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<p class="MsoNormal">Hi John and Anu, <o:p></o:p></p>
<p class="MsoNormal">Thank for performing the tests. This is great to know that there was no damage to the chambers.
<o:p></o:p></p>
<p class="MsoNormal">I don’t think that additional test with Ar-CO2 is necessary, because the main point was to ensure that no damage was done to the structure of the chambers
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards <o:p></o:p></p>
<p class="MsoNormal">Kondo<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> Sbs_gems <sbs_gems-bounces@jlab.org> <b>On Behalf Of
</b>Anuruddha Rathnayake<br>
<b>Sent:</b> Saturday, October 30, 2021 5:08 PM<br>
<b>To:</b> efuchey@jlab.org<br>
<b>Cc:</b> sbs_gems@jlab.org; Huong Nguyen <htn3r.uva@gmail.com><br>
<b>Subject:</b> Re: [Sbs_gems] [EXTERNAL] Re: [Fwd: path to GEM checkout]<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi All,<br>
<br>
Please see the attached log entry for details of the test we just did/doing (HV will stay on overnight like John mentioned)<br>
<br>
<a href="https://logbooks.jlab.org/entry/3935002">https://logbooks.jlab.org/entry/3935002</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Eric: That sounds good. We will make sure to turn HV off before 7:30 am Monday and we will let you know once HV is off.<br>
<br>
Best,<br>
Anu<o:p></o:p></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">On Sat, Oct 30, 2021 at 4:55 PM Eric Fuchey <<a href="mailto:efuchey@jlab.org">efuchey@jlab.org</a>> wrote:<o:p></o:p></p>
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<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<p class="MsoNormal">Hi John, and all,<br>
<br>
as far as I am concerned, it's all good as long as the HV gets turned off<br>
before Jessie and his team get back to work in the hall on Monday 8am.<br>
So I want to see your plan provisioning someone to stop the DAQ GEMs HVs<br>
by 7:30am at the latest on Monday.<br>
<br>
Best,<br>
Eric<br>
<br>
> We have conducted the HV tests on all of the GEMs. We did a slow voltage<br>
> ramp up on each module/layer independently and held it at that maximum<br>
> voltage while we inspected for anything unusual (fluctuating current,<br>
> audible/visible sparks, etc.). No GEMs showed any unusual operation or<br>
> raised any points of concern about their well-being. From the HV test<br>
> standpoint, they seem to be okay.<br>
><br>
> We will continue this inspection by holding HV overnight while monitoring<br>
> the currents.<br>
><br>
> Before moving on from the overnight HV hold I wanted to get confirmation<br>
> on<br>
> the next steps. If all goes well with the HV hold, should we then switch<br>
> over to Ar/CO2 in the morning and run cosmics starting tomorrow evening?<br>
><br>
> If this seems like a reasonable plan then that will be what we work<br>
> towards. If not, then please advise.<br>
><br>
> Best regards,<br>
><br>
> John Boyd<br>
><br>
> On Sat, Oct 30, 2021 at 1:48 PM Gnanvo, Kondo (kg6cq) <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>><br>
> wrote:<br>
><br>
>> Sorry John,<br>
>><br>
>> I meant to say less flexibility on Monday at 2 pm, giving the fact that<br>
>> you might have time restriction for the test because of Jessie’s crew<br>
>> more<br>
>> important work schedule<br>
>><br>
>> Best John<br>
>><br>
>><br>
>><br>
>> *From:* John Boyd <<a href="mailto:johnaboyd3@gmail.com" target="_blank">johnaboyd3@gmail.com</a>><br>
>> *Sent:* Saturday, October 30, 2021 11:40 AM<br>
>> *To:* Gnanvo, Kondo (kg6cq) <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>>; Liyanage, Nilanga K<br>
>> (nl8n) <<a href="mailto:nl8n@virginia.edu" target="_blank">nl8n@virginia.edu</a>>;
<a href="mailto:sbs_gems@jlab.org" target="_blank">sbs_gems@jlab.org</a>; Huong Nguyen <<br>
>> <a href="mailto:htn3r.uva@gmail.com" target="_blank">htn3r.uva@gmail.com</a>>;
<a href="mailto:efuchey@jlab.org" target="_blank">efuchey@jlab.org</a><br>
>> *Subject:* Re: [Sbs_gems] [Fwd: path to GEM checkout]<br>
>><br>
>><br>
>><br>
>> Thank you for the response. We will plan to give them a look in a few<br>
>> hours. I am copying the RC (Eric Fuchey) on this email. We are<br>
>> coordinating<br>
>> with him and the INFN team to settle out the details. We will keep<br>
>> everyone<br>
>> updated & informed.<br>
>><br>
>><br>
>><br>
>> Best,<br>
>><br>
>><br>
>><br>
>> John<br>
>><br>
>><br>
>><br>
>> On Sat, Oct 30, 2021 at 10:53 AM Gnanvo, Kondo (kg6cq)<br>
>> <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>><br>
>> wrote:<br>
>><br>
>> Hi John,<br>
>><br>
>> In my opinion, it is a good idea to conduct this test this weekend if<br>
>> you<br>
>> are available to do so, including Anu.<br>
>><br>
>><br>
>><br>
>> If you decide to do so, inform us and more importantly, keep in mind<br>
>> that<br>
>> the first UV GEM, closer to BB has the modified divider (R4 changed to<br>
>> .5M)<br>
>> therefore the HV should follow<br>
>><br>
>><br>
>><br>
>> Also, ideally all layers need to be tested, so you might also keep Holly<br>
>> and Zeke in the loop about what their plan is.<br>
>><br>
>><br>
>><br>
>> There will probably be less flexibility (time) to do a thorough test<br>
>> tomorrow<br>
>><br>
>><br>
>><br>
>> Best regards<br>
>><br>
>> Kondo<br>
>><br>
>><br>
>> ------------------------------<br>
>><br>
>> *From:* John Boyd <<a href="mailto:johnaboyd3@gmail.com" target="_blank">johnaboyd3@gmail.com</a>><br>
>> *Sent:* Saturday, October 30, 2021 8:08 AM<br>
>> *To:* Liyanage, Nilanga K (nl8n) <<a href="mailto:nl8n@virginia.edu" target="_blank">nl8n@virginia.edu</a>>; Gnanvo, Kondo<br>
>> (kg6cq) <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>>; Huong Nguyen <<a href="mailto:htn3r.uva@gmail.com" target="_blank">htn3r.uva@gmail.com</a>>;<br>
>> <a href="mailto:sbs_gems@jlab.org" target="_blank">sbs_gems@jlab.org</a> <<a href="mailto:sbs_gems@jlab.org" target="_blank">sbs_gems@jlab.org</a>><br>
>> *Subject:* Fwd: [Sbs_gems] [Fwd: path to GEM checkout]<br>
>><br>
>><br>
>><br>
>> In my email yesterday about whether or not to conduct the GEM test this<br>
>> weekend I forgot to include the email from the RC about options and<br>
>> availability for testing the GEMs.<br>
>><br>
>><br>
>><br>
>> It is forwarded here in this email.<br>
>><br>
>><br>
>><br>
>> Best,<br>
>><br>
>><br>
>><br>
>> John<br>
>><br>
>><br>
>><br>
>> ---------- Forwarded message ---------<br>
>> From: *Eric Fuchey* <<a href="mailto:efuchey@jlab.org" target="_blank">efuchey@jlab.org</a>><br>
>> Date: Sat, Oct 30, 2021, 7:24 AM<br>
>> Subject: [Sbs_gems] [Fwd: path to GEM checkout]<br>
>> To: <<a href="mailto:sbs_gems@jlab.org" target="_blank">sbs_gems@jlab.org</a>><br>
>><br>
>><br>
>><br>
>> Here is this email forwarded to <a href="mailto:sbs_gems@jlab.org" target="_blank">
sbs_gems@jlab.org</a><br>
>> to summarize:<br>
>> the best time to checkout the GEMs is either this weekend, presumably at<br>
>> any time (unless Jessie warns me of any change of plans) OR Monday<br>
>> around<br>
>> 2pm.<br>
>> Eric<br>
>><br>
>> ---------------------------- Original Message<br>
>> ----------------------------<br>
>> Subject: path to GEM checkout<br>
>> From: "Eric Fuchey" <<a href="mailto:efuchey@jlab.org" target="_blank">efuchey@jlab.org</a>><br>
>> Date: Fri, October 29, 2021 5:42 pm<br>
>> To: <a href="mailto:gautam@jlab.org" target="_blank">gautam@jlab.org</a><br>
>> <a href="mailto:adr@jlab.org" target="_blank">adr@jlab.org</a><br>
>> <a href="mailto:ewertz@jlab.org" target="_blank">ewertz@jlab.org</a><br>
>> <a href="mailto:jboyd@jlab.org" target="_blank">jboyd@jlab.org</a><br>
>> <a href="mailto:jeffas@jlab.org" target="_blank">jeffas@jlab.org</a><br>
>> <a href="mailto:hszumila@jlab.org" target="_blank">hszumila@jlab.org</a><br>
>> <a href="mailto:kagnanvo@jlab.org" target="_blank">kagnanvo@jlab.org</a><br>
>> Cc: <a href="mailto:jbutler@jlab.org" target="_blank">jbutler@jlab.org</a><br>
>> --------------------------------------------------------------------------<br>
>><br>
>> Dear GEM experts,<br>
>><br>
>> I'm reaching out to you as I know you want to check out the GEMs after<br>
>> the<br>
>> hall incidents.<br>
>><br>
>> As per Jessie's input (and please Jessie correct me if I'm wrong), a<br>
>> good<br>
>> moment to check out your detector is sometimes this weekend e.g.<br>
>> tomorrow,<br>
>> as he and his team won't be around (unless something changes and he and<br>
>> his team need to go work in the hall this weekend in which case he will<br>
>> warn me.<br>
>><br>
>> *if that cannot happen this weekend* a right moment to check the GEM out<br>
>> would be around 2pm on Monday when they are pausing on-going work in the<br>
>> hall, so you can coordinate with them;<br>
>><br>
>> Either way *please warn me ahead of time* when you decide to check the<br>
>> GEMs, just so that I can, if need be, coordinate with Jessie.<br>
>><br>
>> Best,<br>
>> Eric<br>
>><br>
>> PS: I'm not entirely sure who in the group is supposed to take care of<br>
>> this task, so I included as many GEM people as possible.<br>
>><br>
>><br>
>><br>
>><br>
>> --<br>
>> Eric FUCHEY<br>
>><br>
>><br>
>><br>
>><br>
>><br>
>> --<br>
>> Eric FUCHEY<br>
>><br>
>><br>
>> _______________________________________________<br>
>> Sbs_gems mailing list<br>
>> <a href="mailto:Sbs_gems@jlab.org" target="_blank">Sbs_gems@jlab.org</a><br>
>> <a href="https://mailman.jlab.org/mailman/listinfo/sbs_gems" target="_blank">https://mailman.jlab.org/mailman/listinfo/sbs_gems</a><br>
>><br>
>><br>
><br>
<br>
<br>
-- <br>
Eric FUCHEY<br>
<br>
<br>
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<a href="https://mailman.jlab.org/mailman/listinfo/sbs_gems" target="_blank">https://mailman.jlab.org/mailman/listinfo/sbs_gems</a><o:p></o:p></p>
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