[Sbs_gems] [EXTERNAL] Re: [Fwd: path to GEM checkout]

[Anuruddha Rathnayake]

Hi All,

Please see the attached log entry for details of the test we just did/doing
(HV will stay on overnight like John mentioned)

https://logbooks.jlab.org/entry/3935002

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.

Best,
Anu

On Sat, Oct 30, 2021 at 4:55 PM Eric Fuchey <efuchey at jlab.org> wrote:

> Hi John, and all,
>
> as far as I am concerned, it's all good as long as the HV gets turned off
> before Jessie and his team get back to work in the hall on Monday 8am.
> So I want to see your plan provisioning someone to stop the DAQ GEMs HVs
> by  7:30am at the latest on Monday.
>
> Best,
> Eric
>
> > We have conducted the HV tests on all of the GEMs. We did a slow voltage
> > ramp up on each module/layer independently and held it at that maximum
> > voltage while we inspected for anything unusual (fluctuating current,
> > audible/visible sparks, etc.). No GEMs showed any unusual operation or
> > raised any points of concern about their well-being. From the HV test
> > standpoint, they seem to be okay.
> >
> > We will continue this inspection by holding HV overnight while monitoring
> > the currents.
> >
> > Before moving on from the overnight HV hold I wanted to get confirmation
> > on
> > the next steps. If all goes well with the HV hold, should we then switch
> > over to Ar/CO2 in the morning and run cosmics starting tomorrow evening?
> >
> > If this seems like a reasonable plan then that will be what we work
> > towards. If not, then please advise.
> >
> > Best regards,
> >
> > John Boyd
> >
> > On Sat, Oct 30, 2021 at 1:48 PM Gnanvo, Kondo (kg6cq) <
> kg6cq at virginia.edu>
> > wrote:
> >
> >> Sorry John,
> >>
> >> I meant to say less flexibility on Monday at 2 pm, giving the fact that
> >> you might have time restriction for the test because of Jessie’s crew
> >> more
> >> important work schedule
> >>
> >> Best John
> >>
> >>
> >>
> >> *From:* John Boyd <johnaboyd3 at gmail.com>
> >> *Sent:* Saturday, October 30, 2021 11:40 AM
> >> *To:* Gnanvo, Kondo (kg6cq) <kg6cq at virginia.edu>; Liyanage, Nilanga K
> >> (nl8n) <nl8n at virginia.edu>; sbs_gems at jlab.org; Huong Nguyen <
> >> htn3r.uva at gmail.com>; efuchey at jlab.org
> >> *Subject:* Re: [Sbs_gems] [Fwd: path to GEM checkout]
> >>
> >>
> >>
> >> Thank you for the response. We will plan to give them a look in a few
> >> hours. I am copying the RC (Eric Fuchey) on this email. We are
> >> coordinating
> >> with him and the INFN team to settle out the details. We will keep
> >> everyone
> >> updated & informed.
> >>
> >>
> >>
> >> Best,
> >>
> >>
> >>
> >> John
> >>
> >>
> >>
> >> On Sat, Oct 30, 2021 at 10:53 AM Gnanvo, Kondo (kg6cq)
> >> <kg6cq at virginia.edu>
> >> wrote:
> >>
> >> Hi John,
> >>
> >> In my opinion, it is a good idea to conduct this test this weekend if
> >> you
> >> are available to do so, including Anu.
> >>
> >>
> >>
> >> If you decide to do so, inform us and more importantly, keep in mind
> >> that
> >> the first UV GEM, closer to BB has the modified divider (R4 changed to
> >> .5M)
> >> therefore the HV should follow
> >>
> >>
> >>
> >> Also, ideally all layers need to be tested, so you might also keep Holly
> >> and Zeke in the loop about what their plan is.
> >>
> >>
> >>
> >> There will probably be less flexibility (time) to do a thorough test
> >> tomorrow
> >>
> >>
> >>
> >> Best regards
> >>
> >> Kondo
> >>
> >>
> >> ------------------------------
> >>
> >> *From:* John Boyd <johnaboyd3 at gmail.com>
> >> *Sent:* Saturday, October 30, 2021 8:08 AM
> >> *To:* Liyanage, Nilanga K (nl8n) <nl8n at virginia.edu>; Gnanvo, Kondo
> >> (kg6cq) <kg6cq at virginia.edu>; Huong Nguyen <htn3r.uva at gmail.com>;
> >> sbs_gems at jlab.org <sbs_gems at jlab.org>
> >> *Subject:* Fwd: [Sbs_gems] [Fwd: path to GEM checkout]
> >>
> >>
> >>
> >> In my email yesterday about whether or not to conduct the GEM test this
> >> weekend I forgot to include the email from the RC about options and
> >> availability for testing the GEMs.
> >>
> >>
> >>
> >> It is forwarded here in this email.
> >>
> >>
> >>
> >> Best,
> >>
> >>
> >>
> >> John
> >>
> >>
> >>
> >> ---------- Forwarded message ---------
> >> From: *Eric Fuchey* <efuchey at jlab.org>
> >> Date: Sat, Oct 30, 2021, 7:24 AM
> >> Subject: [Sbs_gems] [Fwd: path to GEM checkout]
> >> To: <sbs_gems at jlab.org>
> >>
> >>
> >>
> >> Here is this email forwarded to sbs_gems at jlab.org
> >> to summarize:
> >> the best time to checkout the GEMs is either this weekend, presumably at
> >> any time (unless Jessie warns me of any change of plans) OR Monday
> >> around
> >> 2pm.
> >> Eric
> >>
> >> ---------------------------- Original Message
> >> ----------------------------
> >> Subject: path to GEM checkout
> >> From:    "Eric Fuchey" <efuchey at jlab.org>
> >> Date:    Fri, October 29, 2021 5:42 pm
> >> To:      gautam at jlab.org
> >>          adr at jlab.org
> >>          ewertz at jlab.org
> >>          jboyd at jlab.org
> >>          jeffas at jlab.org
> >>          hszumila at jlab.org
> >>          kagnanvo at jlab.org
> >> Cc:      jbutler at jlab.org
> >>
> --------------------------------------------------------------------------
> >>
> >> Dear GEM experts,
> >>
> >> I'm reaching out to you as I know you want to check out the GEMs after
> >> the
> >> hall incidents.
> >>
> >> As per Jessie's input (and please Jessie correct me if I'm wrong), a
> >> good
> >> moment to check out your detector is sometimes this weekend e.g.
> >> tomorrow,
> >> as he and his team won't be around (unless something changes and he and
> >> his team need to go work in the hall this weekend in which case he will
> >> warn me.
> >>
> >> *if that cannot happen this weekend* a right moment to check the GEM out
> >> would be around 2pm on Monday when they are pausing on-going work in the
> >> hall, so you can coordinate with them;
> >>
> >> Either way *please warn me ahead of time* when you decide to check the
> >> GEMs, just so that I can, if need be, coordinate with Jessie.
> >>
> >> Best,
> >> Eric
> >>
> >> PS: I'm not entirely sure who in the group is supposed to take care of
> >> this task, so I included as many GEM people as possible.
> >>
> >>
> >>
> >>
> >> --
> >> Eric FUCHEY
> >>
> >>
> >>
> >>
> >>
> >> --
> >> Eric FUCHEY
> >>
> >>
> >> _______________________________________________
> >> Sbs_gems mailing list
> >> Sbs_gems at jlab.org
> >> https://mailman.jlab.org/mailman/listinfo/sbs_gems
> >>
> >>
> >
>
>
> --
> Eric FUCHEY
>
>
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