the GEM connected to this channel is not giving out any signals; when we checked the gas from the gas channel connected to this GEM, we found that there is no gas flow (it still showed
that there is flow in the webpage in that channel).<br>
When we did a little bit of troubleshooting in the gas panel, we found that there is in fact gas flow coming into the chassis with the gas flow sensors (mass flow controllers?) but no gas flow coming out from it for channel 13.<br>
<br>
Could you please help us with this issue?<br>
Thank you!<br>
<br>
Best,<br>
Anu<o:p></o:p></p>
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